214 W. H. Patton— Observations on the genus Macropis. 
Macroris Panz. (1809). 
Ocelli in a slight curve; face slightly narrowed beneath; 
clypens 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 maxillz ; labium lanceolate, one- 
third the length of the mentum, the latter narrowing toward 
the base, the paraglosse small; joints of the labial palpi 
decreasing in length successively, the basal joint equal in 
length to the second and third taken together. The flagellum 
in the female sub-clavate, the first joint ovate, the second nar- 
rowed toward the base and one-third longer than the first joint, 
the third and fourth joints equal and when taken together 
shorter than the second joint, the apical joint obliquely tran- 
cate; 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 eac 
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 bulle 
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 
submedial cell. Both sexes have the tarsal claws cleft and a 
distinct enclosure at the base of the posterior tibize. Posterior 
femora of the male swollen; posterior tibise 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 tibize and the 
joint of the posterior tarsi of the female clothed with a short, 
dense probescence upon which the pollen is collected in moist 
masses; basal joint of the posterior tarsi of the male arm 
with a regular comb of long teeth projecting from the inner 
margin of the lower face. Sixth segment of the abdomen of 
the female with a smooth enclosure on the disk. The seventh 
segment in the male with a triangular pyramidal projection on 
the disk, the apex of the projection obtuse, the anterior and 
longest side polished. 
