200 THE CANADIAN ENTOMOLOGIST. 



yellow, tibiae brownish-yellow, tarsi black. Wings yellowish-gray ; a 

 brown spot extends from costa before tip of first vein to posterior branch 

 of fourth vein near its base ; apex of wing from midway between tips of 

 first and third veins to apex of sixth vein, grayish-brown ; a brown cloud 

 on the third vein near its base ; tip of auxiliary vein opposite base of the 

 third ; sub-costal cross-vein one and one-half times the length of the 

 humeral beyond the latter ; anterior branch of third vein oblique, ending 

 twice its length before the tip of the first vein ; sixth vein reaches the 

 wing margin. Length, 12 mm. Nevada. A single specimen from the 

 late Mr. Morrison. 



Platytira fasciola, Coq. Described as a Ceroplatus, but is best 

 located in the present genus, 



Mycetophila Il0pki?isii, n. sp. ^ . Black, the thorax and abdomen 

 sub-shining, not poUinose ; the halteres, femora, tibiye and base of metatarsi 

 dusky yellow. Antennae twice as long as the head and thorax united, 

 densely short, whitish pubescent. Thorax and scutellum sparse, coarse, 

 golden-yellow pilose; abdomen fine yellowish-white pilose. Front tibiae 

 destitute of stout bristles except at the tip, the middle and hind ones 

 bearing numerous black bristles. Wings gray, unmarked ; auxiliary vein 

 entire, ending in the costa slightly beyond the base of the third ; fourth 

 vein forks the length of the small cross-vein beyond the latter ; fifth vein 

 forks opposite the lower end of the oblique small cross-vein ; sixth vein 

 scarcely reaching beyond the middle of the posterior fork of the fifth ; 

 costal vein reaches the first third of distance between tips of third vein 

 and anterior branch of the fourth. Length, 4 mm. Morgantown, W. Va. 

 A single specimen from Prof A. D. Hopkins, after whom the species is 

 named. 



Dynatosoma fulvida, n. sp. $. Yellow, the antennae and apices of 

 tarsi black, tibiag tinged with brov/n; an indistinct brownish fascia extends 

 from one ocellus to the other, or the entire front and occiput are some- 

 times black. Wings yellowish-gray; a brown spot extends from costa to 

 base of posterior branch of fourth vein ; apex of wing from before tip of 

 first vein to apex of posterior branch of fifth vein, brownish, enclosing a 

 sub-hyaline spot that extends from the third vein to the middle of the 

 third posterior cell ; tip of auxiliary vein three times the length of the 

 humeral cross-vein beyond the latter, ending in the first vein ; sixth vein 

 not nearly reaching the wing margin. Middle and hind tibiae each bearing 



