

NO. 1938. THE DIPTEROUS FAMILY PHORIDJE—MALLOCH. 431 



DOHRNIPHORA ABBREVIATA von Roser. 



A very scarce species, easily recognized by the abbreviated wing 

 veins. The hind tibiae have three serial spines, the lower one being 

 just below the middle. Not recorded from America. 



DOHRNIPHORA CRASSICORNIS Melgen. 



Very similar to concinna Aleigen, but easily known by the charac- 

 ters mentioned in table * from that species. Recorded from America. 



DOHRNIPHORA CONCINNA Melgen. 



With venusta Coquillett the smallest species of the genus and 

 generally distributed over North America and Europe. Black, more 

 or less shining; halteres pale, or dark, irrespective of sex, very variable 

 in this respect ; hind tibise with only 4-5 antero-ventral setulae. This 

 is the species Aldrich described as P. cimhicis, and which stands also 

 in the American list as nitidifrons Brues. I have examined the tj'pes 

 of both those species and can not find any difference from European 

 examples of concinna. 



Localities. — Brookings, South Dakota; San ^Mateo County, Cali- 

 fornia (Baker); New Bedford, Massachusetts (Hough); Ithaca, New 

 York; Beverly, Massachusetts. 



DOHRNIPHORA KNABI, new species. 



Black, shining; frons glossy black, with numerous weak hairs in 

 addition to the usual bristles, post-antennal bristles strong, first row 

 of bristles sUghtly convex, second row distinctly concave, the outer 

 pair being placed much lower on frons than the center pair, no dis- 

 tinct ocellar tubercule, vertex slightly raised, antennae large, nearly 

 round, brownish in color, arista nearly bare, palpi brown, large, pro- 

 trudmg, moderately bristled; thorax shining black, covered with 

 short hairs, four scutellar bristles, anterior pair rather w^eak; abdo- 

 men dull black, second, and sixth segments elongated, abdomen 

 nearly devoid of hairs, hypopygium large, ventral processes knob- 

 like, brownish, anal protuberance dusky yellow, long and broad, 

 with numerous short hairs; legs brown, the anterior pair yellowish, 

 fore tibiae with serial row of 5 setulae on postero-dorsal surface, the 

 usual two spines on mid tibiae at very near the base, apical one very 

 weak, hind tibiae without distinct setulae, except one at tip on dorsal 

 surface and the usual end spurs; wings grajdsh, costa to very slightly 

 beyond middle, thickest on basal two thirds, first division about five 

 times as long as other two together, third about one-third as long as 

 second, fringe barely longer than diameter of costal vein, angle of 

 fork of third vein very acute, fourth vein regularly arched; halteres 

 black. 



I Braes, Gen. Ins., 1906. 



