AMERICAN HYMENOPTERA. 233 



line, nervures fuscous; tergum, on the basal half, white, with three di- 

 lated black bands, slightly interrupted in the middle, terminal half 

 somewhat fulvous, with about two marginal black spots and a larger 

 double one each side near the tip ; lateral processes at tip obvious ; pec- 

 tus white ; pleura with a dilated black line ; feet white, intermediate 

 tibiae and tarsi with a black line; posterior thighs tinged with honey- 

 yellow, their tibia) and tarsi dusky or blackish." 

 Indiana. Not seen. 



13. E. articulata. 



Tenthredo {Emphytus) artiruhda, King, Bed. Mag. viii, 1814, 284, 204. Fain. 



ix, S- 

 "Black; legs fuscous, joints or knuckles whitish, wings obscure, stigma fus- 

 cous. Length 2\ lines. Br. Wings 4i lines. 



The antennae are almost as long as to base of abdomen. Head, tho- 

 rax and abdomen wholly shining black; back plates whitish; on the 

 legs, the base of shanks, and on the forward legs, the tibia; and tarsi 

 are on the forward side pale whitish-yellow. The wings are pale brown, 

 the nerves as well as the stigma are blackish-brown." 

 '■Baltimore. One male." 



Section ?,. — (Aneugmenus), Hartig. 

 Lanceolate cell without cross line; hinder wings with two middle cells. 



Some species of Selandria, especially Sdandria flavlpes, in which 

 the first submarginal cross nervure is indistinct, are likely to be mista- 

 ken for this genus, but the first cell of Emjyhytus is never rounded on 

 either costal corner, as in Selandria. 



A?,. DOLERUS. 

 Dolerus and Doxi/fheus, Leach, Zool. Misc. 1814. 

 Dolerus, Klug, Die Blattw. 1818. 



Jurine, Fam. I, Nouv. Meth. 1807. 

 Lepel, Fam. fff, Mon. Tenth. 120. 

 Hartig, Die Blattw. 229, 

 Hyloioma, Fab., Fam. 3. 

 Tenthredo, Lin., Fab., <fee. 



Wim/a — Two marginal cells, divided by a straight nervure, and three 

 submarginal cells, the first small and rounded, the second long and 

 bent, receiving two recurrent nervures ; lanceolate cell with oblique 

 cross vein ; four submarginal bullre, viz. : one on the first transverse 

 nervure, two on the second, and one on the submarginal nerve at or 

 near the first recurrent nervure ; under wings with two middle cells. 



Antennae 9-articulate, filiform, third joint longer than fourth, or of 

 equal length. 



Head broad, eyes prominent, the surface coriaceous with large pits, 

 with no distinct sinus or depression on the vertex ; nasus wide and 



TRANS. AMER. EXT. SOC. (30) SEPTEMBER, 18C7. 



