1865.] 168 



trerne side, that on the second segment continued beneath where it is 

 indented on each side anteriorly ; apical segments closely punctured ; 

 beneath shining. Length 5J lines; expanse of wings 9 lines. 

 Collection. — Dr. J. Grundlach. One specimen. 



Odynerus obliquus, n. sp. 



Black ; clypeus, line between the antennae, line behind eyes, base of antennae, 

 anterior margin of prothorax, spot on each side of metathorax, most of legs, 

 apical margins of two basal segments of abdomen and an oblique spot on each 

 side of the second at base, yellowish; wings subhyaline, marginal cell dusky. 



Female. — Black, deeply and closely punctured, slightly pubescent, 

 somewhat shining; posterior orbits of the eyes, the sinus in front, a 

 longitudinal line between the antennas, and the clypeus except its api- 

 cal third, yellowish, more or less varied with dull ferruginous ; man- 

 dibles piceous, with an exterior yellow line ; antennae black, the flagel- 

 lum piceous at base, the long basal joint bright yellow. Thorax : broad 

 anterior margin of prothorax, a rounded spot just beneath the anterior 

 wiug, connected with a much smaller spot beneath, tegulae, except a 

 minute black dot on the disk, a dot just behind the tegulae, scutellum, 

 faintly divided down the middle, the postscutellum, and a rather large 

 elongate spot on each side of the metathorax behind, yellow ; pleura 

 sericeous. Wings subhyaline, faintly tinged with fuscous ; the costal 

 margin stained with honey-yellow j the marginal cell, and the apical 

 margins faintly, fuliginous. Legs yellow; the coxae, trochanters and 

 the posterior femora, black ; tarsi fusco-ferruginous. Abdomen with 

 the basal segment somewhat dome-shaped, deeply and closely punc- 

 tured, with a transverse suture on the anterior margin, apical margins 

 yellowish, slightly tinged with ferruginous, broader in the middle than 

 on the side^s ; second segment large, convex, shining, delicately punc- 

 tured, a rather broad apical band and an oblique spot on each side at 

 base, dull ferruginous margined with yellowish, the apical band on this 

 segment is continued beneath, but not so broad as above ; remaining 

 segments gradually acuminate, entirely black. Length 4| lines; ex- 

 panse of wings 8 lines. 



Male. — Resembles the female, except that the clypeus is entirely 

 yellowish, the antennae are terminated by a hook, and all the markings, 

 though situated as in the female, are bright yellow and not varied with 

 ferruginous. Length 4 — 4} lines; expanse of wings 6J — 7* lines. 



Collection. — Ent. Soc. Philad. One 9 , two % specimens. 



Smaller than 0. cmgulatus, and at once distinguished by the basal 

 oblique spot on each side of the second abdominal segment. 



