SCENOPINIDAE OF THE WORLD 207 



Prothorax tan, mesanepisternum red-brown, except below wing tan, 

 mesokatepisterniim red-brown, all pollinose; wings smoky, veins tan 

 (faint); halter stem brown, knob tan; legs with femora red-brown 

 pollinose, tibiae tan, tarsi tan, except brown at tips. 



Abdomen second segment with a broad red-brown anterior margin 

 with a thick median stem without substantial lateral extension, 

 remainder of segment pristine white including posterior margin ; 

 remaining segments essentially white but with anterior and lateral 

 margins red-brown; ninth tergum white, with a red-brown basal 

 patch; see figure for details. 



Female. — Unknown. 



Length: Male body 2.6 mm., wing 1.9 mm. 



Type-locality: Pulpito (anchorage), Baja California, Mexico; 

 20 March 1953 (P. H. Arnaud) Sefton Orca Exped. to Gulf of Cali- 

 fornia. 



Holotype: Male (CAS) 8932. 



Paratypes : 4 cf cf , same data as type (CAS) . 



142. Brevitrichia schlingeri, new species 



Figure 136 



Male. — Head cream; eyes red-brown, with metallic blue-green 

 sheen, darker below; frons very narrow; ocellar tubercle red-brown, 

 pollinose, ocelli red; antennae red-brown; see figure for details. 



Thorax dorsum red-brown, solid except sides, covered with longi- 

 tudinal bands of tan and brown pollen; humeral and supra-alar 

 calli yellow; scutellum red-brown, except lateral margins yellow. 

 Prothorax red-brown below humeral callus, then cream-yellow; 

 mesanepisternum yellow, with a median red-brown patch; meso- 

 katepisternum red-brown, with a yellow dorsal band, pollinose. Wing 

 smoky hyaline, veins tan; halter stem brown, knob cream-yellow. 

 Legs with femora red-brown, pollinose; tibiae yellow-brown; tarsi 

 yellow-brown, darkening to brown distally. 



Abdomen segments all brown with narrow cream posterior bands; 

 ninth tergum cream, with a tan patch basally which extends along the 

 open margin ; see figure for details. 



Female. — Head cream; eyes red-brown, postocular ridge broad, 

 continuing uninterruptedly behind ocellar tubercle, a tan patch 

 along the mid-dorsal portion behind the eyes; frons broad, with a 

 "Y"-shaped orange median stripe and a triangular brown area above 

 the antennae filling the arms of the "Y," a groove extending from 

 the corner of the eye to the back edge of the lateral ocelli. Antennae 

 with two basal segments brown, third segment black-brown: see 

 figure for details. 



