'2<j:i 51AXDIBULATA. HYMENOPTERA. 



Tr. niger. Gravenhorst, ii. 126. — Steph. Notnen. 2d edit. Gen. 715. 1. 



Black: mouth and face straw-colour; mandibles black at the tip; antennas' 

 straw-colour, above ferruginous, red towards the apex ; thorax with a 

 whitish dot at the base of the wings ; ovipositor extremely short, slightly 

 exserted; legs rather slender, 4 anterior pale red, coxae black, with a straw- 

 coloured dot at the apex, trochanters straw-colour ; posterior legs black, 

 with the tip of the trochanters pale straw, tihiee straw colour, with the 

 extreme base and the apex black ; tarsi testaceous-brown ; wings slightly 

 smoky-hyaline; cellule irregularly 3-angular, somewhat sessile. 

 Rare : found in the beginning of June at Darenth wood. 



Sp. 2. pr^rogator. Niger, ore pedibiisque fulvis, coxis posticis antenninque maris 

 fuscis ; {(stvcSxiie. fulvis. (Long. corp. 3 — 51 lin. ; Exp. Alar. 4 — %\. lin.) 



Ich. praerogator. Linne. — Try. prsrogator. Steph. Catal. 351. No. 4472. 



Black : palpi and mandibles fulvous, the apex of the last black, labrum and 

 margin of the clypeus fulvous ; antennae a little curved at the apex ; of the 

 male entirely black-brown, of the female rusty-fulvous, more or less fus- 

 cescent towards the base ; abdomen of the male narrow and somewhat 

 linear ; of the female as wide as the thorax and oblong, thickened at the 

 apex, 2nd and 3rd segments with their edges sometimes a little fuscescent ; 

 legs moderate, fulvous, the hinder pair with the extreme tips of the femora 

 and of the tibise, and also the basal joint of the tarsi dusky ; the posterior 

 coxffi, and rarely also the middle pair of the male black ; wings somewhat 

 hyaline, of a glaucous hue ; cellule large, transverse, regularly 3-angular, 

 more or less petiolated. 



The posterior femora are sometimes duskj'. 



Extremely abundant in some parts of the country in June and 



July : common at Darenth and Coombe woods, near Hertford, &c. 



Sl3. 3. flavilabris. Sericans, niger, pedibus fulvis, ore lalroquefiavo. (Long. 



Corp. 4— 5| lin.; Exp. Alar. 7 — 9 lin.) 

 Tr. flavilabris. Steph. Nomen. 2d edit. Gen. 715. 3. 

 Black, silky and very glossy: palpi pale; mouth and labrum yellow, tip of 



the mandibles black ; antennae black, a little fuscescent at the apex in both 



sexes, and incurved ; abdomen elongate, subclavate, and somewhat sessile; 



legs in both sexes entirely pale fulvous ; wiogs glossy, hyaline ; cellule 



3-angular, sessile and regular. 



Apparently not uncommon, at least within the metropohtan dis- 

 trict, and in Salop, at the end of summer. 



Sp. 4>. compunctor. Niger, sericeus, pcdibus riifis, coxis et tihiarum posticarum 

 apice nigris, ore et antennis ferru^ineis. (Long. corp. 3 — 5 lin.; Exp. Alar. 

 5— 7| lin.) 



Ich. compunctor. IJnne.—Steph. Catal. 345. No. 4315. 



Black : mouth ferruginous, the base and apex of the mandibles black ; 



