146 Psyche [Sept.-Dee. 
20. Gradates converge behind so their bases are near each 
other bouvieri 
Gradates have bases very far apart diver gens 
21. Pronotum as long as broad, with an interrupted red 
stripe each side, not on margin 22 
Pronotum broader than long 23 
22. Pronotum much longer than broad; inner gradates 
nearer to radial sector than to outer, arise at or before penul- 
timate cubital cross vein angusta 
Pronotum only a little if any longer than broad; inner gra- 
dates arise beyond penultimate cubital cross-vein . yucatanensis 
23. Divisory cell ends at or before the cross-vein above; 
cheeks reddish exotera 
Divisory cell ends well beyond the cross- vein above . .24 
24. Cheeks dark; most cross-veins dark at ends; inner 
gradates parallel, each veinlet far from next . . . perfecta 
Cheeks pale; cross-veins not dark at ends; inner gradates 
slightly divergent and each veinlet is close to next . . jorreri 
25. A dark mark in a curve across upper edge of clypeus; 
palpi marked with dark; gradates parallel . . . aztecana 
No dark across on clypeus or face 26 
26. Two dark lines on each basal antennal joint . bilineata 
But one dark line on basal antennal joint 27 
No dark line on basal antennal joint . . . . . . .31 
2 7. Black spot on cheeks; palpi pale 28 
No dark on cheeks; pronotum reddish on sides . . . .29 
28. Radial area not as wide as postcubital area; many cross- 
veins dark gradata 
Radial area about as broad as the postcubital ; posterior half 
of wing with mostly pale veins (except gradates) . indicat a 
29. Inner gradates near to radial sector, gradates not quite 
parallel; many costals wholly dark sarta 
Inner gradates close to outer row and parallel thereto . 30 
30. Some gradates and some branches of radial sector bor- 
dered; pronotum about twice as broad as long . . berlandi 
No gradates nor other veins bordered; pronotum only a little 
broader behind than long, narrowed toward front . . adoina 
31. Palpi partly dark; cubital area as broad as the costal 
