264 



U.S. NATIONAL MUSEUM BULLETIN 277 



Abdomen segments 2-5 black, rugose; segments 6 and 7 black, 

 shining; ninth tergum red-brown, pointed dorsally; aedeagus with 

 large lobes, but with two short wiry median peni; sternal brush of 

 hairs fairly thick; see figure for details. 



Fe m ale . — Unknown . 



Length: Male body 6 mm., wing 3.7 mm. 



Type-locality: Linden, San Joaquin Co., California; 7 August 1953 

 (W. H. Lange). 



Holotype: Male (UCalD) 74. 



177. Pseudatrichia peromysci, new species 



Figure 171 



Male. — Head black; eyes black-brown, black below; frons con- 

 tinuous to median ocellus but narrowed as eyes nearly touch three- 

 fifths of the way from antennae to median ocellus, widening above; 

 ocellar tubercle prominent, ocelli clear. Mouthparts red-brown, 

 three-fourths the length of the oral opening, palpi slender, half the 

 length of oral opening. Antennae black, third segment covered \\dth 

 short pubescence that gives a golden glint. 



Figure 171. — Pseudatrichia peromysci, new species, male, female: a, wing; b, c, lateral 

 aspects of male and female head; d, dorsal aspect of female head; ^, /, enlarged details of 

 male and female antennae; g-i, ventral, lateral and posterior aspects of male termmalia; 

 y, ventral aspect of female 8th sternum and 9th segment; k, lateral aspect of female 8th 

 and 9th segments. 



