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Articles 251821 - 251850 of 255934
Full-Text Articles in Life Sciences
Uber Einige Von Fabricius, Illiger Und Erichson Benannte Prosopis- Und Halictus-Arten, J. D. Alfken
Uber Einige Von Fabricius, Illiger Und Erichson Benannte Prosopis- Und Halictus-Arten, J. D. Alfken
A
In dem Hymenopterenkataloge von Dalla-Torre sind bei den Apiden auch die Namen aufgenommen worden, welche Illiger im Magazin für Insektenkunde, V, 1806, für eine ziemlich grofse Zahl paläarktischer Arten eingeführt hat, ohne eine Beschreibung von diesen zu liefern. So sehr es zu bedauern ist, dafs diese Namen, die natürlich keine Gültigkeit besitzen und daher besser in der Veriwnkung geblieben wären, dem Kataloge einverleibt wurden, so seheint es mir, eh sie durch DaIla-Torre eben weiteren Kreisen bekannt gegeben wurden, doch angebracht zu sein, sie bei den Arten als Synonyme anzuführen, auf welche sie wirklich bezogen werden müssen.
Beitrag Zur Kenntnis Der Apidenfauna Von Ostpreußen, J. D. Alfken
Beitrag Zur Kenntnis Der Apidenfauna Von Ostpreußen, J. D. Alfken
A
Die Physikalisch-okonomische Gesellschaft in Konigsberg ersuchte mich auf Anregung von Herrn Kreisassistenzarzt Dr. P. SPEISER in Sierakowitz, welcher alle die entomologische Erforschung der beinen ostlichen preuBischen Provinzen betreffenden Bestrebungen in anerkennenswerter Weise zu forden sucht, durch ihren Vorsitzenden, Herrn Geheimrat Professor Dr. M. BRAUN, eine vierzehntagige Sammelreise zum Studium der Bienenfauna in die Provinz OstprueBen zu unternehman. Infolge dieser Aufforderung war ich in der Zeit vom 31. Jul ibis 13 August 1909 an verschiedenen Orten des genannten Gebietes mit dem Beobachten und Einsammaln der Apiden beschaftigt. Leider waren die ersten beiden Tage meier Anwesenheit in der Provinz, sowie der 4. …
Mutilla Schencki Schmiedeknecht., H. Bischoff
Die Nestanlage Von Xylocopa Frontalis Oliv., A. W. Bertoni, C. Schrottky
Die Nestanlage Von Xylocopa Frontalis Oliv., A. W. Bertoni, C. Schrottky
Ba
Trotzdem unter den südamerikanischen Bienen die Xylocopaarten zu den häufigsten Erscheinungen gehören, ist über ihre Lebensweise noch sehr wenig bekannt geworden. Zugegeben, daß alle Arten dieser Gattung mehr oder minder nach einem Typ bauen, ist es andererseits doch recht wichtig, die Nestanlagen verschiedener Species zu untersuchen, da zweifellos jede Art ihre besonderen Eigentümlichkeiten hat, deren Kenntnis in gewissen Fällen selbst dem Systematiker von größtem Nutzen sein kann. Im Gegensatze zu vielen anderen solitären Bienen, die harmlos und friedlich bleiben, selbst wenn ihre Brut bedroht ist, zeigt sich unsere Xylocopa bei Verteidigung ihres Heimes äußerst reizbar, kampfesmutig und todesverachtend. Es blieb …
Ruwenzori Expedition Reports No. 13 Hymenoptera, C. T. Bingham
Ruwenzori Expedition Reports No. 13 Hymenoptera, C. T. Bingham
Ba
No abstract provided.
Neue Beiträge Zur Lebensweise Der Trigonaloiden., H. Bischoff
Neue Beiträge Zur Lebensweise Der Trigonaloiden., H. Bischoff
Ba
No abstract provided.
On Some Diplopteryga From The Southwest Of North America, Peter Cameron
On Some Diplopteryga From The Southwest Of North America, Peter Cameron
Bu
No abstract provided.
Zwei Turkestanische Prosopis-Arten (Hymenoptera, Prosophidae), J. D. Alfken
Zwei Turkestanische Prosopis-Arten (Hymenoptera, Prosophidae), J. D. Alfken
A
Kopf nach unten wenig verschmalert, wie bei P. variegata F. gestaltet und skulpturiert, aber Scheitel und Schlafen viel glanzender und sparsamer punktiert. Wangenfurchen die Hohe des oberen Augenrandes erreichend und eln wenig gegen die ausseren Nebenaugen gebogen. Spitze der Oberkiefer und Vorderrand des Clypeus rotbraun. Wangcn mit grossem dreieckigem Flecken, Clypeus mit schmalem Liingsflecken in der Mitte und Stirnschildchen mit kleinem Querflecken von gelber Farbe. Fuhlergeissel unten rotbraun, oben schwarzbraun. Mesonotum nicht, wie bei P. variegata, matt und dicht anliegend kurzhaarig.
Practical Information On The Scolytid Beetles On North American Forests I. Barkbeetles Of The Genus Dendroctonus, Andrew Delmar Hopkins
Practical Information On The Scolytid Beetles On North American Forests I. Barkbeetles Of The Genus Dendroctonus, Andrew Delmar Hopkins
The Bark Beetles, Fuels, and Fire Bibliography
During the writer's investigations of extensive insect depredations in the forests of West Virginia, from 1890 to 1902, he was forcibly impressed with the importance of the forest-insect problem in connection with any future efforts toward the successful management of the forests of this country, and was thus led to give special attention to the subject. It was soon realized that among the principal groups of insect enemies of forest trees the scolytid bark and wood boring beetles must occupy first rank, both in economic importance and systematic interest. Subsequent investigations in West Virginia, in connection with the work of …
Notes Upon Variation Of Melissodes Lupina Cresson, T. D. A. Cockerell
Notes Upon Variation Of Melissodes Lupina Cresson, T. D. A. Cockerell
Ca
No abstract provided.
Some New Bees Of The Genus Coelioxys, T. D. A. Cockerell
A New Bee Of The Genus Megachile From Africa, T. D. A. Cockerell
A New Bee Of The Genus Megachile From Africa, T. D. A. Cockerell
Ca
No abstract provided.
Descriptions Of Hymenoptera From Baltic Amber, T. D. A. Cockerell
Descriptions Of Hymenoptera From Baltic Amber, T. D. A. Cockerell
Ca
No abstract provided.
Some European Bees, T. D. A. Cockerell
Le "Sans De La Direction" Chez Les Abeilles, Gaston Bonnier
Two New Bees, T. D. A. Cockerell
Description Of A New Parasitic Bee (Nomada) From Borneo, Peter Cameron
Description Of A New Parasitic Bee (Nomada) From Borneo, Peter Cameron
Bu
No abstract provided.
On Some Undescribed Indian Bees (Tetralonia, Megachile And Halictus) (Hym.), Peter Cameron
On Some Undescribed Indian Bees (Tetralonia, Megachile And Halictus) (Hym.), Peter Cameron
Bu
No abstract provided.
Annual Report Of The Director Of The South Dakota Agricultural Experiment Station For Year Ended June 30, 1909, South Dakota State College Of Agriculture And Mechanic Arts
Annual Report Of The Director Of The South Dakota Agricultural Experiment Station For Year Ended June 30, 1909, South Dakota State College Of Agriculture And Mechanic Arts
Agricultural Experiment Station and Research Farm Annual Reports
No abstract provided.
Citrus Notes-Handling The Orange-Riverside1909, Charles C. Chapman
Citrus Notes-Handling The Orange-Riverside1909, Charles C. Chapman
Charles C. Chapman Citrus Speeches
This speech was presented to the Riverside Y.M.C.A. on April 13, 1909. Mr. Chapman discusses the necessity of careful handling of the orange, from the tree to the market, so that the oranges are not bruised or damaged. He delves into details such as using the right kind of clippers, placing the fruit in clean picking bags and boxes that are the right size, using the right kind of ladder, and wagons with springs to properly transport the oranges.
Oats, E. G. Montgomery
Oats, E. G. Montgomery
University of Nebraska Historical Extension: Bulletin
There is no more serious question confronting .the Nebraska farmer today than the oat problem. During the past few years, farmers generally believe they have lost money on the crop. It is necessary to grow some spring grain crop, and while many are looking for a substitute, such as barley, speltz, and spring wheat, yet none of these crops takes the place of oats in a satisfactory manner. While soil fertility must receive immediate attention, still our yields would be decidedly increased thru the. use of varieties best adapted to the region, with good preparation of the seed·bed drilling with …
Citrus Talks-Handling The Orange, Charles C. Chapman
Citrus Talks-Handling The Orange, Charles C. Chapman
Charles C. Chapman Citrus Speeches
This speech was presented in Redlands, California on January 23, 1909. This speech is similar to the speech given at the Riverside Y.M.C.A. in 1909 and discusses the care and handling of the orange from tree to market.
Description Of A New Species Of Ceratina From Borneo, Peter Cameron
Description Of A New Species Of Ceratina From Borneo, Peter Cameron
Bu
No abstract provided.
Description Of A New Genus And Species Of Cryptinae (Ichneumonidae) From Borneo, Peter Cameron
Description Of A New Genus And Species Of Cryptinae (Ichneumonidae) From Borneo, Peter Cameron
Bu
No abstract provided.
A New Bee From Tahiti, T. D. A. Cockerell
A New Name In Megachile, T. D. A. Cockerell
The House Fly (Musca Domestica) And Allies, Lawrence Bruner
The House Fly (Musca Domestica) And Allies, Lawrence Bruner
Department of Entomology: Faculty Publications
"Of what use are flies, anyway?" This and similar questions have frequently been asked of the writer by persons who seem to think that each and every living thing has been created solely for some special benefit to man.
Primarily the common house fly (Musca domestica), together with several of its allies which habitually frequent human habitations, are scavengers. In this role they assist in the removal of filth and litter of various sorts that too often are permitted to accumulate in the vicinity of our homes, schools, offices, and ' places of business or pleasure. These flies …
Bulletin No. 104 - The Storage Of Winter Precipitation In Soils, John A. Widtsoe
Bulletin No. 104 - The Storage Of Winter Precipitation In Soils, John A. Widtsoe
UAES Bulletins
It has been found that the production of one pound of dry plant substance on soils of average fertility, requires in humid districts not more than five hundred pounds of water, and in arid districts like Utah about seven hundred and fifty pounds. This indicates that the average rainfall of Utah, which is about twelve inches, if properly conserved in the soil, is sufficient to produce annually, without irrigation, from thirty to forty-five bushels of wheat to the acre, or corresponding yields of other crops. The realization of this truth has changed greatly our views of irrigation practices. The beginning …
On Three Undescribed Fossorial Hymenoptera (Crabro And Psen) From Borneo, Peter Cameron
On Three Undescribed Fossorial Hymenoptera (Crabro And Psen) From Borneo, Peter Cameron
Bu
No abstract provided.
Descriptions And Records Of Bees.— Xx., T. D. A. Cockerell