SCENOPmiDAE OF THE WORLD 227 



eyes; ocellar tubercle prominent, ocelli brown. Mouthparts red-brown, 

 small, half the length of the oral opening, palpi as long as mouthparts. 

 Antennae red-brown, the second segment lighter. See figure for details 

 on shape. 



Thorax dorsum black, transversely striated; humeral and supra- 

 alar calli red-brown; pleural areas dark red-brown. Wings clear, 

 veins brown; halter stem brown, knob with base red-brown, remainder 

 white. Legs with foreleg orange-brown with red-brown tarsus; middle 

 leg orange-brown, a little darker than foreleg; hind leg red-brown, 

 first segment of tarsus orange-brown, remainder darker. 



Abdomen black, rugose, with a metallic sheen; remaining segments 

 black, shining; ninth tergum red-brown, truncated with the ventral 

 margin (upper) shorter; sternal comb sparse; aedeagal parameres 

 large, bulbous with two anteriomesal spurlike processes; see figure for 

 details. 



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

 frons swollen above antennae, with longitudinal and transverse 

 striations, covered with short hairs; ocellar triangle cut off, not 

 distinct, ocelli clear. Antennae as in the male. 



Thorax as in male. 



Abdomen first segment black, rugose, metallic; remaining segments 

 black, shining. Eighth sternum dark red-brown, convex on posterior 

 margins; see figure for details. 



Length: Male body 4.7 mm., wing 3 mm.; female body 5.1 mm., 

 wing 3.2 mm. 



Type-locality: Alamogordo, New Mexico; 15 April 1902. 



Holotype: Male (ANS). 



Allotype: Female Alamogordo, New Mexico; 9 May 1902 (ANS). 



153. Pseudatrichia bakeri, new species 



Figure 147 



Female. — Head black-brown; eyes black-brown; with a broad 

 postocular ridge; frons striated, slightly wider than the ocellar tri- 

 angle; mouthparts very short, brown, not exceeding half oral opening; 

 palpi brown, shorter; ocellar triangle not prominent, cut off, ocelli 

 orange. Antennae with first two segments black-brown, third segment 

 missing. 



Thorax dorsum black, transversely striated; humeral and supra-alar 

 calli red-brown; jileural areas red-brown; wings hyaline, veins brown; 

 halter stem red-brown, knob with red-brown dorsal rib bleeding into 

 white ventral portion. Legs: front legs, femora and tibiae orange, 

 tarsi red-brown; hind leg, basal half of femur orange, remainder of leg 

 red-brown. 



