psilopus. 281 



tibia, the following joints of a decreasing length, the fifth joint 

 infuscated. The slender middle tarsi nearly once and a-half the 

 length of the tibia? ; their first joint distinctly shorter than the 

 tibia ; the following ones of decreasing length, the last one some- 

 what infuscated. Hind tarsi about three-fourths the length of the 

 tibia? ; their first joint longer than the following taken together ; 

 these are of a decreasing length, somewhat infuscated, still only 

 the last is really brown. The pubescence of all the feet is of a 

 rather striking shortness ; its color upon the under side of the tibia? 

 and tarsi is not black, although they take the appearance of this 

 color in some reflected light. Halteres pale-yellowish ; tegula? with 

 an exceedingly narrow black border and with yellowish-white cilia. 

 The third longitudinal vein of the wings curved gently backwards 

 at its tip ; the anterior branch of the fourth longitudinal vein 

 diverges from it under a rather acute angle and turns then at a 

 rounded right angle towards the margin, which it reaches imme- 

 diately before the extreme apex, near the tip of the third longi- 

 tudinal vein ; the hind transverse vein very oblique, little inflected. 

 Hab. Middle States. (Osten-Sacken.) 



/S. Middle coxae gray with yellow tip. 



19. P. psittacinus Loew. % and £. — Aureo-viridis, modice nitens, 

 proboscide, palpis, duobus primis antennarum articulis, abdominis basi, 

 ventre, coxis anticis posticisque et pedibus flavis, coxis intermediis cine- 

 reis, in apice flavis. 



% . Alarum costa concava, breviter ciliata. 



9 . Alarum costa nee concava, nee ciliata. 



Golden-green, moderately shining, proboscis, palpi, the two first joints of 

 the antennae, the basis of the abdomen, the venter, the fore and hind 

 coxas, as also the feet, yellow ; the middle coxae gray with yellow tip. 



% . The anterior margin of the wings concave, with a fringe of short cilia. 



9 . The anterior margin of the wings neither concave nor ciliated. Long. 

 corp. 0.20—0.22. Long. al. 0.19—0.20. 



Syn. Psilopus psittacinus Loew, Neue Beitr. VIII, 96, 16. 



Male. Golden-green, moderately shining. Proboscis and palpi 

 yellow, Face greenish-blue, closely dusted with yellowish-gray, 

 reaching much downwards, without hairs. The two first joints 

 of the antenna? yellowish, the second with very short minute black 

 bristles. The arista dorsal, moderately long. Front blue or 

 bluish-green, with a grayish-yellow or nearly whitish dust, without 



