CHIRONOMID MIDGES — SUBLETTE 205 



Thorax with a pale yellowish brown ground color; median vittae 

 dark brown; lateral vittae and postnotum blackish-brown. Prealar 

 bristles about 6; dorsolateral bristles in a double row. Scutellum and 

 halteres yellowish white, the former with 2 irregular transverse rows 

 of bristles. Fork of Cu distal to r-m; R 2 +3 and Rj slightly but dis- 

 tinctly separated at apex. R 4 + 5 and M equidistant, terminating 

 slightly before wing apex. Legs light brown, no tarsal beard. 



Wing length 2.GG mm.; leg ratio (.53; antennal ratio 2.0. 



Abdomen light brown; first segment with a thin, slightly oblique 

 longitudinal brown line; segments 2 to 5 with the apical one-third 

 occupied by a dark brown band; segments 6 to 7 almost completely 

 darkened. 



Genitalia of this species is unique among Nearctic Polypedilum in 

 having several bristles beyond the base on the superior appendage. 

 It is very similar to the European cultellatum Goetghebuer (Goethge- 

 buer, 1937). It differs by not having the inferior appendage widened 

 and by having the blade of the superior appendage recurved, not 

 acute. 



Paratype male: Collected with type (USNM). 



Wing length 2.26 mm.; leg ratio 1.6; antennal ratio 1.83. 



Polypedilum (Polypedilum) scalnenum (Schrank) 



Tipula scalaena Schrank, Fauna Boica . ., vol. 3, p. 73, 1803. 



Male: Wing length 1.55 mm.; fore tarsi missing; antennal ratio 

 1.5. The specimen is unusual in lacking the characteristic point on 

 either side of the base of the anal point. In all other respects the 

 individual is normal. 



Females: Wing length 1.59, 2.22 mm. (2); leg ratio 1.58 (1). 



Material examined: In UCLA: 1 male, 1 female, Davis, June 20, 

 1953, A. A. Grigarick; 1 female, Davis, March 30, 1954. M. 



Previous California records: Laguna Canyon, Wirth and Stone, 

 1956, p. 421. 



Polypedilum (Polypedilum) parvum Towncs 

 Polypedilum (Tripodura) parvum Tounes, Amer. Midi. Nat., vol. 34, p. 40, 1945. 



Males: Wing length, range 1.41-1.63; mean 1.56 mm. (3); fore- 

 tarsi and antennae missing. 



Material examined: In USNM: 3 males, Palo Verde, Imperial Co., 

 April 8, 1949, W. 



Polypedilum (Polypedilum) opicatum Tovnes 



Polypedilum (Tripodura) apicalum Townes, Amcr. Midi. Nat., vol. 34, p. 39, 1945. 



Male: Wing length 1.47 mm.; fore tarsi and antennae missing. 

 Female: Wing length 1.66 mm.; fore tarsi missing. 



