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U.S. NATIONAL MUSEUM BULLETIN 277 



Figure 21. — Scenopinus undulafrons, new species, female: a, wing; b, c, lateral and frontai 

 aspects of head; d, enlarged detail of antenna; e, ventral aspect of 8th sternum;/, lateral 

 aspect of 8th and 9th segments; g, 9th sternum and bursa. 



21. Scenopinus varipes Loew 



Scenopinus varipes Loew, 1873, p. 148. 



This species appears to be lost to science; at least all my efforts 

 to find its whereabouts have been fruitless. 

 Length: Male body 1 mm., wing 1 mm. 

 Type-locaHty : Balfrusch (Babul), Iran; Christoph Coll. 

 Type: Location unknown. 



22. Scenopinus vitripennis Meigen 



Figure 22 

 Scenopinus vitripennis Meigen, 1824, p. 115. — Trojan, 1956, p. 1-10. 



This species has been synonymized with S. glabrifrons by a number 

 of the earlier workers. On the basis of the wing venation, however, 

 Trojan (1956) showed that vitripennis is a valid species. It is most 

 easily identified as a brown haltered glabrifrons-\ike species. The 

 formation of the eighth sternum and bursa further confirm Trojan's 

 evidence that this is a different species; see figure. 



The only known male of this species is presumed lost. 



Specimens identifiable to this species have been found in a number 

 of European collections and come from Eastern Europe. 



Length: Female body 4.5-5.5 mm., wing 3.5-3.7 mm. 



Type-locality: Austria (Megerle). 



Type-specimen: lost. 



