220 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



Tendipes (Dicrotendipes) nervosus (Staeger) 



Chironomus nervosus Staeger, Naturhist. Tidsskr., vol. 2, p. 567, 1839. 



Males: Wing length, range 2.22-2.96; mean 2.57 mm. (6) ; leg ratio, 

 range 1.47-1.58; mean 1.53 (4) ; antennal ratio, range 2.63-3.13; mean 

 2.93 (5). 



Intersex: Wing length 2.18 mm.; leg ratio 1.7. This individual 

 was apparently parasitized by a mermithid nematode as indicated by 

 the swollen abdomen. Most body features were those of the female 

 except that the genitalia were those of the male, reduced in size. 



Material examined: In Darby: 2 males, 1 intersex, Rio Linda, 

 June 20, Sept. 3, 1957, D. In USNM: 1 male, Clear Lake, Lake 

 Co., Oct. 11, 1947, W; 2 males, Oceano Beach, San Luis Obispo Co., 

 Aug. 20, 1948, W; 2 males, Sunol, Alameda Co., Nov. 2, 1947, R. 

 Coleman; 2 males, W.M. on 1 slide, Nice, Oct. 1938, Lindquist and 

 Roth; 1 male, Orosi, Tulare Co., June 5, 1947, W; 1 male, Heather 

 Lake, Sequoia National Park, 9,000 ft., Aug. 9, 1947; 1 male, Rockwell 

 Pond, Selma, Aug. 4, 1947, W; 1 female, Oso Flaco Lake, San Luis 

 Obispo Co., June 23, 1948, W. In UC, Davis: 1 male, Davis, Apr. 3, 

 1949, R. C. Bechtel. 



Previous California records: Lake Tahoe, Townes, 1945, p. 108. 



Tendipes (Cryptochironomus) chaeioala, new species 



Figure 2,b 



Holotype male: USNM 04716, Lee's Ranch, Chatworth, Los 

 Angeles, July 25, 1950. 



Head greenish, the color more intensified on the occiput; pedicel of 

 the antenna yellowish, flagellum infuscate brown. 



Thorax largely yellowish -brown, the anterior pleural areas pale 

 green; prealar bristles 4 to 5; dorsolateral bristles in partial double 

 row; halteres yellowish; scutellum pale green with 12 erect bristles in 

 a straight transverse row (para type) ; wing membrane with sparce 

 macrotrichia at tips of cell R4+5 and M, the hairs in R4+5 extending 

 more than half the way to the base; squama well fringed; hind tibial 

 combs close together, the inner spine slightly longer than the outer; 

 no beard; femora and tibiae stramineous, tarsi darkened, the foretarsi 

 more so. 



Wing length 1.85 mm.; leg ratio 1.52; antennal ratio 2.14. 



Abdomen light green. 



Genitalia very similar to potamogeti (Townes) but differs in mode 

 of attachment of the anal point and in details of structure of the 

 superior appendage. 



Paratypes: In UCLA and USNM: 4 males collected with the 

 holotype; 2 males collected at type locality, Aug. 10, 1950; 1 male, 



