24»2 MANDIBULATA. HYMEN'OrTKUA. 



ones on the metathorax dull pitchy-red ; abdomen slender^ elongate-clarate, 

 the edges of the segments more or less broadly whitish; legs pale red, 

 posterior darkest, and with the tips of their tibise and their tarsi black ; 

 wings hyaline ; cellule wanting. 

 Rare : taken in June at Darenth wood. 



Sp. 31. formosus, Niger, prothoracis dorso rujb, ore, picturis thoracis ei mar~ 

 ginibus segmentonim albidis, pedibus fulvis, posticis tarsis et tibiarum apiee 

 nigris : mas facie albidd, pedibus anterioribus stramineis ; foemina punctis 

 Q-bus faciei albidis. (Long. corp. 3^ — 4 lin. ; Exp. Alar. 54 — 7 lin.) 



Tr. formosus. Gravenhorst, ii. 185. — Steph. Nomen. 2d edit. Gen. 715. 31. 



Black : mouth and clypeus whitish ; face of the male entirely whitish, of the 

 female black, with a small white dot on the inner orbits ; antennae of the 

 male fuscous, beneath rusty, with the 2 basal joints whitish ; of the female 

 ferruginous, with the first 2 joints black ; thorax of the male black, pro- 

 thorax red on the back, with thebreast, margins of the collar, a hooked streak 

 before the wings, a dot beneath them and below the scutellum whitish ; of 

 the female with the anterior prothorax red, the collar black, with yellow 

 lines and dots in the same places as the whitish ones of the male; meta- 

 thorax whitish ; abdomen with the margins of the segments greenish-white, 

 the base of the 3rd fulvescent, all whitish beneath ; legs fulvous, the posterior 

 tarsi and apex of the tibiae black ; 4 anterior coxae and trochanters in the 

 male flavescent ; wings hyaline ; cellule wanting. 

 Found, but rarely, near London in June. 



Sp. 32. sanguinicoUis. Niger, prothorace, seutello et pedibus rujis, horum 

 posticis apice nigro, segmentorum marginibus summis albis : mas facie, coxis 

 et trochanteribus anterioribus, picturisque thoracis Jlavis. (Long. corp. 2|— 

 3§ lin. ; Exp. Alar. ^—G lin.) 



Tr. sanguinicoUis. Gravenhorst, ii. 187. — Steph. Nomen.2d edit. Gen. 715. 32. 



Black : face and mouth whitish-yellow, the mouth only in the female ; antennae 

 red, the 2 basal joints black, yellow beneath in the male ; thorax red, with 

 the neck, metathorax and a broad longitudinal dorsal line on the prothorax 

 black, a hooked line before the wings, a streak beneath, and sometimes 1 on 

 the breast yellow, and a red dot below the scutellum ; female with the 

 colours usually reddish ; scutellum red, of the female occasionally edged 

 with yellow ; abdomen smooth, with the 2nd to 7th segments faintly edged 

 with whitish, beneath ochreous ; ovipositor black ; legs moderate, red ; 4 

 anterior in the male with the coxae and trochanters yellow ; posterior tarsi 

 black, their tibise rusty or whitish towards the base, black at the apex ; 

 wings hyaline ; cellule wanting. 

 Scarce : found in June at Darenth wood. 



tSp. 33. marginatorius. Niger, marginibus segmentorum 1 et 2 fascia latd 

 Jlava, segmentis reliquis suhJlavom,arginatis ; facie maculis thoracis iibiisque 

 Jiavis. (Long. corp. 3i— 41 lin. 5 Exp. Alar. 5^—7 lin.) 



