162 DIPTERA OP NORTH AMERICA. [PART IV. 



Hab. United States, common ; occurs also in Cuba. 

 The discal cell of this species is sometimes closed, but generally 

 open. 



12. E. parva 0. S. % and 9 . — Alis sublimpidis, nebulis in margine 

 parvis noveni vel decern obscuris. 



Wings subhyaline, nine or ten small dark clouds along the margin. Long, 

 corp. 0.15—0.2. 



Stn. Erioptera parva 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 227. 



Brownish-yellow, thorax paler above, with two distinct dark 

 brown stripes ; similar stripes on the pleurae ; feet whitish, with 

 an obscure band before the tip of the femora. Wings with a 

 grayish tinge ; small gray clouds along the anterior and posterior 

 margins, at the tips of all the longitudinal veins ; those of the 

 anterior margin somewhat larger ; central cross-veins clouded. 

 Discal cell open, coalescing with the third posterior cell. 



Hab. Washington, D. C. ; Orange, N. J., in June, not rare ; 

 Dalton, Ga. The coloring of its body is very like that of E. 

 c alopter a. 



B. The prasfurca ends in the first subinarginal cell, which is longer than 

 the second ; the inner end of the discal cell (or rather, as it is 

 always open, of the second posterior cell), as well as the great 

 cross-vein, are not in one line with the small cross-vein, but 

 much nearer to the basis of the wing (Tab. I, fig. 19) : subgenus 

 Molophilus (compare p. 153). 



13, E. pufoipennis 0. S. 9 . — Flava, fronte et humeris sulphureo- 

 flavis ; pedibus anticis fuscis ; alis immaculatis, costa et apice flavo- 

 villosis. 



Yellow, front and humeri sulphur-yellow ; front feet brownish ; wings im- 

 maculate, costa and apex with a golden-yellow fringe of hairs. Long. 

 corp. 0.2. 



Stn. Erioptera pubipennis 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 228. 



Body of a saturate yellow ; front and margin round the thorax 

 sulphur yellow ; this margin, if viewed in a certain light, has a 

 hoary reflection ; mesonotum reddish-yellow ; palpi brown ; an- 

 tennae pale, brownish at the tip ; halteres pale yellow ; fore feet 

 brown, clothed with brown hairs ; the two other pairs yellow, 

 with the tips of the tibiae and the tarsi brown ; wings grayish, 

 thickly hairy ; costa yellow, with a fringe of golden-yellow hairs, 



