1865.] 247 



the eyes to the occiput, yellowish or pale luteous ; antenna; dull black, 

 27-jointed, the scape beneath luteous, first joint stout, nearly four times 

 longer than the second. Thorax polished; tegulse and a spot before 

 it, pale luteous. Wings ample, stained with pale fuscous, clearer at 

 base, with a brassy and iridescent reflection ; nervures black, pale at 

 base as well as the costal nervure ; marginal dividing nervure not co- 

 inciding with the second submarginal nervure, the third branchial cell 

 with an incomplete cross nervure. Legs pale luteous; the coxae, and 

 the trochanters except tips, black ; tarsi dusky at tips ; anterior tibia; 

 without side spur, each of the four posterior tibiae with two side spurs. 

 Abdomen shining black ; the extreme lateral margins of the dorsal 

 segments and the apical margins of the ventral segments pale luteous; 

 extreme apical segment testaceous. Length 4 lines ; expanse of wings 

 8 lines. 



One specimen. 



Fam. UROCERID^E. 

 Genus UKOCERUS, Geoffroy. 



1. TJrocerus flavicornis, Fabr. 



Sirex flavicornifs, Fabr. Ent. Syst. ii, p. 126; Syst. Piez. p. 49. 

 Sirex blzonatus, Steph. Brit. Entom. Mand. vii, p. 114, pi. 36. Kirby, Fauna 

 Bor-Amer. iv, p. 256. 



Ten 9 specimens. 



2. TJrocerus caudatus. n. sp. 



Black: prothorax narrow, rugose, with a stripe on each side and a spot on 

 each side of occiput, whitish ; wings subhyaline; legs obscure luteous ; ovipo- 

 sitor longer tban abdomen. 



Female. — Black, subopaque; head subglobose, rugose, thinly clothed 

 with black pubescence, long on the cheeks beneath ; behind the ocelli 

 and the cheeks polished, with a few deep scattered punctures, a longi- 

 tudinal furrow on the disk, with a depression on each side; mandibles 

 polished, and, as well as the lower part of the cheeks, tinged with pice- 

 ous ; an ovate whitish spot on each side of the occiput, antenna; slen- 

 der, about half the length of the body, entirely black, 23-jointed, slightly 

 pubescent, the basal joint long and thickened at tips, roughly punc- 

 tured, third joint nearly as long as the first, remaining joints gradually 

 shorter to the tip, the terminal joint minute, about half as long as the 

 penultimate. Thorax rugose, thinly clothed with short black pubes- 

 cence ; prothorax large, narrow, depressed, subquadrate, coarsely ru- 

 gose, the sides above covered with small irregular tubercles, anterior 

 margin broadly emarginate above, excavated beneath, on each lateral 

 margin a broad longitudinal whitish stripe, extending from the tegular 



