342 CHARLES T. BRUES. 



but differs by the normal form of the palpi, which do not lack the 

 lateral bristles. It also differs in having a shorter front and shorter 

 first longitudinal vein. From P. paehyneura Lw. it is distinguished 

 by its less thickened third vein, longer costal bristles, bristles on bind 

 tibise, and presence of only two scutellar bristles. 







Phora tlioracica Meig. (Fig. 4.) 



Meigen, Classification, i, 313. 



Zetterstedt, Ins. Lapp., 795, 2. 



Zetterstedt, Dipt. Scand., vii, 2852. 



Schiner, Fauna Austriaca, ii, 342. 



Becker, Monog. Phorida?, 20. 

 Thorax and pleura? reddish yellow, ferruginous or darker. Abdomen black. 

 Halteres yellowish white. Dorsum with only one pair of dorsopentral macro- 

 chfetse and four distinct scutellar bristles. Head black, palpi yellow. Antenna? 

 reddish yellow or ferruginous, rather small, arista almost bare; cheeks with two 

 stout, downwardly directed macrocha?ta?. Second and sixth segments of abdo- 

 men elongated. Legs yellow, hind femora broadened; fore tibiae with a single 

 external bristle near the middle ; middle ones with a pair at the base and a third 

 one near the apex ; hind tibia? with two at the basal third, another at the apical 

 third, and a fourth just before the apex ; spurs of four posterior tibia? well devel- 

 oped. Wings large, usually infuscated on the apical third ; costal vein reaching 

 beyond the middle of the wing, conspicuously thickened near the middle portion, 

 and ciliate with very fine, short bristles. Third longitudinal vein distinctly 

 bristly as far as the origin of the second ; first vein equidistant from the humeral 

 cross-vein and the apex of the costa; fourth vein arising somewhat before the 

 fork of the third, strongly bent at the base, straight elsewhere; seventh 

 vein distinct. 



Length 3.5-5 mm., wing 4-5.5 mm. 



There is a single specimen of this species, from New Hampshire, 

 in the Osten Sacken Collection at the Museum of Comparative 

 Zoology in Cambridge. I have seen no European specimens, but 

 this one agrees perfectly with Becker's description, of which I have 

 given a translation above. A second specimen is before me. from 

 Franconia, N. H. (Mrs. Slosson). 



Phora microcephala Lw. 



Loew, Centuries, vii, 96. 



Aldrich, Canadian Entomologist, xxiv. 



Coquillet, ibid., xxvii. 

 Almost wholly black, antenna? and palpi sometimes brownish ; trochanters, 

 knees, tarsi, and fore tibia? yellowish. Front and thoracic dorsum shining; 

 halteres yellow. Above the. base of the fore coxa? are two bristles pointing 

 downward ; lower frontal bristles broadly divaricate. No lines or sutures about 

 the ocelli. Wings almost hyaline; third vein extending to the middle or slightly 

 beyond, distinctly forked ; first longitudinal extending half-way to the tip of the 



