250 MANDIBULATA. — HYMENOPTERA. 



Sp. 51. flavipes. Niger, fronfe muticd, abdominis medio femoribusqueanterioribus 

 Juhis, tibiis Jlavis, posticis apice nigro. (Long. corp. 5\ lin.; Exp. Alar. 

 9 lin.) 

 Tr. flavipes. Gravenhorsi, ii. 241. — Steph. Nomen. 2d edit. Gen. 715. 51. 

 Black : forehead unarmed ; clypeus and a spot on the mandibles ferruginous ; 

 abdomen with the 2iid and 3rd segments^ and the basal angles of the 4th, 

 tawny-red, or yellow; legs moderate, 4 anterior pale red, tibiae and tarsi 

 yellow, coxae and trochanters black, posterior black, tibiae yellowish, black 

 at the tip ; wings smoky-hyaline ; cellule irregular, somewhat petiolated. 

 Not common : I have taken it in the neighbourhood of the metro- 

 polis. 



Sp. 52. brachyacanthus. Niger, fronte cornutd, abdomine pedibusque fulvis. 

 (Long. corp. 2j lin. ; Exp. Alar. 4 lin.) 



Ich. brachyacanthus. Gmelin, p. 2705. — Tr. brachyacanthus. Steph. Nomen. 

 2d edit. Gen. 715. 52. 



Black : palpi and mandibles reddish, the tip of the latter black ; labrum rusty- 

 brown ; forehead with a short obtuse porrect tubercle ; antennae rusty, or 

 brownish beneath, the basal joint totally black; abdomen oblong-linear, or 

 somewhat ovate, fulvous, the basal segment sometimes with the base or a 

 dorsal spot black, or black with the tip fulvous; legs moderate, fulvous, 

 with the apex of the hinder femora sometimes fuscous ; wings rather 

 smoky ; cellule irregular, somewhat sessile. 

 Not common : taken in June at Darenth wood. 



Sp. 53. scotopterus. Fronte mutica, niger, alis fusco hyalinis, abdomine pedi- 

 busque fulvis basi nigra. (Long. corp. 3 lin. ; Exp. Alar. 5 lin.) 



Tr. scotopterus. Gravenhorst, ii. 2^i.— Steph. Nomen. 2d edit. Gen. 715. 53. 



Black and silky : forehead unarmed ; mouth straw-coloured : mandibles black 

 at the tip ; antennae rusty beneath, fuscous or black above ; abdomen 

 fulvous, with the basal segment black, or fuscescent, a little dilated towards 

 the apex, which is sometimes tawny ; legs fulvous, with the coxae black, 

 and the hinder tarsi dusky; [wings brownish- or dusky-hyaline; cellule 

 irregular, somewhat sessile. 

 Rare : obtained from Mr. Haworth''s collection. 



Sp. 54. cephalotes. Niger, capite crassiusculo, abdomine rufo basi nigra, pedibus 

 rufis, coxis et trochanter ibus anterioribus Jlavis, posticis nigris, facie et genis 

 Jlavis. (Long. corp. 3 — 3^ lin.; Exp. Alar. 5 — 6 lin.) 



Tr. cephalotes. Gravenhorst, ii. 246. — Steph. Nomen. 2d edit. Gen. 715. 54. 



Black : head rather thick and globose, crown rectangular ; mouth, face, and 

 cheeks yellow, tip of the mandibles black ; antennae porrect, fuscous, rusty 

 beneath ; abdomen glossy, more or less ovate, basal segment black, some- 

 times with a red marginal dot or band, remainder red, the 2nd occasionally 

 with 2 somewhat confluent fuscous spots at the base, the 3 terminal ones, 

 at times, with a yellow edge, and the sides of the 6th and 7th sometimes 



