228 PROCEEDINGS OP THE ACADEMY OF 



indistinct nebulosities in the axillary and subaxillary area; veins yellow, 

 except where the clouds and spots occur; length lin. 2^-2|. Washington, 

 D. C. Common. E. graphica. 



14. The forked externomedial vein originates from the great cross-vein (see the 

 figure in Curtis' Brit. Ins. tab. 557). 15 



The forked externomedial vein originates beyond the great crossvein, that is, 

 from the praebrachial vein; greyish black, the body, the veins and the 

 posterior margin of the wings covered with long, black hairs, which 

 appear golden in a certain light; halteres, antennae and feet black; the 

 second radial area is square at its base, the basal cross-vein being in a 

 line with the stigmatical cross-vein ; the cubital and subcubital areas are 

 likewise square at their base, of equal length and but little shorter than 

 the second radial ; (the veins can be seen only when the pubescence is 

 rubbed off; length lin. |. Washington, D, C, and Relay House, near 

 Baltimore (nob.), 10 <-f specimens; forms clouds in the Spring in the 

 vicinity of running waters ; perhaps synonymous with the European E. 

 murina Meig ? E. ursina. 



15. Body brown; wings dusky; veins very hirsute with brown hairs; pale 

 spots at humeri ; halteres infuscated ; feet fuscous ; coxa? and base of 

 femora pale; antenna; brown; length lin. 2-2. Three 9 from Maryland 

 (nob.). E. hlrtipennis. 

 Body yellow; front and margin round the thorax sulphur yellow; the 

 latter, if viewed in a certain light has a hoary reflection ; palpi brown ; 

 antenna? pale, brown at tip ; halteres sulphur yellow ; anterior feet tawny, 

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

 and tips of tibia? ; wings and their veins pale yellowish ; veins thickly 

 hairy ; a fringe of golden hairs along the anterior margin and round the tip; 

 long 2 lin. Washington, D. C, eight 9 specimens. E. pubipennis. 



Symplecta Meig. 



The distinguishing character of this genus is the undulating axillary vein. The 

 absence of spurs at the tip of the tibia seems to indicate a relationship to E r i o p- 

 tera; at the same time it is a ground for separation from Limnophila, 

 Anisomera, etc. 



The $ forceps consists of two subcylindrical, coriaceous pieces with two 

 stout horny appendages attached to each of them (fig. 29, forceps of S.punc- 

 tipennis; the , 9 . ovipositor shows some analogy to that of Gnophomyia 

 in the shortness of the lower valves ; besides the ovipositor is armed on the tipper 

 side at the base with (too small teeth. This character, first noticed by Schummel 

 inS. punctipennis, &c, belongs also to several 9 Eriopterae. 



For details about this genus, I refer to Meigen, Walker, Zetterstedt, etc. 



Judging from the description of the European S. punctipennis Meig. it 

 would seem that the specimens which I caught in America belong to the same 

 species. I describe them, therefore, under the same name. 



S. punctipennis. Cinerea, thorace vittis tribus fuscis : alis albicantibus, 

 venulis transversis infuscatis. 



Limnobia punctipennis Meig. Eur. Zw. Ins. i. p. 147, tab. v. f. 7. 



Symplecta punctipennis 1. c. vol. vi. p. 283. 



Head cinereous ; antennae and palpi black. Thorax cinereous ; hoary on the 

 pleurae; praescutum with three distinct brown stripes; knob of the halteres 

 infuscated ; feet brown, paler at the base. Tergum blackish ; venter cinereous ; 

 9 genitals pale. Wings whitish cinereous; cross-veins, base of petiole, etc.. 

 clouded ; neuration exactly like Meig. i. tab. v. f. 7. 



Common in the spring and autumn ; occurs even frequently in winter. Wash- 

 ington, D. C. Mobile, Ala., (nob.) Illinois, (Mr. Kennicott.) 



Compared 12 tf specimens. The supplementary cross-vein in the second 

 radial area is sometimes wanting ; the same is the case with the first lower 

 discal cross-vein. 



[Aug. 



