14 



R. OSTEN SACKEN 



angularly rounded, without appendage; this vein, beyond the 

 elbow, has a hardly perceptible curvature; posterior crossvein 

 strongly bisinuate. 



Xlrodexia, peiiieilliiin n. sp. 



Face, cheeks and posterior orbits grayish-silvery; the frontal 

 and facial orbits dull golden; frontal stripe black; antennae 

 grayish-pollinose , with a brown ground color; base of third 

 segment and of the arista reddish ; tip of the proboscis and 

 palpi brownish-yellow; cheeks and posterior orbits with a soft, 

 whitish-gray pubescence. Thoracic dorsum dull golden-yellow, 

 with four black stripes interrupted by the suture and not rea- 

 ching the scutellum; the lateral stripes are also interrupted in 

 front. Pleurae and front coxae grayish pollinose. Scutellum 

 velvet-black ; the tip with a yellowish-gray pollen. Abdomen : 

 first segment black, with yellowish sides; the second brownish- 

 yellow with a slight dull golden-yellow pollen above and a 

 hoary one on the venter; the hind margin of this segment is 



