294 U.S. NATIONAL MUSEUM BULLETIN 2 77 



Thorax compressed, dorsum black with brilliant green and purple 

 metallic glints, prescutellar area depressed, lateral margins of dorsum 

 and pleural areas with sparse, white bulbous hairs particularly dense 

 above the humeral callus; humeral and supra-alar calli light brown; 

 scutellum black with purple glints. Wings hyaline, veins brown; 

 halter stem brown, knob red-brown, velvety. Front and middle legs 

 with femora and tibiae yellow, tarsi red-brown; hind legs missing. 



Abdomen segments red-brown, eighth segment elongate, tapered; 

 see figure for details of sternum and bursal plate. 



Male. — Unknown. 



Length: Female body 4 mm., wing 2.3 mm. 



Type-locality: Temba, Tagant Mauriton (Chad), (J. Mateu) on 

 Acacia scorpiodes. 



Holotype: Female (MNHN). 



Genus Seguyella, new genus 



Type-species Omphrale galactica Seguy. The genus Seguyella re- 

 sembles members of the genus Scenopinus but differs in venation of the 

 wing, male and female terminalia, and in having a notched third 

 antennal lobe. Vein R5 extending straight from the cross vein to before 

 the tip of the wing and vein Ml + 2 parallel or slightly diverging to end 

 in the wing margin well behind the tip of the wing. Vein M3 + Cul 

 short or missing beyond m cross vein. The members of this genus are 

 found in the Ethiopian and Oriental regions. 



Key to the Species of Seguyella 



1. Males, eyes contiguous along midline, wings hyaline 2 



Females, eyes separated by broad frons, wings brown 3 



2. Halter knob brown, elongate, abdomen with dorsal portion of segments 3-7 



white, terminalia black S. galactica (S^guy) 



Halter knob red-brown, shining, rounded, abdomen with dorsal portion of 

 third segments red-brown, segments 4-7 white, terminalia red-brown 



S. turneri, new species 



3. Thorax black covered with small flat gray scales, halter knob orange-brown, 



wing black-brown, abdomen red-brown covered with flat gray scales (India) 



S. chinchona, new species 



Thorax red-brown pollinose, halter knob tan poUinose, wing smoky brown, 



abdomen red-brown, granular S. turneri, new species 



196. Seguyella chinchona, new species 



Figure 190 



Female. — ^Head black, higher than long; eyes black-brown; frons 

 shining, width of ©cellar triangle below and flaring dorsally around 

 ocellar triangle to back of eyes; ocellar tubercle black, pollinose with 

 red-brown oceUi; oral opening covered with silvery pile which extends 



