AMFRICAN nVMENOT'TERA. Kil 



thorax behind the tepruUe, lateral and apical margins of the seutellum, 

 postscutelluui, a large mark on each side of pleura, four anterior coxae 

 and trochanters, the tarsi, the apical margins of the abdominal seg- 

 ments, and the apical segment entirely, all white; posterior tibiie and 

 base of tarsi blackish ; the wing.s are clear ; the base of the metathorax 

 above is blackish. Length % A'2 inch. 



80. Dakota, Cress. Trans. Am. Ent. Soc. i. p. 302, % . 



Hab. — Dakota Territory. A dull black species with clear wings 

 and a single yellow band on abdomen, (third segment), shading into 

 pale ferruginous po.steriorly ; the face, scutellums. posterior foce of 

 metathorax aud most of legs are yellow; antennae black above, pale 

 beneath. Length % .50 inch. 



81. pictifrons, Cress. Proc. Ent. Soc. Phil. iii. p. KJO, % . 

 1^(76.— Colorado. A small slender species, with the second and 



third abdominal segments entirely yellowish-ferruginous; the face is 

 whitish marked with black, and the scutellum aud most of tibiae yel- 

 lowish ; wings subhyaline. liCngth % .42 inch. 



82. bipunctatus, Cress. Proc. Ent. Soc Phil. iv. p. 253, S . 

 VAT. /estus, Cress, id. p. 257, % . ■ 



Hah. — Colorado. In the type the head is entirely black with two 

 yellow spots on clypeus ; the thorax entirely black except a yellow dot 

 on teguhi% another beneath and one on tip of scutellum; legs yellow, 

 coxae and trochanters black, and femora and tips of posterior tibiae 

 fulvous; second and third segments of abdomen yellowish-ferruginous, 

 the former pale at base and the latter with a large fuscous stain at 

 base. The \auety /e.sfux differs by the clypeus being yellow except a 

 black spot at tip, and the second and third abdominal segments being 

 dull ferruginous, stained with fuscous; wings subhyaline. Length % 

 .55 inch. 



83. Wilsoni. 



Jscltnus Wilsoni, Cress. Proc. Vjat. Soc. Phil, iii, p. 188, % . 

 Hab. — N. J., Del., Va. A small, elongate, slender, shining black 

 species; the abdomen convex and cylindrical with the se<*ond and third 

 segments entirely yellow except narrow black apical margin; the an- 

 tennae are black above, pale beneath ; face, scutellum aud most of legs 

 yellow; wiugs yellowish-hyaline. Length % .40 — .50 inch. 



84. versabilis, n. sp. 



%. — Dull black; line on anterior orbits, face, clypeu.s, mandibles, labrum, 

 palpi, scape beneath, anterior margin of tegulse, line before, another beneath, 

 Ecutellutn, sometimes a spot or line behind, dot on four anterior coxa and 



TBASS. AMER. ENT. SOC. VI. (22) JILY, 1877. 



