26 Journal New York Entomological Society, t^'o'- X-'^iii- 



Larger, 18-28 mm.; front longer, its sides nearly straight and its base 

 with a nearly horizontal superior area on which the transverse ribs 

 become obsolete ; costa more feebly arcuate i 2 



2. Color rufo-ferruginous with a few marks on the vertex and a dorsal vitta 



on the tergum black 17. arciostaphylcu n. sp. 



Color black, more or less marked with pale or rufous 3 



3. Wing venation dark sanguineous ; surface of body clothed with short 



scale-like hairs 18. rubrovenosa Davis. 



Wing venation black or pale, the costa and base orange or pale ; vestiture 

 of body if present pale 4 



4. Pronotum and disk of the mesonotum dull black, immaculate ; costal edge 



of the corium and commissure of the clavus bright reddish-orange ; 

 wing venation basally, legs and ventral segments in part orange ; length 



2i mm 16. ornata n. sp. 



Hind edge of pronotum pale ; disk of mesonotum with six pale marks, two 

 on the calloused center of the X, two on its anterior points and two 

 before these on the apex of the loops ; all of these marks may be ex- 

 tended or reduced but are rarely absent 5 



5. Pronotum mostly black, when pale with the disk largely black but some- 



times bisected by a pale median line 6 



Pronotum mostly pale with a black median vitta, geminate anteriorly, the 

 lateral oblique grooves more or less broadly black ; four anterior marks 

 on the mesonotum coalescing; elytral venation greenish toward the base; 

 length 25—27 mm 26. vandykei n. sp. 



6. Somber black above with the pale marks much reduced; venter fulvous 



or reddish-orange, immaculate except at base; elytra long; length of 



body 25—27 mm 19. tristis n. sp. 



More broadly marked with pale or if mostly black the venter black or 

 banded with black 7 



7. Larger, 20 mm. or over 8 



Smaller, under 20 mm. ; mostly pale beneath ; elytral venation pale, at 



least at base ; pronotum pale-margined 13 



8. Mostly black, the pale markings greatly reduced and greenish; the black 



body conspicuously clothed with whitish pubescence ; costa narrowly 



greenish ; venter greenish, banded with black 22. canescens n. sp. 



Body when black not conspicuously whitish-pubescent 9 



9. Mostly black above with black elytral venation ; pronotum without pale 



lateral areas 10 



Pale markings much extended with elytral venation mostly pale ; lateral 



areas of pronotum largely pale 12 



10. Length about 28 mm.; surface dull black, closely minutely grey-pubescent; 

 valve of male long (5 mm.) as in rimosa ; uncus oblong, parallel-sided, 



not narrowed toward the truncated apex 20. mariposa Davis. 



Length about 24 mm. ; uncus of male more ovate, broadest near the base 

 and narrowing toward the obtuse apex 11 



