We addressed the importance of third dimension and color contrast as cues used in close range nest localization by Osmia lignaria Say and Megachile rotundata (F.) females. By manipulating the surface of the nesting site, we compared 3-dimensional configurations of three different depths (1 cm, 2 cm, and 6 cm) and three different color contrasts (black-black, black-gray, and black-blue). We also...

Floral associations of three species of Megachile (Callomegachile) from NW India are provided: M. (C.) disjuncta, M. (C.) cephalotes and M. (C.) lerma. Morphological characters of both sexes and the male genitalia of each species are presented and illustrated. All three species are new records for Union Territory (Chandigarh) and Haryana in India.

The data on 38 species of megachilid bees in the tribes Lithurgini, Dioxyini, and Megachilini collected Nakhchivan Autonomous Republic Azerbaijan mainly 2018–2020 are given. Seventeen new to Azerbaijan, four other as a result present investigation fauna currently numbers 160 family Megachilidae. A mosaic gynandro¬morph Megachile albisecta (Klug, 1817) is also described.

A new species of the extinct bee genus Ctenoplectrella Cockerell (Megachilinae: Ctenoplectrellini) is described and figured from two females preserved in middle Eocene (Lutetian) Baltic amber. Ctenoplectrella phaetonsp. n. is distinguished from its congeners on the basis of its body proportions, integumental sculpturing, wing venation, and pubescence, and is one of the more distinctive members ...

In the present study, we analysed bee fauna reported in Egadi Archipelago (circumsicilian islands). Field and bibliographical research carried out have allowed us to identify 40 taxa, between species subspecies, belonging five families: Colletidae (3 species), Andrenidae (9 spp.), Halictidae (4 Megachilidae (15 Apidae spp.). Twenty-seven are here for first time Archipelago, together with 13 pre...

a survey on the megachilid bees (hymenoptera: megachilidae) fauna of northern iran, between 2010 and 2011, led to the identification of eleven species of the genus coelioxys latreille belonging to subgenera allocoelioxys (6 species), boreocoelioxys (2 species), coelioxys (2 species) and liothyrapis (1 species). of these, six species and one subgenus (liothyrapis) are new to the fauna of iran. d...