66 U.S. NATIONAL MUSEUM BULLETIN 2 77 



quarter of the distance from antenna to ocellus; ©cellar tubercle 

 black-brown, slightly raised; ocelli red-brown. Oral cavity bordered 

 by gray pollinose hairs; mouthparts black-brown, filling oral cavity. 

 Antenna with first segment brown, short; second segment yellow- 

 brown, short; third segment black-brown, elongate, three times as 

 long as 1 and 2 combined. 



Thorax with dorsum black, covered with short hairs that give it a 

 granular appearance; humeral and supra-alar calli red-brown; scutel- 

 lum red-brown, hairy like the dorsum, not distinctly set off from 

 scutum by a deep groove; pleural areas red-brown. Wings brownish, 

 hyaline, veins red-brown, halter stem red-brow^n, knob red-brown, 

 large. Legs with femora and tibiae red-brown, tarsi orange. 



Abdomen red-brown, subshining; see figure for configuration of 

 eighth sternum and bursa. 



Male. — Unknown. 



Length: Female body 3.5+ mm., wing 2.7 mm. 



Type-locality: Darwin, N. T., Australia, 9 March 1916 (G. F. 

 HUl). 



Holotype: Female (USNM) 67455. 



36. Scenopinus evansi, new species 



Figure 36 



This specimen was identified as aS*. balteatus Lamb by van Emden, 

 but the resemblance is superficial and differences in the head, wings, 

 and particularly eighth sternum and bursa remove it from that species. 



Female.^ — Head black; eyes black-brown, extending to back of 

 head; frons slightly ridged from laterad of the antenna bases to the 

 median ocellus, with a small triangular shining spot on the lower 

 third, as wide as ocellar tubercle at its narrowest point. Ocellar 

 tubercle distinct, ocelli orange-red. Mouth-parts two-thirds length 

 of oral opening; palpi round and slim, a little shorter than the rostrum. 

 Antenna red-brown, first segment short; second segment twice as 

 large as the first; third segment oval, 2.5 times as long as broad. 



Thorax with dorsum black; humeral and supra-alar calli orange; 

 pleural areas red-brown. Wings brown-fumose, veins brown; halter 

 stem brown, knob red-brow^n, shining. Legs with coxae through 

 tibiae red-brown, tarsi orange-brown. 



Abdomen red-brown; for details of eighth sternum and bursa see 

 figure. 



Male. — Unknown. 



Length: Female body 3.5 mm., wing 2.9 mm. 



Type-locality: N. Rhodesia (Sylvester Evans). 



Holotype : Female (BMNH) . 



