J. R. MALLOCH 285 



one to two interspersed long hairs; antennae shorter than face, third joint not 

 over twice as long as second, slightly angulate at apex on upper side; arista 

 slender, with distinct pubescence; parafacial distinct in profile, slightly nar- 

 rower than third antennal joint, and half as wide as height of cheek, the 

 latter with five to six long marginal hairs, a very long vibrissa and one bristly 

 hair a]jo\-e the latter. Presutural acrostichals two-rowed, sparse; bristles of 

 thorax much longer than those of abdomen. Fifth abdominal sternite with a 

 shallow, rounded posterior excision; hypopygium small. Legs slender; fore 

 tibia with one posterior bristle; mid femur with three to four anterior and pos- 

 tero-ventral bristles on basal half; mid tibia with the usual two bristles at 

 nearly the same height; hind femur with four very long, widely spaced bristles 

 on antero-ventral surface, between which there are much shorter setulose 

 hairs; hind tibia with one comparatively short antero-ventral bristle, the an- 

 tero-dorsal bristle and the preapical dorsal one-half as long as tibia and very 

 slender. Inner cross-vein at four-sevenths from base of discal cell; last sec- 

 tion of fourth vein twice as long as preceding section ; apices of third and fourth 

 veins almost in vertical line. Length, 2.75 mm. 



Type. — cf ; Beulah, New Mexico, top of range, June 28, 1902, 

 [A. N. S. No. 6203]. 



This species resembles flavicoxa Stein in general appearance, 

 but that species differs in coloration of legs, bristling of liind 

 femora and tibiae, and in venation. 



Coenosia argentata Cocjuillett? 



1904. Coenosia argentnta Cociuillett, Invert. Pac, i, 33. 



A female in very poor condition agrees fairly well with males 

 of this species before me, but has the legs paler, and the bristles 

 shorter. I refer the specimen here with some doubt.^ 



Locality; San Francisco, California, August 7, (F. E. Blais- 

 dell), 1908. 



Coenosia lata ^\'alker 



1853. Coenosia lata \\'alker. Dipt. Saund., 368. 



One female, Cloudcroft, New Mexico, June 16, 1902; one 

 female, San Francisco, California, August 7, (F. E. Blaisdell), 

 1908. 

 Coenosia sp?. 



One female in very poor condition; ma}' possibly be an imma- 

 ture example oi fraterna sp. n. 



Locality; Mesa Grande, Sonoma County, California, (J. P. 

 Baumberger), June, 1908. 



'Since writing the above I have received two male specimens of arqcniala, 

 taken at San Francisco, California, March 30, 1909, which are now in the 

 Academy collection. These agree very closely with the female referred to 

 above. 



TRAXS. AM. EXT. SOC, XLIV. 



