W. H. Patton on the Genus Macropis. 289 



diverse groups. With the Andrenoides it agrees in the vena- 

 tion of the anterior wings, which differs from that of Scrapter 

 and Calliopsis in the pointed marginal cell only, in the cleft 

 claws of the female, and in the habit of moistening the 

 pollen as collected. With Andrena it agrees in the form of 

 the tongue and palpi. With the Scopulijiedes it agrees in the 

 short anal lobe of the posterior wings and in general appear- 

 ance. In the form of the basal joint of the posterior tarsi of 

 the female it agrees with none but the social bees, which 

 also have the habit of moistening the pollen as collected. 



Macropis, Panz. (1809). 



Ocelli in a slight curve ; face slightly narrowed beneath ; 

 clypeus not elevated, yellow in the male ; labium transverse, 

 entire ; mandibles stout, obtusely bidentate ; maxillary palpi 

 6-jointed, the sixth and one half of the fifth joints extending 

 beyond the apical lobe of the maxillae ; labium lanceolate, 

 one third the length of the men turn, the latter narrowing 

 toward the base, the paraglossoe small ; joints of the labial 

 palpi decreasing in length successively, the basal joint equal 

 in length to the second and third taken together. The flagel- 

 lum in the female subclavate, the first joint ovate, the second 

 narrowed toward the base and one third longer than the first 

 joint, the third and fourth joints equal and when taken to- 

 gether shorter than the second joint, the apical joint obliquely 

 truncate ; in the male the first joint of the flagellum is globose, 

 the second scarcely longer than the first, the third scarcely 

 one half as long as the second, the fourth about equal in 

 length to each of the following joints, the flagellum not clavate, 

 but longer than in the female. The anterior wings have two 

 submarginal cells, the second receiving both recurrent nervures, 

 the origin of the first recurrent nervure far beyond the origin 

 of the cubital nervure ; the stigma of good size ; submarginal 

 bullae six, two on the first transverse nervure, one on the 

 second, one on the first recurrent nervure, two on the second ; 

 basal lobe of the posterior wings extending beyond the middle 

 of the submedian cell. Both sexes have the tarsal claws cleft, 

 and a distinct enclosure at the base of the posterior tibia?. 

 Posterior femora of the male swollen ; posterior tibiae in both 

 sexes robust ; basal joint of the posterior tarsi of the female 

 quadrate, flattened, the upper angle not produced, the second 

 joint attached at the lower angle ; the posterior tibia? and the 

 basal joint of the posterior tarsi of the female clothed with a 

 short dense pubescence, upon which the pollen is collected in 

 moist masses ; basal joint of the posterior tarsi of the male 



