Though they are relatively understudied, non-native bees are ubiquitous and have enormous potential economic and environmental impacts. These impacts may be positive or negative, and are often unquantified. In this manuscript, I review literature on the known distribution and environmental and economic impacts of 80 species of introduced bees. The potential negative impacts of non-native bees i...

Gyrodromella represents a subgenus of the osmiine bee genus Chelostoma (Megachilidae) containing eight species, which are confined to the Palaearctic region. Analysis of female pollen loads, field observations and literature data suggest that all C. (Gyrodromella) species are oligolectic harvesting pollen exclusively on flowers of Campanula and possibly also closely related Campanulaceae genera...

TheDufourÕs glandof twosolitarycavity-nestingbees,Osmia lignariaSayandMegachile rotundata (F.) (Hymenoptera: Megachilidae), was examined with microscopy to determine the structure and arrangement of the gland in the sting apparatus. The appearance and relative size of the DufourÕs gland of these two bee species are similar. Unlike the termination of the DufourÕs gland at the base of the sting i...

Megachile rotundata (F.), a gregarious, cavity-nesting, leaf-cutting bee, is used throughoutNorthAmerica for the pollination of alfalfa,Medicago sativaL., seed crops.We examined the inßuence of various temperature regimes on development, survival, emergence, and longevity in both nondiapausing and diapausing forms of this species. In general, development rates increased with increasing constant...

Hoplitis bees of the Palaearctic subgenus Stenosmia (Megachilidae) inhabit deserts and semideserts between southern Spain and eastern Asia. They nest in excavated burrows in the soil and collect pollen from plant taxa that typically grow in desert areas, such as Frankenia (Frankeniaceae), Peganum (Nitrariaceae), Tamarix (Tamaricaceae) or Zygophyllum (Zygophyllaceae). The taxonomic revision of t...

Ten species belonging to the tribe Osmiini were collected and identified from east of Türkiye during 2017-2021. The specimens identifed as Chelostoma emarginatum (Nylander, 1856), Heriades rubicola Pérez, 1890, Hoplitis leucomelana (Kirby, 1802), tridentata (Dufour Perris, 1840, (Anthocopa) serainae Müller, 2012, (Hoplitis) sp., Osmia aurulenta (Panzer, 1799), gallarum Spinola, 1808, (Helicosmi...