46 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



5. Hind tarsi with all segments more or less deeply infuscated, apices of basal 

 four segments usually narrowly yellow, the distinction most easily seen 



when tarsus is viewed from apex against the light 6 



Hind tarsi either entirely yellow or with only apical and rarely basal 

 segment partly browned 8 



6. Basal four segments of flagellum without raised line; antennae black, only 



apical flagellar segment yellowish below ; West Indies. 



atricornis, new species 



At most basal two segments without a raised line ; flagellum conspicuously 



yellow on almost entire length below ; United States 7 



7. Apical and basal two segments of flagellum without raised line, latter 



complete on all except preapical segment, and very fine, not darkened or 

 shining; eps 2 alutaceous and with rather small punctures, eps 1 more 

 definitely alutaceous and with larger punctures, more granulose than 



striate on posterior third sayi (Rohwer) 



Only basal segment of flagellum definitely without raised line, apical 

 segment with a trace of one, the elevation broader than in sayi, on no 

 segment extending completely along its length, darker than remainder of 

 segments and slightly shining ; eps 2 coarsely rugoso-reticulate, eps 2 more 

 coarsely and closely punctate than in sayi and with posterior third rather 

 coarsely striate littoralis, new species 



8. Third ventral segment of abdomen not nearly half as wide on exposed part 



of its anterior margin as long in center ; stigma pale yellow ; occipital 

 carina very much more elevated than usual, not vertical, and with a 

 well-defined notch in the center below (pi. 2, fig. 30). 



pallidistigma, new species 



Third ventral segment of abdomen much wider at anterior margin, exposed 



part much over half as wide as the central length of segment ; stigma 



dark ; occipital carina normal, moderately elevated and vertical 9 



9. Flagellum with segments 5 to 8 quite distinctly, almost angularly, elevated 



on one side, highest point close to middle of each segment (pi. 2, fig. 31) ; 

 propodeum laterad of enclosure very finely sculptured, striate or slightly 

 reticulated, appearing almost granulose except under a high-power lens. 



angulicornis, new species 



Flagellum with less evident elevations on intermediate segments, when 



these are visible in profile the highest point is well beyond the middle of 



segments ; propodeum with coarser rugoso-reticulate sculpture laterad of 



enclosure (pi. 2, fig. 32) 10 



10. Mesonotum with greater portion of its surface transversely and deeply 



striato-punctate, the scutellum longitudinally striato-punctate ; head be- 

 tween ocelli and occipital carina finely but distinctly transversely 



striate 11 



Mesonotum deeply and subcontiguously punctate, without distinct transverse 

 striae, scutellum with greater part of its surface rather finely punctate ; 

 back of head not striate 12 



11. Legs except coxae fulvous-yellow ; basal two segments of abdomen including 



petiole red, petiole castaneous rufibasis, new species 



At least hind femora partly and entire petiole black- marginata, new species 



12. Enclosure as in plate 2, figure 33 tibialis (Cresson) 



Enclosure as in plate 2, figure 34 aerofacies, new species 



13. Hind tarsi largely fuscous, yellow only at extreme apices of basal four seg- 



ments, which pale color is best seen when tarsus is viewed from tip 



against the light 14 



Hind tarsi yellow, sometimes with apical segment browned above 17 



