158 DIPTERA OF NORTH AMERICA. [PART IV. 



b. Seventh longitudinal vein straight, diverging from the sixth ; 

 discal cell closed. 

 * The fork of the posterior branch of the fourth longi- 

 tudinal vein consists of two gently arcuated 

 branches: subgenus Acyphona (compare p. 152). 



?. E. venusta 0. S. % and 9.— Alis fiavescentibus, fasciis duabus 

 fuscis ; femora ante apicem annulo fusco. 



Wings yellowish, with two brown bands ; femora before the apex with a 

 brown band. Long. corp. 0.23. — 0.25. 



Syn. Erioptera venusta 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 227. 



Body brown ; antennae paler on their basal half ; thorax reddish 

 above, with a faint indication of a double stripe in the middle ; 

 genitals reddish-yellow ; halteres and feet pale yellow ; femora 

 with a brown band before the tip ; on the front femora there is 

 an indication of a second band about the middle ; wings (Tab. I, 

 fig. If) pale yellowish, with two brown bands; the first begins at 

 the origin of the praefurca, is broadest in the middle, and reaches 

 the posterior margin so as to include the tip of the seventh longi- 

 tudinal vein; the other band lies almost entirely beyond the 

 central cross-vein ; it runs through from the anterior to the pos- 

 terior margin ; it is almost of equal breadth ; it includes a pale 

 spot at each end ; in some specimens, the spot at the anterior 

 margin is connected with the yellow of the apical portion of the 

 wing ; in this case a brown spot at the tip of the first longitudinal 

 vein is isolated from the band ; the cross-vein, closing the discal 

 cell, is clouded ; the tip of the anterior branch of the second vein 

 and the tips of both branches of the fork which includes the third 

 posterior cell, and the subcostal cross-vein are likewise clouded. 



Hab. Middle States ; common (I have seen specimens from 

 New York, Yirginia, Georgia, Illinois, Connecticut, etc.). 



8. E. armillaris, n. sp. % and 9- — Alis flavescentibus, fascia 

 media angusta et nebulis parvis in venarum initio et apice sitis, fuscis ; 

 femora pallida, fusco-annulata, vel fusca, pallido-annulata. 



Wings yellowish, with a narrow brown band in the middle, and small 

 brownish clouds at the origins and at the tips of the veins ; femora pale, 

 with brown bands or brown with pale bands. Long. corp. 0.23 — 0.25. 



Body brown; antennae paler on their basal half; thorax reddish 

 above, with a faint indication of a double stripe in the middle ; 



