SCENOPINIDAE OF THE WORLD 



149 



cavity, upper half of froiis with an elongate median depression; ocellar 

 tubercle prominent, ocelli red-orange; mouthparts brown, well devel- 

 oped, extending the length of the oral cavity; palpi nearly as long as 

 rostrum; a narrow gena on lower part of the head. Antennae black- 

 brown, first segment small; second segment twice as large as first; 

 third segment twice as long as wide, slightly tapering, covered with 

 short golden hairs. 



Thorax dorsum black, with a patch of silvery pile above the humeral 

 callus which has a red-brown posterior margin, supra-alar callus red- 

 brown; pleural areas black-brown. Wings smoky hyaline, veins light 

 brown anteriorly fading posteriorly; halter stem brown, knob red- 

 brown. Legs red-brown except tarsi straw yellow, fore tibia a little 

 lighter than others. 



Figure 100. — Scenopinus rossi, new species, male, female: a, wing; b, c, lateral and frontal 

 aspects of male head; d, e, lateral and frontal aspects of female head;/, g, enlarged details 

 of male and female antennae; h-j, ventral, lateral and posterior aspects of male terminalia; 

 k, ventral aspect of female 8th sternum; /, lateral aspect of female 8th and 9th segments; 

 m, female 9th sternum and bursa; n, sketch showing central peg in membranous portion 

 of bursa. 



Abdomen red-brown, segments 3-5 with narrow white posterior 

 bands. For details of ninth tergum and genital structure, see figure. 



Female. — Head black-brown; eyes red-brown with a narrow 

 postocular band; frons broad, slightly rugose, subshining, swollen 

 above the antennae and with a broad median depression on the lower 

 fourth; ocellar tubercle broad and not prominent, median ocellus 

 sunken, ocelli whitish to orange. Mouthparts and antennae as in the 

 male. 



