SCENOPINIDAE OF THE WORLD 247 



segment red-brown, sternum with posterior margin undulating; see 

 figure for details. 



Male. — Unknown. 



Length: Female body 6.5 mm., wing 4.2 mm. 



Type-locality: Keremeos, B.C., Canada; 26 June 1923 (C. B. 

 Garrett) . 



Holotype: Female (CNC) 8633. 



166. Pseudatrichia gracilipennis, new species 



Figure 160 



Male. — Head black, eyes brownish-black above, darker below, a 

 thin postocular flange; frons slightly rounded, with a narrow trans- 

 verse ridge just above the antennae, extending one-third the distance 

 to the ocellar triangle; ocellar triangle prominent, ocelli brown; 

 mouthparts red-brown, two-thirds the length of the oral opening, 

 palpi slender, short, half as long as the mouthparts. Antennae with 

 first segment red-brown, second and third orange-brown; see figure 

 for details. 



Thorax dorsum black, transversely striated, humeral and supra- 

 alar calli with orange-brown spots; pleural areas a very dark red- 

 brown. Wings clear, veins brown; halter stem brown, knob base and 

 dorsal rib brown, remainder white. Fore and middle legs straw colored 

 ^^dth the tips of the tarsi red-brown, the second pair a little darker; 

 hind leg orange-brown. 



Abdomen second segment to the base of fifth dull black, rugose, 

 remainder of fifth through seventh shining. Ninth segment black, 

 tergum very pointed, sternal comb of hairs straight; aedeagus without 

 large knobs; prongs long, thin; see figure for details. 



Female. — Unknown. 



Length: Male body 6.5 mm., wing 3.5 mm. 



Type-locality: Davis, California; 23 June 1952 emerged 27 

 September 1952 (E. I. Schhnger and R. C. Bechtel). 



Holotype: Male (UCalD) 73. 



167. Pseudatrichia howdeni, new species 



Figure 161 



Female. — Head black, longer than high; eyes black with red 

 glints; postocular flange narrow; frons half the width of the ocellar 

 triangle, transversely striated; ocellar triangle flat, not cut off, ocelli 

 clear. Mouthparts well developed, base brown, tip yellow; palpi 

 yellow. Antennae with first two segments red-brown, third segment 

 orange, notched at tip ; see figure for details. 



