202 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



Paratendipes thermopliihis Townes 

 Figure 1,6 



Paratendipes thermophilics Townes, Amer. Midi. Nat., vol. 34, p. 31, 1945. 



The superior appendage of the genitalia in this species usually 

 appears somewhat abbreviated because of the point being oriented 

 dorsally. Figure 1,6, shows a variation in appearance, due to mounting 

 technique, where the point of the superior appendage is fully appressed 

 on the slide. 



Males: Wing length 1.63, 1.59 mm. (2) ; fore tarsi missing; antennal 

 ratio 1.51 (1). 



Material examined: In UCLA: 1 male, Saratoga Springs, Death 

 Valley, May 28, 1955; 1 male, Kesting Springs, Inyo Co., May 29, 

 1955. 



Paralaiiterborniella subcincta subclncta (Townes) 



Apedilum subcinctum Townes, Amer. Midi. Nat., vol. 34, p. 33, 1945. 



Males: Wing length, range 1.04-2.11; mean 1.48 mm. (61); leg 

 ratio, range 0.95-1.36; mean 1.1 (33); antennal ratio, range 0.78-1.9; 

 mean 1.28 (39). 



Female: Wing length, range 1.29-1.55; mean 1.39 (7); leg ratio, 

 range 1.0-1.17; mean 1.07 (7). 



This is an exceedingly variable species which probably forms a 

 North-South cline. The thorax varies from dark brown to black while 

 the abdomen presents even greater differences. Some of the abdom- 

 inal color patterns by locality are as follows : Davis : Segments 1 an d 

 2 entirely dark brown; segments 3 to 5 with a narrow yellowish green 

 posterior border, or segments entirely dark with only faintly lighter 

 posterior margins. Rio Linda: Anterior half of tergites 1 to 4 brown; 

 posterior half pale yellow. Resting Springs, Saratoga Springs, Death 

 Valley: Abdomen largely pale green (fading to yellow or pale brown), 

 occasionally with dorsum slightly infuscate. 



The anal point of the male genitalia presents much variation due to 

 differences in mounting technique. Not infrequently the anal point 

 is obscured and in a few instances, particularly if lateral distortion 

 has occurred, the point cannot be seen. 



Paralaiiterborniella elachista (Townes) may be a synonym of this 

 species. I have examined the type at the U.S. National Museum but 

 cannot be certain without additional topotypic material that the 

 species actually lacks an anal point. 



Material examined: In Darby: 16 males, 7 females, Rio Linda, 

 July 19, Sept. 22, 1957, D. In USNM: 4 males, Lee's Lake, Chat- 

 worth, Los Angeles, July 25, 1950, B; 1 male, Saratoga Springs, 

 Death Valley, May 30, 1953, B; 5 males, 3 females, June 16, 19, 1954, 



