254 MANDIBULATA. HYMENOPTERA. 



tip occasionally red, and sometimes yellow beneath in the male, trochanters 

 in this sex pale yellow, at times with a tawny spot ; wings somewhat 

 hyaline; cellule irregular, slightly petiolated. 

 Found at Darenth wood in July. 



Sp. 64. xanthostomus. Niger, abdominis medio rttfo, pedibus riifis, coxis nigris, 

 irochanteribus flavis basi nigra, ore et punctofacialijlavis. (Long. corp. 3 — 

 3§ lin. ; Exp. Alar. 5—6 lin.) 



Tr. xanthostomus. Gravenhorsi, ii. 257. — Steph. Nomen. 9,d edit. Gen. 715. 64. 



Black : mouth and a bifid spot on the face, the points directed towards the 

 mouth, yellow; antennae about the length of the body, curved, the 4 basal 

 joints black, the remainder rusty beneath, and the apical ones totally red ; 

 abdomen slightly pedunculated, oblong, a little thickened at the apex, the 

 basal segment channelled and black, 2nd to 4th or 5th red, the former with 

 a fuscous cloud, remainder black, yellowish beneath ; legs moderate, slender, 

 red, tibiae yellowish below, coxae black ; trochanters yellow, with the base 

 black, hinder tarsi fuscous ; wings somewhat hyaline ; cellule irregular, pe- 

 tiolated. 

 Not common : found near London, in June. 



Sp. 65. mitigosus. Niger, segmentis 2-^-Q pedibusque rufis, coxis posticis basi 

 nigris, facie Jlava. (Long. corp. 2 — 3§lin.; Exp. Alar. 4 — 6 lin.) 



Tr. mitigosus. Gravenhorsi, ii. 258. — Steph. Nomen. 2d edit. Gen. 715. 65. 



Black; mouth and face yellow, the latter with a dot or streak, and the tips of 

 the mandibles black ; antennae shorter than the body, slightly curved at the 

 apex, rusty-brown, paler beneath, 2 basal joints black, rusty or yellow below ; 

 abdomen somewhat sessile, as broad as the thorax, the basal segment deeply 

 grooved, entirely black, or with the tip red, 2nd to 4th nearly equal, red, 5th 

 and 6th red, with the margin yellowish or red ; legs dull red, trochanters 

 and coxse paler, or dull yellow, the hinder coxae more or less black at the 

 base and above; wings smoky-hyaline; cellule irregularly 3-angular, 

 somewhat petiolated. 

 Not very uncommon : found in June near London, and in Salop. 



Sp. 66. notatus. Niger, segmentis 2-3 rufis, nigro-noiatis, pedibus rufis, coxis 

 et irochanteribus nigris, ore Jlavo aut Jerrugineo. (Long. corp. 24 — 3lin. ; 

 Exp. Alar. 4— 5| lin.) 



Tr. notatus. Gravenhorsi, ii. 261. — Steph. Nomen. 2i edit. Gen. 715. 66. 



Black : mouth and clypeus on the margin, or entirely, yellow or reddish, the 

 base and apex of the mandibles black ; antennae a little shorter than the 

 body, recurved, 2 basal joints black, sometimes rusty beneath, remainder 

 black or fuscous, more or less rusty beneath, especially towards the apex ; 

 abdomen somewhat petiolated, oblong-ovate, basal segment black, the 

 margin generally red, 2nd and 3rd red, with 2 black dots, sometimes united 

 into a fascia, or obscure, or totally wanting, and the margins and sides of 

 the 3rd frequently black ; 4th occasionally red, rarely black, generally with 



