NO. 2344. SUPERFAAIILY TIPULOIDEA— ALEXANDER AND McATEE. S9S 

 Tribe DOLICHOPEZINI. 



KEY TO GENERA. 



1. Tip of vein R-2 atrophied ; Rs vei-y short, transverse, simulating a cross- 

 vein ; second anal vein long, about two-thirds the length oi" the first ; Sc 



moderate in length, ending in R Oropeza (p. 393), 



Tip of vein JSa present, the vein almost perpendicular to R-^s at its origin ; 

 Rs long, strongly arcuated at its origin ; second anal vein very short, about 



one-third the length of the first; Sc very long, ending in C 



Brucliiipremna (p. 394). 



Genus OROPEZA Needham. 



KEY TO SPECIES. 



1. Tarsi, at least, entirely white 2. 



Tarsi yellow or brownish 3. 



2. Digitiform appendages of the male hypopygium short or rudimentary; 



ventral margin deeply and narrowly emarginate 0. albipcs (p. 393). 



Digitiform appendages of the male hypopygium moderate in length; ventral 

 margin broadly emarginate 0. suhalhipes (p. 393). 



3. Halteres with the knobs dark bnr.vn 4.. 



Halteres entirely yellowish O. sayi (p. 393).. 



4. Stripes of the thorax distinct; pleura spotted 0. clorsalis (p. 393). 



Stripes of the thorax obscure; pleura dark 5. 



5. Thorax opaque 0. obscura (p. 393). 



Thorax shining O. obscura polita. 



The above key is adapted from one by Johnson. O. suhalhipes is 

 distinguished with difficulty from 0. albipes. The immature stages 

 of the species of Oropeza are spent in usually dry moss or in soil. 



OROPEZA ALBIPES Johiison. 



Common ; season May 30 to August 25. P. I. 



OROPEZA DORSALIS Johnson. 



Washington, District of Columbia, June 11, 1910, F. Knab; Plum- 

 mers Island, June 19, 1913, at liglit, R. C. Shannon; August 18, 1912, 

 J. R. Malloch. 



OROPEZA OBSCURA Johnson. 



Common; season May IT to August 30; in copula June 7. The 

 variety polita Johnson was taken from a spider's web at Rosslyn,. 

 Virginia, August 25, 1912, F. Knab. P. I. 



OROPEZA SAY! Johnson. 



Plummers Island, July 31, 1912, E. A. Schwarz and H. S. Barber; 

 August 25, 1904, R. P. Currie. 



OROPEZA SUBALBIPES Johnson. 



Specimens identified as this form were taken at Dead Run, Vir- 

 ginia, July 21, 1915, Virginia near Plummers Island, July 14, 1915^ 

 Four-mile Run, Virginia, May 31, 1914, McAtee; June 7, 1914, L. O. 

 Jackson; Beltsville, Maryland, June 9, 1915, June 14, 1914; and 

 Odenton, Maryland, June 20, 1915, McAtee. 



