170 ERNEST A. BACK. 



abdomine, segmentis 2-3 utrinque, apice, obscure fulvis; pedibus 

 fulvis, femoribus anterioribus et intermediis, intus et apice, tibiis intus, 

 tarsipuq obscure castaneis; posticis, femoribus apice, nigro annulatis, 

 geniculis, tibiis et tarsis apice, nigro castaneo; alis pallide fuscis, intus 

 et apice, late, fere, hyalinis. 



Translation. — Fuscous black, the pleurae and scapulae broadly red- 

 dish; antenna; black, fulvous at base; face and mystax whitish; 

 halteres fuscous; abdominal segments 2-3 on base and apex obscurely 

 fulvous; legs fulvous, the front and iniddle femora before and at the 

 apex and the tarsi obscurely chestnut-brown; the posterior femora at 

 apex black ringed; the knees, tibiae and tarsi at tip brownish-black; 

 wings pale fuscous, within and at the apex broadly hyaline. 



Of a brownish-black color; humeri, sides, flanks and haunches largely 

 reddish; antennae and proboscis black, the first segment of former 

 reddish; face and beard white. Halteres brown. Abdomen with 

 some grayish reflections on the sides, the posterior lateral portions of 

 segments 2-3 obscurely reddish. Legs reddish-yellow, the front and 

 middle femora before and above their tips blackish, their tibiae with 

 a blackish band along their interior side; the posterior femora with a 

 large dark ring towards the tip, their knees and tips of tibiae blackish; 

 tarsi blackish, with black bristles, the metatarsi yellow. The hind 

 tibiae bear at their tips a few white bristles. Wings brownish, prin- 

 cipally so towards the middle of the disc; base hyaline, as well as the 

 interior borders, the posterior borders and the tip. 



Habitat. — California (type) . 



There are at the American Museum two specimens collected 

 in Monterey County, Cal., July 1, 1896, by Dr. W. M. Wheeler, 

 which may be this species. The wings are uniformly hyaline; 

 the second posterior cell is rather long and the fourth is 

 pedunculate. The head, thorax and abdomen agree very 

 well with the description, but both basal segments of the 

 antennae are yellowish and the legs are without distinct color- 

 ation. The third segment of the antennee is a very short oval 

 with a longer style. 



Lei)to}»aster scliietteri n. sp. 



9. — -Length about 12 mm. — Similar to annulatus in regard to the 

 absence of empodia, but larger. All the femora are banded: the hind 

 pair gradually but distinctly swollen; the slender basal portion white 

 below, blackish above, the swollen distal portion brownish-black with 

 two distinct reddish-yellow bands; the hind tibiae four-banded as fol- 

 lows: — band 1, white; bands 2 and 4 almost black; band 3, reddish- 

 yellow. 



