SOME NEW DIPTERA—COQVILLETT. 613 



the third joint only slightly longer than the second, arista bare; five 

 pairs of dorsocentral bristles, two huniorul. pr()])loiu'al and storn()])l(Miral 

 bristles, three on hind margin of the incsojjlciira. })t(M()pl(nira l)are, 

 scutellum bearing a very long median pair of niacroclueta: ail femora 

 ])ristly. front tibisx? each bearing a l)ristle on th<^ front and hind sides, 

 middle tibi;e with one on the front and two on the hind sidc.liind ones 

 each with two pairs on the outer side; wings liyaliiic uiniiarlxcd; 

 length, 5 mm. A male specimen, collected by jVlrs. A. V. Slosson. 



Ilahitat. — Franconia, New Hampshire. 



Ti/jje:~-Ciit. No. 5497, U.S.N.M. 



PYCNOGLOSSA, new genus. 



Form rather short and ro))ust. head in profile somewhat trapezoidal, 

 under side of the head strongly drawn upward at the anterior end, 

 bearing about four strong bristles, vibrissas well developed, face 

 .slightly concave, antennae almost as long- as the face, deflexed, the third 

 joint somewhat oval, rounded at the apex, slightly longer than wide, 

 about twice as long as the second, arista sub-basal, plumose nearh' to 

 the tip, the penultimate joint scarcely longer than broad; frontal 

 bristles descending nearly to base of antennae; eyes oval, cheeks less 

 than one-tifth as wide as the eve-height; proboscis excessively large 

 and thick, about as long as height of head, palpi slightly clavate, bearing 

 a few short bristly hairs at the apex; thorax ])earing five dorsocen- 

 trals, one pra?sutural, one intrahumeral, two humeral, two posthumcral, 

 four supra-alar, two intra-alar, two propleural, a row along the hind 

 margin of the mesopleura. and three sternopleural bristles; abdomen 

 elongate oval; all femora and tibite bristly, no erect bristle on inner 

 side of the front tibia?; lower calypteres scarcel}' apparent, venation 

 of wrings practically as in Scatoph(i<j(i^ costa beset with rather short 

 ])ristly spines, and with a longer pair at apex of the auxiliary vein. 



Type, the following species: 



PYCNOGLOSSA FLAVIPENNIS, new species. 



Black, the halteres yellow, face, sides of front and greater part of 

 cheeks gray pruinose, body somewhat polished; scutellum liearing 

 four long l)ristles and a few short t)ristly hairs, pteropleura l)are; 

 wings unusually short and broad, strongly tinged with yellow, the 

 veins also yellow; length, .5 mm. A female specimen, collected by 

 Prof. O. B.' Johnson. 



Hal) if at. — Washington. 



7>^A'.— Cat. No. 5498, U.S.N.M. 



PLETHOCH^^TA, ne^A^ genus. 



Differs from the above description of PycrKxjJoHxd only as follows: 

 Under side of head fringed with about ten bristles, antenna^ three- 



