370 XBW YORK STATE MUSEUM 



widened below into a crossbar, a prong invading the orbital 

 area on each side; silvery 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 entirel}^ 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 occidentale. The 

 only difference I have been able to discover between this and 

 meridionale 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 m e r i d i o - 

 u a 1 e . 



S. ochraceum Walker 

 Ent 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 

 4^ mm. Mexico. • 



This species can hardly be the female of S. metallicum 

 P»ellardi. 



