56 
19. 
Psyche 
[Sept.-Dee. 
20 . 
21 . 
22 . 
23. 
24. 
25 . 
out tooth. Subepaulet bare, without piacrotrichia. 
Body with some metallic green scales Lepiselaga. 
Subepaulet bare, without macrotrichia, rarely with a 
few macrotrichia either restricted to a small area or 
much more scattered than on the base of the costa 20. 
Subepaulet wholly covered with appressed macrotrichia, 
like the base of the costa. Frontal callus present. 
Labella fleshy, without shiny, sclerotized areas 25. 
No frontal callus. Labella short, with sclerotized, 
smooth and shiny areas. Body green or greenish in 
life Chlorotabanus. 
F rontal callus present 21. 
Third antennal segment of four divisions (only three 
well-marked annuli). Frons very broad; callus trans- 
verse, swollen, narrower than frons. Vertex of female 
with a small shiny area. Face with two deep, shiny 
pits Br achy tab anus. 
Third antennal segment of five divisions (four terminal 
annuli); if some are partly fused, either frontal cal- 
lus as wide as frons, or vertex of female without shiny 
area, or face without deep, shiny pits 22. 
Eyes pilose or pubescent in both sexes. Frons relatively 
wide, less than five times as high as wide, with a 
broad callus Agelanius. 
Eyes bare in both sexes 23. 
Vertex of female with a well-marked tubercle. Frons 
relatively narrow, at least five times as high as wide, 
with elongate callus. Labella fleshy or membranous, 
without shiny, sclerotized areas Stenotabanus. 
Vertex of female without tubercle, rarely with a small 
flat, denuded area; in doubtful cases, frons much 
broader 24. 
Body unicolorous, more or less greenish or pale yellow 
in life. Frontal callus elongate. Labella with scle- 
rotized, shiny areas Cryptotylus. 
Body not greenish, usually with contrasting markings. 
Frontal callus as a rule wider than high and as wide 
as frons. Labella fleshy or membranous, without 
shiny, sclerotized areas Phceotabanus. 
Vertex of female with a more or less prominent, de- 
nuded tubercle, sometimes with traces of ocelli. Eyes 
bare or pilose 26. 
