42 THOMAS SAY FOUNDATION 



ch^ta at lower edge of parafacial next to eye, just 

 above the facial impression; above this bristle only a 

 few very small hairs; antenna* nearly as long as the 

 face; arista long and slender, the penultimate joint 

 as long as wide, the last joint somewhat thickened at 

 base, with very short plumosity for hardly half its 

 length, the hairs but little longer than the greatest 

 thickness of the arista ; palpi normal ; proboscis short, 

 fleshy ; eyes bare. Thorax with rather few and strong 

 bristles, nearly bare otherwise, the usual small hairs 

 few and scattered ; the scutellum has but four bristles, 

 — two pairs of marginals. 



Type. — Camptopyga arisiata new species. 



No. 10. Camptopyga aristata n. sp. 



Male. Front of considerable width, .260 of the 

 head (average of three, — .252, .257, .271) ; the stripe 

 velvety black, wider than either side; face and front 

 with plumbeous pollen, not glistening when viewed 

 from below; antennae black, tliird joint one and two- 

 thirds times the second, reaching over five-sixths of 

 the way to the vibrissa ; facial ridges bare ; bucca one- 

 fifth the eyeheight, a little bristly along mouth ; palpi 

 and proboscis black; back of head with three rows of 

 black hairs and not much pale beard; outer vertical 

 bristles large, more than half as long as the inner. 



Thorax gray, thinly pollinose, three black stripes 

 on dorsum; 3 ps dc; 3 stpl; no ant acr; presc very 

 weak; 1 prothoracic; 1 on lower anterior corner of 

 mesopleura; 3 humeral; 2 ant dc (one small). 



Abdomen blackish, club-shaped; when viewed 

 from behind the second, third and fourth segments 

 each have a row of four silvery spots lying against the 

 preceding segment, very distinctive; first and second 

 segments with only a single long lateral bristle each 

 side; third w^ith a very large pair of median mar- 

 ginals, and two lateral each side; fovn-th w^ith mar- 

 ginal row of 12. 



Hypopygium large; first segment brown-black, 

 with row of 6 stout bristles across hind part; second 



