SCENOPINIDAE OF THE WORLD 265 



Thorax dorsum black, transversely striated; humeral and supra-alar 

 calli red-brown; pleural areas black to red-brown. Wing clear, veins 

 dark brown; lialter stem black-brown, knob with black-brown base 

 and dorsal rib, onl}" a small portion of white below. Front and middle 

 legs, coxae to tibiae orange-brown, tarsi black-brown; hind leg, coxa 

 to tibia red-brown, first segment of tarsus orange-brown grading into 

 black-brown. 



Abdomen segments two through four black, punctured, with a 

 metallic sheen; remaining segments more shining. Ninth tergum 

 black, rounded but rough dorsally, receding ventrally; peni orange, 

 sternal brushes thick; see figure for details. 



Females. — Head black; eyes black-brown, postocular flanges 

 broad, shining; frons subshining, swollen above antennae, a median 

 cleft bordered by striations, striations on upper frons radiating 

 from median ocellus; ocellar triangle red-brown, not cut off, ocelli 

 clear. Antemiae as in male. 



Thorax as in male except knob of halter has much more white 

 than male. 



Abdomen as m male; eighth sternum orange-brown, deeply concave 

 on posterior margin with two rounded lateral lobes; see figure for 

 details. 



Length: Male body 4.5-5 mm., wing 2.5-3.1 mm.; female body 

 4.3-4.5 mm., wing 2.5-2.7 mm. 



Type-locality: 3.5 mi. s., 10.2 mi. w. Arbuckle, Colusa Co., 

 California; 15 January 1959 (A. M. Barnes) reared from larvae. 



Holotype: d" (USNM) 67463. 



Allotype: 9 same data (USNM). 



Paratypes: 5 cf c?', same data as type; 1 cT, 6.8 mi. s. 0.2 mi. w. Placer- 

 ville, Eldorado Co., California, 14 January 1959 (A. M. Barnes); 

 1 cf , 12.0 mi. s. Grass Valley, Nevada Co., California, 14 January 

 1959 (all collected as larvae from nests of Neotoma peromyscus and 

 reared out); 1 9 , 3.5 mi. n.e. Lompoc, Santa Barbara Co., California, 

 9 February 1961 (A. M. Barnes) as third instar larva (AMB) and 

 (USNM). 



178. Pseudatrichia punctulata D. E. Hardy 



Figure 172 



Pseudatrichia punctulata D. E. Hardy, 1944b, p. 104. 



This species, described by Hardy, was only partially figured by him 

 and a complete set of figures of the male and female terminaUa are in- 

 cluded here. The male of this species as well as P. longiventris is 

 notable for the sharply constricted seventh abdominal segment so 

 clearly illustrated by Hardy and in the sharply hooked aedeagal spines 



