42 THOMAS SAY FOUXDATIOX 



cliceta 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, M^th 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. — Camptopi/ga aristata 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; antenna' black, third joint one and two- 

 tliirds 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 l)ehind 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 ])ristle each 

 side; third with a very large pair of median mar- 

 ginals, and two lateral each side; fourth witli mar- 

 ginal row of 12. 



Hypo])ygium large; first segment brown-black, 

 with row of 6 stout bristles across hind part; second 



