118 THE CANADIAN ENTOMOLOGIST. 



one-half times as long as the penultimate. Pronotum ovoid, finely 

 rugulose, with a transverse depression at anterior third ; behind this very 

 sharply convex ; two and one-half times as long as the mesonotum and 

 one-half as wide as the head. Mesonotum more coarsely sculptured than 

 the pronotum, twice as wide as long, tegulae piceous ; scutellum large, 

 finely rugulose, with a punctate frenum anteriorly. Metanotum slightly 

 longer than the pronotum, rounded behind ; rather finely and evenly 

 longitudinally rugoso-aciculate. Abdomen ovate, black, highly polished, 

 extren^e tip rufous. Petiole shorter than the hind coxa ; second, third 

 and fouirth segments about equal, the fifth somewhat longer. Legs 

 piceous black, the swollen femora below and the knees reddish. Anterior 

 tibicie and their metatarsi fuscous, the tarsi chelate, rufous ; four posterior 

 tarsi pale yellow. Wings hyaline, marked with two fuscous spots ; the 

 first fills out the two basal cells, except their extreme bases, and the 

 second covers the stigma and stigmatal vein, fading out posteriorly. Basal 

 cells very distinct, marginal cell not complete ; stigma of moderate size. 



Described from a single female specimen collected at Parkville, 

 Long Island, by Mr, Wm. BeutenmuUer. Type in the collection of the 

 American Museum of Natural History. 



This species can be most readily recognized by its very dark 

 coloration. 



Bacchus atriceps, sp. nov. — Female. Length, 5 mm. Rufous, head 

 and posterior portion of abdomen black. Head black, shining ; rufous 

 below the base of the antennte ; front coarsely rugulosely punctate above, 

 below irregularly longitudinally striate : occiput margined ; cheeks finely 

 jnmctate and clothed with delicate white hairs ; mandibles light yellow ; 

 maxillary palpi four-jointed, fascous, joints nearly equal. Antennae 

 slender, reaching to the base of the hind cox.^e ; ten-jointed ; four basal 

 joints rufous, others black ; scape short, stout, a little longer than the 

 slender pedicel ; both together equal to the long, slender first flagellar 

 joint; second flagellar joint two-thirds as long as the first ; others slightly 

 decreasing in length to apex. Prothorax half as wide as head, a little 

 longer than wide, constricted just before the apex; rufous, white 

 ]Hibescent on the sides. Mesonotum distinctly shorter than the pronotum, 

 the two furrows deep ; surface shining, rufous medially, fuscous on the 

 sides. Scutellum semi-circular, separated from the mesonotum and 

 post-scutellum by transverse furrows. Metathorax short, rounded behind, 

 coarsely reticulate ; rufous, except the anterior edge, which is black. 



