AKT. 19 AMERICAN MUSCOID FLIES ALDRICH 27 



will be rctiuned to tho Vienna Natural History Museum. The lat- 

 ter specimen has faded so the pollen of the head is almost silvery 

 and the calypters are Avhitish yellow, but in other details agrees 

 perfect l3\ 



T'?//?^'.— Male, Cat. No. 41.082, U.S.N.M. 



127. COPECRYPTA NITENS Wiedemann 



Taclmm nitens Wiedemann, Auss. Zwt-ifl., vol. 2. 1830. p. 294. 

 Cuphoccra nitons Schiner, Novara Reise, 1868, p. 330. 



One female specimen. '' Brasilia, Coll. AVinthem." which has lost 

 one wing. It is labeled as type and agrees with Wiedemann's de- 

 scription and Schiner's comments. 



It is clear that the connnon form in the United States, ruficauda 

 Van der Wulp, type of the genus, can not be more than a variety 

 of this, and I consider it a synonym. Wiedemann's specimen has 

 darker antennae than usual, all the joints being decidedly brown 

 except the tip of second and broad base of third. Tlie abdomen is 

 only very slightly red at tip and vaguely in certain lights on second 

 and third segments, not so definitely as indicated by Schiner. These 

 differences can be almost or quite matched in northern specimens 

 of mfcauda. The antennae in nitens type are of the usual form 

 in females of ruficauda, the third joint only a little longer than the 

 second, widening gradually and subtruncate at tip. There are two 

 parafacial bristles on one side, one on the other. I see no structural 

 differences between the two forms except as noted. 



128. ARCHYTAS PILIFRONS Schiner 



Echinomyia pilifrons Schineb, Novara Reise, 1868, p. 331. 



One male marked as type and agreeing with the description. The 

 locality label is " Novara R. S. America," but Schiner says it is 

 from Chile. The species is represented in the United States National 

 Museum by five specimens, as follows: One male, Southern Chile 

 (M. J. Rivers) ; one male, Angol, Chile (D. S. Bullock) ; two males 

 and one female, Chile (E. C. Reed). 



In brief, the species is close to Archytas piliventris Van der Wulp, 

 a common species in the Tropics, but differs in having the hairs of 

 the parafacials black and the posterior half or more of abdominal 

 segments two to four shining. It has the same median erect trans- 

 parent membrane on the back of the penis as in piliventris, which 

 hitherto has been the onh^ Archytas in the National Museum having 

 this peculiarity. With Schiner's description and these items the 

 species should be recognizable. 



