1 88 UNIVERSITY OF COLORADO STUDIES 



ANTHOPHOROIDEA 



Scopa absent. Melectidae [Melectidae and Nomadidae] 



Scopa present; three submarginal cells. I 



i Marginal cell with apex rounded; stigma obsolete or nearly. 



Anthophoridae [Anthophorinae] 



Marginal cell lanceolate, apex acute, bent away from costa. 



2 



2 Vertex crested; paraglossae at least as long as first two joints of 



labial palpi together; basitarsus broad, with a posterior apical 



appendage. Euceridae [Eucerinae] 



Vertex not crested; paraglossae shorter than first two joints of labial 



palpi together; basitarsus narrow. 



Emphoridae [Entechnia = Melitoma.] 



Protandrena, not found in Illinois, Mr. Robertson would place in Panurgidae, as a 

 subfamily Protandreninae. It has three submarginal cells. Robertson's Emphoridae 

 includes two subfamilies: 



Pulvilli absent. Emphorinae: Emphor [not in our fauna.] 



Pulvilli present. Entechiinae: Entechnia. 



Vachal has recently argued that Entechnia is the same as the prior genus Melitoma, 

 and upon going over the description of the latter, this certainly seems to be correct. 



Artificial Key 



The numbers following the generic names refer to the figures of wings. 



Only one submarginal cell; minute parasitic bees. Phileremulus 



Two submarginal cells. I 



Three submarginal cells. 42 



Marginal cell sharply truncate at tip, the lower apical corner with an appendicular 



nervure (Panurgidae). 2 



Marginal cell not thus truncate and appendiculate. 8 



Marginal cell short; small bees with the head and thorax usually metallic, dark green 



or blue, and the abdomen usually with light spots or bands. Perdita (4, 5) 



Marginal cell rather long, more narrowly truncate; head and thorax not metallic. 



3 



Abdomen with conspicuous light tegumentary spots or bands. Spinoliella (6) 



Abdomen without light tegumentary markings. 4 



Hairy bees, with the abdomen more or less conspicuously banded. Calliopsis 



Abdomen shining, black, not banded. 5 



Coarsely punctured; wings very dark; marginal cell obliquely truncate; first recur- 

 rent nervure joining second submarginal cell no great distance before its middle. 



Pseudopanurgus 

 Delicately punctured; wings hyaline or subhyaline. 6 



First recurrent nervure entering second submarginal cell a considerable distance from 

 its base. Panurginus (7) 



