328 Professor Aldrich on the 



6. Ohrysotus liirsutuSj n. sp. 



$ . Palpi prominent, pale yellow ; eyes contiguous on the face, 

 leaving a whitish-dusted triangle below the antennae ; front shining 

 green ; antennse small, black, with apical arista ; cilia of lateral 

 and inferior orbits white. Dorsum of thorax bright green ; 

 pleurae blackish, with dense whitish dust ; cilia of tegulse brownish- 

 yellow ; tegulae and halteres yellow. Abdomen shining green at 

 the base, more blackish posteriorly, with black hairs ; hypopygium 

 concealed, only a small appendage or two, with rather long yellow 

 hairs visible. Fore coxae yellow, dark at base, with a group of 

 brown bristles near the tip ; middle and hind coxae blackish, with 

 yellow tip. Fore femora, tibiae, and four joints of tarsi yellow, 

 the last tarsal joint blackened, with enlarged pulvilli ; the fore 

 femora are a little thickened, and on the underside have a row of 

 brownish hairs ; the tibiae on the underside have a row of long, 

 closely-appressed hairs. The middle femora have a row of hairs, 

 like the front ones ; their tarsi are blackened from the tip of the 

 first joint, and the pulvilli are small. The hind femora are 

 thickened, the apical third infuscated. The row of hairs below 

 ends near the tip, with four cr five coarse bristles ; knees yellow ; 

 hind tibiae yellow with a brown stripe down the whole length of 

 the outer side, upon which is situated a dense row of bushy brown 

 hairs ; these hairs continue down the tarsus, becoming smaller 

 beyond the first joint ; the tarsi are very short and tapering, the 

 first joint about two-thirds as long as all the rest ; they are gradu- 

 ally infuscated beyond the first joint. "Wings hyaline; fourth 

 vein a little bent just beyond the posterior cross- vein, ending in 

 the apex ; the curve before the apex is but little fuller than that 

 behind it. 



5 . Face rather broad, white poUinose ; fore coxae with rather 

 numerous yellowish hairs; femora not perceptibly thickened, these 

 and the tibiae without rows of hairs ; hind femora with two or 

 three pre-apical bristles, only its tip infuscated. The hind tibiae 

 have several stout bristles, and the metatarsus is scarcely half as 

 long as the following joints, all of which are plain. 



Length 1*6 mm. ; of wing, 1*4 mm. 



Numerous males and females. Marcli, May. Sea- 

 levelto 1000 feet. 



This species will probably form a new genus. I place 

 it here provisionally, on account of the male eyes. 



