SCENOPINIDAE OF THE WORLD 191 



base to medium ocellus, with a small brown dash at peak; ocellar 

 triangle black-brown, pruinose; ocelli red; a narrow postocular rim 

 laterad of ocellar tubercle. Antennae with first segment brown, second 

 segment red-brown, third segment brown. See figure for details. 



Thorax dorsum black-brown, heavily dusted pruinose, a yellow 

 spot above humeral callus; sides of dorsum yellow, two crescent- 

 shaped yellow areas extending from lateral angles of scutellum, 

 nearly meeting but leaving a continuous black line down the midline; 

 humeral callus cream, with a dark band dorsally. Scutellum yellow 

 with a large median brown spot. Pleural areas dark brown ventrally, 

 yellow dorsally. Wings smoky, veins brown; halter stem brown, 

 knob cream to tan. Legs with femora red-brown, dusted pruinose; 

 tibiae and tarsi orange, darkening to red-brown distally. 



Abdomen with terga red-brown anteriorly, with a central stem 

 and lateral arms in the form of a "T," remainder of segments white; 

 this pattern narrows posteriorly; ninth tergum brown basally, cream 

 distally. See figure for details. 



Female. — Head cream, eyes red-brown, postocular rim moderately 

 wide, unmarked, with short brown hairs, the two halves divided on 

 the midline behind the ocellar triangle; frons broad, with a brown 

 median patch on upper two-thirds, covered with short hairs; upper 

 part of frons cut off by shallow grooves extending from the corners of 

 the eyes to just behind the ocellar triangle; ocellar triangle black- 

 brown, dusted gray pruinose, ocelli red-brown. 



Thorax dorsum red-brown, dusted gray pruinose, marked with 

 extensive areas of yellow above the humeral callus, along the margins 

 above the wing and the central postnotum, extending anteriorly as 

 two thin bands; humeral callus cream; scutellum yellow with a median 

 red-brown spot. Pleura red-brown ventrally, yellow above. Wings 

 hazy brown, veins brown anteriorly becoming faint posteriorly; 

 halter stem brown, knob cream. Legs with femora and tibiae red- 

 brown; tarsi with first segment orange, remainder red-brown, dusted 

 gray pollinose. 



Abdomen with first three segments red-brown, with thin white 

 membranous margins, next three segments tan; eighth segment red- 

 brown; ninth tergum with 8 stiff spines; see figure for details. 



Length: Male body 3.6 mm., wing 2 mm.; female body 4.1 

 mm., wing 2.5 mm. 



Type-locality: Mesilla (near Las Cruces), New Mexico; 25 May 

 1897 (T. D. A. Cockerell). 



Type: (USNM) 4712. 



Material seen: 1 cT, Las Cruces, New Mexico, 16 June 1917 

 (J. M. Aldrich); 1 cf , 2 99, 1 mi. w. Lajitas, Brewster Co., Texas, 



