192 U. S. NATIONAL MUSEUM BULLETIN 2 09 



4. Last tarsal segment with several bristles beneath; basal external longitudinal 



carina on front coxa strongly curved and ending at about the basal 0.3 of 

 the coxa; a ferruginous species with the wings dark brown, the forewing 9 



to 15 mm. long, coronata group 14. coronata Banks 



Last tarsal segment without bristles beneath; basal external longitudinal 

 carina on front coxa weakly curved and ending near or beyond the mid- 

 length of the coxa; species with at least the thorax blackish; or if ferrugi- 

 nous the forewing 4 to 5 mm. long 5 



5. Abdomen rufous or ferruginous; mesopleuron without an oblique carina at 



the front end of its transverse suture; forewing 4.0 to 5.5 mm. long; brush 

 on inner side of hind tibia subapically very narrow, partita group . 6 

 Abdomen black or blue-black; mesopleuron often with a short oblique carina 

 extending downward from the front end of its transverse suture; forewing 

 5 to 10 mm. long; brush on inner side of hind tibia subapically relatively 

 broad to quite narrow. cupida group 9 



6. Head and thorax fulvo-ferruginous; forewing unusually narrow (0.25 as wide 



as long) 3. pallida Banks 



Head and thorax blackish or mostly so ; forewing of normal width .... 7 



7. Apical hairless margin of clypeus mat, set off from the rest of the clypeus by 



an indistinct groove 4. sexninole, new species 



Apical hairless margin of clypeus polished, set ofif from the rest of the clypeus 

 by a distinct groove 8 



8. Hind femur black or brown; body pubescence not unusually dense. 



1. partita Banks 



Hind femur rufous, its apex a little infuscate; body pubescence very dense, 



giving a hoary appearance 2. grisea, new species 



9. Pronotum and abdomen dull black, without bluish iridescense 10 



Pronotum and abdomen with a distinct bluish iridescense 12 



10. Clypeus with a pair of blunt median apical teeth that are often subobsolete; 



mesopleuron with a short carina extending obliquely downward from the 



front end of its transverse groove 8. vogeli, new species 



Clypeus with a small sharp median apical tooth; mesopleuron without a 

 carina extending obliquely downward from the front end of its transverse 

 groove. SUBSPECIES op obscura 11 



11. All femora black 6a. obscura obscura Banks 



Middle and hind femora dusky rufous .... 6b. obscura delicata Banks 



12. Forewing subhyaline in its basal 0.6, its apical 0.4 weakly infuscate, the wing 



5 to 6.5 mm. long; bluish iridescence of head and bodj^ weak; clypeus with 



a median apical pair of blunt teeth 12. norata Banks 



Forewing uniformly fuscous or the base a little paler, the wing 5.5 to 10 mm. 

 long; bluish iridescence of head and body strong 13 



13. Mesopleuron with a conspicuous carina extending obliquelj' downward from 



the front end of its transverse groove; propodeum with indistinct trans- 

 verse wrinkles; pubescense of clypeus very dense ... 9. cupida (Cresson) 

 Mesopleuron without a carina extending obliquely downward from the front 

 end of its transverse groove; propodeum without wrinkles; pubescence of 

 clypeus not unusually dense 14 



14. Lower half of head with a few (10± on each side) erect whitish to dark 



brown hairs behind; forewing 5.5 to 7.5 mm. long. 



7. euphorbiae (Viereck) 



Lower half of head with numerous (40 ± on each side) erect whitish hairs 



behind; forewing 8.0 to 10 mm. long 15 



