1902.] NATURAL SCIENCES OF PHILADELPHIA. 59 



pens and mandibles and the spot on dorsnlum are apparently con- 

 stant in this species and are good superficial characteristics. The 

 other spots, however, vary to some extent, and in one specimen 

 there are traces of yellow on scutellum. 

 Odynerus longicornis n. sp. 



cf. — Black; clypeus (except a median spot and the sides and 

 apical margin narrowly), dot at insertion of antennse, in the eye- 

 emargiuation, near summit of cheeks, line on mandibles basally and 

 on scape beneath, hind margin of pronotum, postscutellum except 

 apex, elongate spot on median femora beneath at apex, dot (^n 

 tegulpe at base, and a small one behind them, and a line at apex of 

 abdominal segments 1-6, yellow ; the lines on first two segments 

 broadest; joints 2-10 of antennse fulvous beneath; tegulse, tibise 

 and tarsi brownish. Head with deep punctures, well separated 

 especially on the front, the latter rather flat, scarcely impressed ; 

 hind ocelli margined internally by a tubercle, scarcely pitted; 

 clypeus pyriform, with shallow, sparse punctures, with a sharp 

 carina on each side terminating in a sharp tooth apically (the apex 

 has a deep triangular emargination ) ; antennae long and slender, 

 longer than head and thorax ; terminal joint curved, In length about 

 equaling the preceding two united, the penultimate one small ; 

 pronotum not crested, but with a distinct bkmt tooth laterally, its 

 punctures as well as those of dorsulum deep and separated, and its 

 median length not well developed ; scutellum with fewer and shal- 

 lower punctures, not impressed, the mesopleurse even more so; 

 middle segment not well developed above medially, rather emar- 

 ginate, rugoso-punctate above, the punctures becoming shallower 

 and sparser on sides near metapleurse ; concavity irregularly mar- 

 gined by a ridge, rugoso-punctate, but not so coarsely as the upper 

 surface ; carina of first segment bordered posteriorly by a series of 

 foveae, and then, on each side of the segment, by a smooth area ; 

 remainder of dorsal surface with deep separated punctures, its 

 median length from the carina to apex about half as long as broad 

 apically ; second dorsal segment with the punctures separated, but 

 much shallower except at sides, smooth at base however, where it 

 is depressed, so that when viewed from the side the segment seems 

 obtusely angulated between base and middle, apical margin not 

 reflexed ; punctures of remaining segments, except on second ven- 

 tral, confined to apical portion ; wings subhyaliue, darker along 



