- 3 - 



black, exepting the pleurotergites; a narrow biack girdle on pleura; 

 femora black with a broad, diffuse, pale, subterminal ring; wings 

 with a heavy dark brown pattern; intermediate abdominal segments 

 black, the apical half of each orange-yellow. 



Maie. — Length about 10 mm.; wing 11.3 mm. 



Female. — Length 12.5 mm.; wing 14 mm. 



Rostrum and palpi black. Antenne black, the base of the first 

 flagellar segment obscure yellow. Head brown with a large blackish 

 area on either side of the vertex immediately behind the eyes, separa- 

 ted by a narrow brown médian line. 



Pronotum golden-yellow, conspicuously brownish black medially. 

 Mesonotal praescutum golden-yellow with three brownish black 

 stripes, the broad médian stripe entire, the short latéral stripes sub- 

 confluent with the former; latéral margins of the sclerite broadly 

 golden-yellow; scutum black, indistinctly paler medially at the base; 

 mediotergite of postnotum black. Pleura golden-yellow with a narrow, 

 transverse black girdle extending from above the mesocoxa dorsad 

 to the wing-root, becoming confluent with the coloration of the scu- 

 tum; the pale coloration behind this girdle is less distinctly golden 

 than the cephalic régions, this including the pleurotergites of the 

 postnotum; base of the haltères inserted in a small black area. Hal- 

 tères obscure yellow, the knobs conspicuously dark brown. Legs 

 with the middle and posterior coxae and trochanters dark; fore coxse 

 and trochanters yellow; femora black, with a very broad but diffuse 

 pale ring before the equally broad apex; bases of the fore and middle 

 femora pale, posterior femora uniformly black; remainder of the 

 legs black. Wings with a faint brownish tinge, the costal région dark 

 brown; apex and posterior margin conspicuously seamed with brown, 

 cord and longitudinal veins beyond it rather broadly infuscated; 

 stigma oval, dark brown, hairy; veins brownish black. Venation : 

 Sc2 a short distance beyond the fork of Rs. 



Abdomen with the second tergite pale; tergites three to six with the 

 basai half black, the apical half conspicuously pale orange-yellow, 

 the médian area indistinctly infuscated; tergite seven uniformly 

 black; tergite eight black, the caudal third orange; hypopygium orange; 

 sternites approximately similar but the colors less distincly con- 

 trasted. 



