206 



U.S. NATIONAL MUSEUM BULLETIN 2 77 



Abdomen second segment red-brown, with yellow-brown lateral 

 patches, remaining segments red-brown; eighth segment red-brown, 

 shining; ninth tergum with 5 stiff spines and much anteriorly directed 

 long hair; see figure for details. 



Length: Male body 3.5 mm., wmg 2.3 mm.; female body 4.2 mm., 

 wing 2 mm. 



Type-locahty: 2.5 mi. s. Willcox, Arizona; 29 May 1956 (S. 

 Ordway) on mesquite. 



Holotype: Male (CAS) 8920 (ex [PHT]). 



Allotype: Female 18.2 mi. n.w. Oracle Junction, Pinal Co., 

 Arizona; 6 September 1958 (Timberlake) (CAS) (ex[PHT]). 



141. Brevitrichia pruinosa, new species 



Figure 135 



Male. — Head tan; eyes black-brown, with a metallic green cast 

 above, darker below; frons small, triangular; mouthparts brown, 

 well developed; palpi cream, short; ocellar tubercle black-brown, 

 dusted gray poUinose; ocelli red. Antennae brown. See figure for 

 details. 



Figure 135. — Brevitrichia pruinosa, new species, male: a, wing; b, lateral aspect of head; 

 c, enlarged detail of antenna; d, e, ventral and lateral aspect of terminalia. 



Thorax black-brown, dusted with a central band of brown and 

 lateral bands of gray pollen; humeral and supra-alar calli tan; 

 scutellum black-brown, pollinose above, latero ventral margins yellow. 



