122 
Psyche 
[June-August 
Species of Opacifrons Duda. 
1. Preapical bristle present in the female, absent in the male.. . . 2 
Preapical bristle absent in both sexes 4 
2. Second section of costa distinctly longer than third 3 
Second and third sections of costa equal or nearly so 5 
3. Wings with dark infuscations along all veins with exception 
of last section of third; front with three silvery pollinose 
areas located as follows: one on each side and one directly 
in front of the ocellar tubercle; dorsocentral bristles in 
three pairs; acrostichal bristles distinct; halteres yellow 
Fig. 1 grandis n. sp . 
Wings clear; veins not so marked; front without such 
markings 4 
4. Front, face and cheeks black; interfrontal bristles in four 
pairs, the anterior pair weak; orbital setulse strong, as 
strong as the anterior pair of interfrontal bristles; wings 
clear; veins black; legs black; outer crossvein below 
apical third of last section of second vein; halteres yellow. 
Fig. 10 sciaspidis n. sp. 
Cheeks brownish yellow; legs brownish yellow; outer cross- 
vein below middle of last section of second vein; smaller 
species. 1.5 mm cartagensis Mall. 
5. Lower front, anterior margin of epistome and anterior portions 
of cheeks yellowish; face fuscous; interfrontal bristles in 
three pairs, all three pairs cruciate; wings browned, veins 
blackish; notum opaque, brownish-black; acrostichal 
bristles distinct; halteres yellow. Fig. Q.ccelohata n. sp. 
Lower front opaque black; face and cheeks yellow; inter- 
frontal bristles in four pairs, the upper and lower reduced, 
the middle two pairs cruciate; notum slightly to distinctly 
shining black; acrostichal bristles weak; wing veins pale; 
halteres fuscous. Fig. 8. . pellucida n. sp. 
