244 U.S. NATIONAL MUSEUM BULLETIN 277 



parts dark red-brown, well developed; palpi over half the length of 

 oral opening. Antennae with first two segments black, third segment 

 black-brown; see figure for details. 



Thorax dorsum black, with transverse striations ; humeral and supra- 

 alar calli red-brown; pleural areas red-brown. Wings clear, veins brown; 

 halter stem brown, knob with base and dorsal rib brown, remainder 

 cream. Front and middle legs orange-brown with brown tibiae, hind 

 leg with all segments red-brown. 



Abdomen segments 2-5 black, rugose, with a metallic purple sheen ; 

 remaining segments black, shining. Eighth segment dark red-brown, 

 sternum slightly convex on posterior margin; see figure for details. 



Male. — Unknown. 



Length: Female body 6 mm., wing 3.8 mm. 



Type-locality: Evergreen, Colorado; 5 August 1941 (M. T. James). 



Holotype: Female (USNM) 67549. 



Paratype: 1 9, Evergreen, Colorado; 21 July 1942 (M. T. James) 

 (CSU). 



164. Pseudatrichia evergreeni, new species 



Figure 158 



Female. — Head black; eyes brown-black; postocular rim broad; 

 frons wider than ocellar triangle, swollen above the antennae, striated ; 

 ocellar tubercle prominent, set off, ocelli clear; mouthparts brown, well 

 developed ; palpi very slender, half as long as the oral opening. Anten- 

 nae with first two segments red-brown, third segment blunt, black- 

 brown with a golden sheen from fine hairs; see figure for details. 



Thorax dorsum black, transversely striated; humeral and supra- 

 alar calli red-brown; pleura dark red-brown. Wings clear, veins brown; 

 halter stem brown, knob base brown, remainder including dorsal rib 

 white. Front and middle legs red-brown, hind legs dark red-brown. 



Abdomen segments 2-5 black, granular, with a metallic sheen; 

 6 and 7 shining; eighth segment black, posterior margin of sternum 

 convex with a shallow depression in middle third; see figure for details. 



Male. — Unknown. 



Length: Female body 7 mm., wing 4 mm. 



Type-locaHty: Evergreen, Colorado; 21 July 1942 (M. T. James). 



Holotype: Female (USNM) 67461. 



Paratype: 1 9, Evergreen, Colorado; 3 August 1941 (M. T. James) 

 (CSU). 



165. Pseudatrichia garretti, new species 



Figure 159 



Female. — Head red-brown; eyes black-brown; postocular flange 

 flat, moderately broad ; frons swollen, wider than ocellar triangle, with 

 grooves extending from laterad of the antennae to the median ocellus. 



