370 NEW YORK STATE MUSEUM 



widened below into a crossbar, a prong invading the orbital 

 area on each side; sih'ery pubescent on occipital margin; pro- 

 boscis black, brownish at the tip, palpi black; antennae cinere- 

 ous, with short silvery pubescence, the two basal joints longer 

 than the following joints, which are nearly equal in length; 

 occiput cinereous with silvery pubescence around the margin, 



Thorax cinereous, mesoscutum entirely covered with silvery 

 pubescence, with two dorsal lines and usually a fainter median 

 line between them; pleurae fulvous posteriorly, scutellum black, 

 silvery pubescent. Abdomen light fulvous sparsely covered 

 with short silver pubescence. Second, third and fourth seg- 

 ments above with a brown cross band shading to darker on the 

 sides and in the middle, particularly on the third and fourth 

 segments, remaining segments with a broad, median, dorsal, 

 cinereous band, bounded laterally on fifth, sixth and seventh 

 segments by a curved more or less faint line of brown; venter 

 light fulvous, silvery pubescent. Legs black, silvery pubescent. 

 Wings hyaline, iridescent by reflected lights; halteres white. 

 Length of body 2mm; of the wings 2mm. 



Described from many fresh specimens. This species is smaller 

 than either S. p e c u a r u m , or S. m e r i d i o n a 1 e. S. 

 m e t a 1 1 i c u m Bell, from Mexico is given as 2mm long, but the 

 male is described. The female would be much larger. 



I have examined specimens from New Mexico, kindly sent me 

 by Professor Aldrich of Idaho, to whom the specimens were 

 sent by Mr Townsend, and named Occident ale. The 

 only difference I have been able to discover between this and 

 m e r i d i n a 1 e is its smaller average size. The tarsal 

 claws are as in meridionale. The abdominal markings 

 were too indistinct, owing to shrinkage, to allow of comparison. 

 For the present I regard it as a small variety of meridio- 

 nale. 



S. ochraceum Walker 

 But Soc. Lond. Trans. 5:332 



Female. Testaceous, with white tomentum; head white; 

 antennae testaceous; thorax ochraceous, with two white stripes; 

 abdomen blackish, testaceous at the base; femora and tibiae 

 with black tips; tarsi black, testaceous toward the base; wings 

 vitreous; veins pale testaceous. Length of body 2mm ; of wings 

 Aluxm. Mexico. 



This species can hardly be the female of S. m e t a 1 1 i c u m 

 r.ellardi. 



