212 spp. in 14 genera in our area, ~750 spp. in 36 genera worldwide(1)
Hairy bees, typically with pale hair bands on the metasoma. Males typically have very long antennae. According to the site linked below, "two distinguishing characteristics are the following: the Eucerini have long paraglossae [lobes at the outer edges of the tip of the lower mouthparts] that reach the base of the labial palpus. They also have parocular carina [ridges on the outside portion of the eye area].
Key to genera in LaBerge (1957)
The clypeus protrudes notably. (2)
No stiff hairs beside the margin of the inner eye, distinguishing them from Exomalopsini. (2)
The top of the head is flattish or slightly concave, distinguishing them from Emphorini. This gives them an appearance of bulging eyes. (2)
shows the inner eye and top of head well.
holarctic and neotropical + ~40 Afrotropical spp. and just a couple in SE Asia(1)
Nesting is in the ground for all species. Known nests are vertical burrows in flat ground.
LaBerge, W. E. 1956a. A revision of the bees of the genus Melissodes
in North and Central America. Part I(Hymenoptera, Apidae). University of Kansas Science Bulletin 37 (pt. 2, no. 18): 911-1194. (Full Text
LaBerge, W. E. 1956b. A revision of the bees of the genus Melissodes
in North and Central America. Part II (Hymenoptera, Apidae). University of Kansas Science Bulletin 38 (pt. 1, no. 8): 533-578. (Full Text
LaBerge, W. E. 1957. The genera of bees of the tribe Eucerini in North and Central America (Hymenoptera, Apoidea). American Museum Novitates, No. 1837, Amer. Mus. of Nat. Hist., NY, 44 pp. (Full Text
LaBerge, W. E. 1958. Notes on the North and Central American bees of the genus Svastra Holmberg (Hymenoptera: Apidae). Journal of the Kansas Entomological Society 31 (4): 266-273.
LaBerge, W. E. 1961. A revision of the bees of the genus Melissodes
in North and Central America. Part III (Hymenoptera, Apidae). University of Kansas Science Bulletin 42 (5): 283-663. (Full Text
LaBerge, W.E. 2001. Revision of the bees of the genus Tetraloniella
in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36 (3): 64-162. (Full Text
Timberlake, P. H. 1969. A contribution to the systematics of North American species of Synhalonia (Hymenoptera, Apoidea). University of California Publications in Entomology 57: 1-76.