298 MANDIBULATA. — HYMENOPTERA. 



§ III. Scutellum black; abdomen either wholly red, or red and black. 



Sp. 5. exiguus. Niger, antennarum hasi pedibus abdomineque testaceis, seg- 

 mento 1-mo nigro. (Long. corp. 2 Hn.; Exp. Alar. 3| lin.) 



Phy. exiguus. Gravenhorst, ii. 666. — Steph. Nomen. 2d edit. Gen. 722. 5. 



Black : palpi whitish ; mandibles with a red dot ; antennae rusty towards the 

 base, the 1st joint testaceous beneath ; metathorax with 2 rather acute 

 tubercles ; abdomen ovate, depressed, as wide as the thorax, testaceous 

 straw-colour, the basal joint black and somewhat linear, 2nd to 4th with 

 the sides fuscous ; ovipositor about the 5th part of the abdomen in length ; 

 legs moderate, straw-coloured, posterior tarsi and the extreme apex of the 

 tibiae fuscescent ; wings smoky-hyaline, iridescent ; cellule 5-angular. 

 Taken, not rarely, in June, near Hertford, and in other places 



within the metropolitan district. 



Sp. 6. ovatus. Niger, metathorace subbispino, segmentis 2 et 3, antennarum 

 hasi pedibusque rufis, horum posticis apice Jemorum et tibiarum nigris. (Long, 

 corp. 2i — 3 lin. ; Exp. Alar. 3§ — 5 lin.) 



Phy. ovatus. Gravenhorst, ii. 668. — Steph. Nomen. 2d edit. Gen. 722. 6. 



Black: mouth red; antennae with the 1st to 7th or 8th joints, or some of 

 them, red ; metathorax with 2 rather acute spines ; abdomen as wide as the 

 thorax, ovate, the basal segment channelled and black, 2nd and 3rd red, 

 remainder black, 6th and 7th with the margins slightly white ; ovipositor 

 about one-third the length of the abdomen; legs red, posterior with the tips 

 of the femora and of the tibiae black, tarsi fuscous ; wings smoky-hyaline ; 

 cellule 5-angular. 

 Found near London in June, not common. 



Sp. 7. quadrispinus. Niger, metathorace 4-2 spina, segmentis 2 et 3 rufis, 

 Jemoribus tibiisque rufis, posticis suinmo apice nigris : mas facie et coxis 

 anterioribus albomaculatis ; foemina antennarum annulo albo. (Long, corp 

 3 — 4 lin. ; Exp. Alar, 5 — 8 lin.) 



Phy. quadrispinus. Gravenhorst, ii. 674. — Steph. Nomen. 2d edit. Gen. 722. — 

 Cry. quadridentatus. Steph. Catal. 345. No. 4115. 



Black : male with the mouth, clypeus, a spot on the face, and the inner orbits 

 ochreous or white ; antennae porrect, half the length of the body, the basal 

 joint beneath white or ochreous ; of the female involuted, scarcely half the 

 length of the body, about the 7th to 11th joints whitish above, with a fuscous 

 dot beneath ; metathorax very rugose, with 4 acute tubercles, the 2 upper 

 ones most robust and acute, the other shorter and at times rather obsolete; 

 abdomen ovate, of the female as wide as the thorax, of the male narrower, 

 the basal segment aciculated, with 2 elevated lines, entirely red, or in some 

 males with the petiole black, the latter short and broad, 2nd red, smooth in 

 the females, aciculated at the base in the males, 3rd also red, often with the 

 margin black, remainder black, the edges of the 6th and 7th glaucous- 

 white; ovipositor scarcely a fourth of the abdomen in length; legs 



