The Hemiptera present some instructing cases of special distribution, a few of which are considered. The relation of the distribution to distribution of food plants is discussed and cases cited where there is apparently entire independence of climate, latitude, altitude, etc.

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Additions To The Catalogue Of Iowa Hemiptera, Herbert Osborn Jan 1889

Additions To The Catalogue Of Iowa Hemiptera, Herbert Osborn

Proceedings of the Iowa Academy of Science

The additions to my list of two years ago presented in this contribution number thirty and I have a few species undetermined that can probably be included by the time the full list is published.

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The Native Food Fishes Of Iowa, Seth E. Meek Jan 1889

The Native Food Fishes Of Iowa, Seth E. Meek

Proceedings of the Iowa Academy of Science

In the waters of Iowa, including the Mississippi River along her eastern border, are found about one hundred species of fishes, of these about thirty-six are usually found in our markets, and are regarded as food fishes of more or less value.

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The Crystalline Rocks Of Missouri, Erasmus Haworth Jan 1889

The Crystalline Rocks Of Missouri, Erasmus Haworth

Proceedings of the Iowa Academy of Science

In the May and June numbers American Geologist the writer published a preliminary description and classification of the crystalline rock of Missouri. Since that time considerable more field work has been done, and much new material gathered which is now being examined in the laboratory.

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Pearl Bearing Unios, F. M. Witter Jan 1889

Pearl Bearing Unios, F. M. Witter

Proceedings of the Iowa Academy of Science

No abstract available – No text presented.

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Notes On A Fossil Wood From The Keokuk Limestone, Keokuk, Iowa, C. H. Gordon Jan 1889

Notes On A Fossil Wood From The Keokuk Limestone, Keokuk, Iowa, C. H. Gordon

Proceedings of the Iowa Academy of Science

Some years since a portion of supposed fossil wood was obtained from an eighteen inch limestone layer about six or eight feet below the Geode bed. It was secure by Mr. S. J. Wallace and placed in the rooms of the Keokuk Library Association. A brief mention was made of it in a letter to the editors of the American Journal of Science and Arts, as noted in the May issue of 1878.

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On The Keokuk Beds And Their Contained Fossils In The Vicinity Of Keokuk, Iowa, C. H. Gordon Jan 1889

On The Keokuk Beds And Their Contained Fossils In The Vicinity Of Keokuk, Iowa, C. H. Gordon

Proceedings of the Iowa Academy of Science

Outside the region covered by this paper, the most notable exposure of this formation occurs at Crawfordsville, Indiana, where its thickness is said to be two hundred and eighty feet. South of the Iowa line, exposures occur along the Mississippi in limited areas, and southwestward in Missouri, yielding most of the lead in that region.

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On The Wax Glands Of The Pemphiginae, Herbert Osborn Jan 1889

On The Wax Glands Of The Pemphiginae, Herbert Osborn

Proceedings of the Iowa Academy of Science

After considering the accepted ideas concerning the wax glands of the Coccidae and Aphidae, the paper describes the structure of these glands in Pemphigus tessellata Fitch as an illustration of the unicellular form, (apparently the only form hitherto recognized ), and in Schizoneura cratagi Oestlund, as illustrating a complex gland.