186 U.S. NATIONAL MUSEUM BULLETIN 277 



Abdomen brown, mottled tan. Eighth segment brown, ninth 

 tergite with 7 stiff spines, moderately hairy. See figure for details. 



Length: Male body 3.3 mm., wing 2 mm.; female body 3.5 mm., 

 wing 2 mm. 



Type-locality: Davis, California; 16 August 1955 (J. C. Downey). 



Holotype: Male (UCalD) 76. 



Allotype: Female, Davis, California; 14 August 1955 (A. T. 

 McClay). 



Paratype:l c?', Davis, California; 14 July 1955 (E. I. Schlinger) 

 (UCalD). 



129. Brevitrichia flocki, new species 



Figure 123 



Female. — Head cream; eyes deep red-brown, medium broad post- 

 ocular ridge, with a narrow brown band laterad of the corner of the 

 eye, the two sides separated by median groove behind the ©cellar 

 tubercle; frons broad, with a deep median groove extending from the 

 antenna! base to the median ocellus, bordered by brown bands on 

 either side; frons separated from postocular area by deep grooves 

 extending from the corner of the eye to the median ocellus. Ocellar 

 tubercle red-brown, pollinose; ocelli red. Antennae \vith first two seg- 

 ments red-brown, third deep red-brown; see figure for details on 

 shape. 



Thorax dorsum solid black-brown, with gray pollen and a yellow 

 patch behind the humeral callus; humeral and supra-alar calli white. 

 Scutellum red-brown with cream lateral margins. Pleura with pro- 

 thorax cream; mesanepisternum red-brown with dorsal portion under 

 wings orange; mesokatepisternum red-brown, with a dorsal yellow 

 band. Wings hyaline, granular, veins brown; halter stem brown, 

 knob white. Legs red-brown with knee of femur and base of tibia and 

 tarsus yellow, pollinose. 



Abdomen red-brown, with lighter posterior margins; eighth seg- 

 ment shining, a row of spines along margin of tergum; ninth tergum 

 with 7 stiff spines, and long hairs over most of the surface. See figure 

 for details. 



Male. — Unknown. 



Length: Female body 3.8 mm., wing 2.2 mm. 



Type-locality: Santa Rita Mts., Arizona; 26 June 1940 (R. A. 

 Flock). 



Holotype: Female (USNM) 67485. 



130. Brevitrichia griffini, new species 



Figure 124 



Male.— Head cream; eyes red-brown above, black-brown below; 

 frons extending only half the distance to the median ocellus, with 



