ANDRENID.il. 279 



to whom I am indebted for the specimen I have de- 

 scribed ; the ? , much resembles an IlaUctns, hut the two 

 submarginal cells of the wings and simple fifth abdominal 

 segment will distinguish it. 



NOMADA, Fabr. 



Labial palpi four-jointed, the joints cylindrical, maxillary 

 palpi six-jointed, paraglossae produced at the apex into an 

 elongate sharp process, tongue elongate ; cardines very 

 long, lora slender^ but well defined, submentum elongate, 

 labrum transverse; clypeus in. the S densely hairy, second 

 antennal joint exceedingly short, in the c? occasionally 

 hardly visible ; scutellum in both sexes generally more or 

 less raised and often bituberculate, wings with three sub- 

 marginal cells; abdomen generally more or less banded or 

 spotted with yellow, six ventral segments exposed in 

 the c?, seventh simple, eighth generally produced at the 

 apex into a narrow curved process, spinose or hairy at its 

 sides and usually terminating in two recurved spines or 

 hooks, genital armature with the cardo very large, and with 

 the apices of the stipites generally densely tufted with 

 hairs, their inner margin with a deep emargination, ? with 

 the sixth ventral segment flat, truncate, armed at each side 

 with several thick curved spines, stinging powers feeble, 

 legs simple, ? without scopje, apex of posterior tibiae 

 spinose, offering good specific characteristics. Packard 

 says that the larv» of this genus have, like Andrena, three 

 conspicuous spines on the upper and posterior edge of the 

 orbit. 



This is perhaps one of our most interesting genera, it is 

 essentially inquiline, some of its species are apparently 

 constant to one particular host, some associate with several. 

 It is also remarkable for the vivid wasp-like coloration of 

 most of its species, which would seem rather to unfit them 

 for the cuckoo sort of life that they lead. In most of the 



