SCENOPINIDAE OF THE WORLD 



213 



red. Antennae with first segment brown, second orange, third orange- 

 brown basally, darkening to black-brown, with short hairs; see figure. 



Thorax dorsum black-brown, with yellow lateral margins; humeral 

 and supra-alar calli yellow, scutellum yellow, with black-brown area 

 covering central third. Prothorax yellow; mesanepisternum yellow 

 with red-brown spot; mesokatepisternum red-brown with yellow 

 dorsal band. Wings smoky, veins tan; halter stem tan, knob cream 

 below, tan above. Legs with femora red-brown, tibiae tan, tarsi tan 

 at base darkening distally. 



Abdomen segments red-brown, with posterior white bands on seg- 

 ments; ninth tergum white, with red-brown spot on basal portion; 

 see figure for details. 



Figure 139. — Brevitrichia yucatani, new species, male, female: a, wing; b, c, lateral aspects 

 of male and female heads; d, e, enlarged details of male and female antennae;/, g, ventral 

 and lateral aspects of male terminalia; h, ventral left and dorsal right aspects of female 

 8th and 9th segments; i, lateral aspect of female 8th and 9th segments; ;', bursal structure. 



Female. — Head lost before descriptions made, last antennal seg- 

 ment orange. 



Thorax dorsum black-brown, heavily dusted with gray pollen, a 

 cream patch behind the humeral callus; humeral callus cream; scutel- 

 lum yellow, with red-brown spot occupying middle half. Pleural areas 

 as in male. Wings dusted brown, veins brown; halter stem tan, knob 

 cream below, tan above. 



Abdomen first four segments red-brown with white posterior bands, 

 rest red-brown. Eighth segment red-brown, shining; ninth tergum 

 with 4 stout spines; see figure for details. 



