604 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



than thorax, ovate, glossy black, anterior margin of each segment 

 with a gray pollinose, laterally dilated spot, and generally with a 

 narrow dorso-central line of the same nature, which gives the seg- 

 ments the appearance of having a large siibtriangular black spot on 

 each side; all segments with scattered, surface, hairlike bristles, 

 those on the lateral and posterior margins longest, no strong discal 

 bristles on last segment; hypopygium glossy black, of moderate size, 

 but not protruding much. Legs rather elongate, mid tarsus longer 

 than mid tibia by almost the length of the last two joints; fore tibia 

 without bristles except at apex; mid femur without any distinct 

 ventral bristles; mid tibia bare; hind femur with a comblike fascicu- 

 lus of short, stiff, black bristles, which begins at near base on the 

 ventral surface and runs for a short distance on to the postero- 

 ventral surface; antero-ventral surface with 2 to 3 long bristles on 

 apical third; hind tibia bare, except for one short, preapical bristle 

 at near to apex on dorsal surface, and in one specimen a weak antero- 

 ventral bristle at about apical third. Wings clear; costal thorn 

 indistinguishable; third and fourth veins convergent, as in Muscina 

 stahulans; last section of fourth vein twice as long as penultimate 

 section; outer cross vein slightly waved. Calyptrse with the under 

 scale much the largest. 



Length, 3 mm. 



Female. — Similar to the male in color, etc., but differs considerably 

 in the bristling of the legs; the fore tibia has one short postero- ventral 

 bristle on near middle; the mid femur has one strong bristle on the 

 middle of the anterior surface; the mid tibia has on the posterior sur- 

 face one moderately strong bristle above the middle and another, 

 weaker, one below middle; the hind femur has the comb absent, and 

 one strong preapical antero-ventral bristle; the hind tibia has two 

 close placed weak antero-ventral bristles below middle, one on antero- 

 dorsal surface at middle, and one weak preapical dorsal bristle. 

 Wings as in male, but the last section of fourth vein is not twice as 

 long as penultimate section. 



Length, 4 mm. 



Type, Allotypes, and Paratype.— Cat. No. 15670, U.S.N.M. 



Type-locality. — Los Angeles County, CaUfornia, March (collection 

 Coquillett). Two males and two females. 



PARALIMNOPHORA, new genus. 



Generic cJiaracters. — Eyes bare or with very short, sparse pilosity; 

 frons broad, at vertex about one-third the head width, in male dis- 

 tinctly narrower at vertex than above antennae; orbits distinct, orbital 

 bristles situated on near to inner margin of orbits, lower pair very 

 strong, the three pairs above them decreasing in size, all four pairs 

 incurved; upper two pairs backwardly directed; ocellar bristles very 



