Tables for The Separation of Some Bees of The Genera Coelioxys and Colletes by T. D. A. Cockerell

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The American Spider Genera Spintharus and Thwaitesia (Araneae Theridiidae) by Herbert W. Levi

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Two New Genera of Diapriinae (Diapriidae, Hymenoptera) With Transantarctic Relationships by Lubomir Masner

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Descriptions of New Species and Genera of West African Lepidoptera.—I by W. J. Holland

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The Identity of the Ant Genera Gesomyrmex Mayr and Dimorphomyrmex Ernest Andre by William Morton Wheeler

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Some New Genera and Species of Attidae From South Africa by George W. Peckham, Elizabeth G. Peckham

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Flower morphology of selected species of genera Kalanchoe and Bryophyllum in Nigeria by Tolulope Olutayo, Oluwabunmi Arogundade

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The Spider Genera Cerocida, Hetschkia, Wirada and Craspedisia (Araneae: Theridiidae) by Herbert W. Levi

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New and Undescribed Genera and Species of West African Noctuidae.—I by W. J. Holland

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A Synopsis of the Chrysidid Genera of Neotropical America (Chrysidoidea, Hymenoptera) by Lynn S. Kimsey, Richard M. Bohart

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The Orb-Weaver Genera Singa and Hypsosinga in America (Araneae: Araneidae) by Herbert W. Levi

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Frontal sinus variation in extant species of the genera Pan, Gorilla and Homo by Antoine Balzeau, Lou Albessard-Ball, Anna Maria Kubicka, Camille Noûs, Laura T. Buck

“…Frontal pneumatisation is not present in all primates, and among extant species, ethmoidally-derived frontal sinuses are present only in the genera Pan, Gorilla and Homo. A simple and repeatable method is described here to quantify variation in the shape, size and bilateral variation of the frontal sinuses. …”
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On the Significance of Pseudofemale Behavior in the Neotropical Cockroach Genera Blaberus, Archimandrita and Byrsotria by Peter W. Wendelken, Robert H. Barth, Jr.

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Regularidades Numéricas e Genera- lizações: Uma Atividade de Investigação by ROSANA De Oliveira

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North American Bees of the Genera Andrena and Melitta in the British Museum.—I by T. D. A. Cockerell

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The Neotropical Orb-Weaver Genera Epeiroides, Bertrana and Amazonepeira (Araneae: Araneidae). by Herbert W. Levi

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Determination of fungal genera composition and total toxicity of feed produced in the Republic of Crimea by S. S. Ibragimova, O. V. Pruntova, S. I. Danilchenko, Ye S. Yerofeeva

“…In 2017–2019, feed and raw feed materials produced in the Republic of Crimea were tested for mold fungi and genera composition thereof; the feedstuffs were tested for total toxicity by bioassay in rabbits. …”
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The Croton genera (Euphorbiaceae) and its richness in chemical constituents with potential range of applications by Carlos Andrés Coy-Barrera, Laura Galvis, Maria Juliana Rueda, Sergio Alejandro Torres-Cortés

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Illustrated Key to the Genera of Free-Living Marine Nematodes in the Superfamily Chromadoroides Exclusive of the Chromadoridae by Armen C. Tarjan, Edwin J. Keppner

“… This is an illustrated key to 55 genera of free-living marine nematodes of the superfamily Chromadoroidea, exclusive of the Chromadoridae, (Nematoda: Chromadorida: Chromadorina). …”
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Trechoblemus in North America, With a Key to North American Genera of Trechinae (Coleoptera: Carabidae) by Thomas C. Barr

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