240 BRITISH ICHNEUMONS. 



(6). 5. Petiolar area broad and deeply excavate ... 3. FURUNCULUS, f^^jw. 



(5). 6. Petiolar area only slightly impressed. 



(8). 7. Face not black ; post-petiole centrally i^la- 



brous 4. ARRIDENS, Cra?/. 



(7). 8. Face black ; post-petiole centrally aciculate 5. distinctus, Bridg. 



I. brunnicornis, Grav. 



Ichueiiuton hnininconiis, Gr. I. E. i. 145 ; Stc. 111. M. vii. 136 ; Ratz. Ichn. d. 

 Forst. i. 134. Hcrpestoniits brtimiiconiis, Wesiii. Nouv. Mem. Ac. Brux. 1844, p. 170 ; 

 Holmg. Sv. Ak. Hancll. 1854, p. 44 ; Ichn. Siiec. iii. 377 ; Thorns. O. E. xv. 161 7 ; 

 Berth. Ann. Soc. Fr. 1S96, p. 347, i ^ ; (f. Voll. Schets. I. pi. iii. f. 12. 



Head black, with the vertex somewhat deeply emarginate ; palpi and 

 mandibles pale ; facial orbits narrowly flavous ; $ with clypeus and face 

 stramineous. Antennae filiform, about half length of body ; usually ferru- 

 gineous throughout, sometimes darker above and, in $, stramineous 

 towards the base beneath. Thorax stout, black ; notauli distinct ; lateral 

 sternal sulci deep and very determinate ; areola obcordiform ; petiolar area 

 slightly excavate, discreted and transversely striate ; $ usually with pro- 

 notum fulvescent and a white dot before the radix. Abdomen punctate, 

 black; post-petiole roughly punctate, sub-aciculate, its apical angles obtuse; 

 gastrocaeli large and deep ; third segment transverse ; terebra stout and 

 slightly exserted ; $ with incisures of central segments testaceous. Legs 

 normal, rufescent, with paler trochanters ; apices of hind tibiae, tarsal 

 joints and often the coxae, infuscate ; $ with anterior coxae and tro- 

 chanters flavous and hind femora apically nigrescent. Stigma clear brown; 

 tegulae pale. Length, 5-7 mm. 



Found, not rarely, near London, in June and July (Stephens). It has 

 also been taken in Essex and Devon, but is not recorded from Norfolk. 

 Tuck has captured it, at Tostock, in Suffolk, in September ; Piffard, at 

 Felden, in Herts. ; and I have beaten it, from Finns sylvesiris, in Bentley 

 Woods, near Ipswich, early in April, probably after hibernation. It is, I 

 expect, a common species with us, and is widely distributed on the Con- 

 tinent, where it has been bred from Hyponomeuta pndella^ H. malinella, 

 H. evonymella and H. cognatella ; the late Rev. J. Hellins bred two 

 females, which I have examined, towards the end of July, 1896, from the 

 first-named host, the larva having been taken at Chichester. 



2. nasutus, Wesm. 



Herpettonms nasutus, Wesm. Nouv. M(5m. Ac. Brux. 1844, p. 170 ; Bui. Ac. Brux. 

 1848, p. 314 ; Thorns. O. E. xv. 1617 ; Berth. Ann. Soc. Fr. 1896, p. 348, i> 9 . Var. 

 H. iiiterniediiis, Wesm. loc. cit. , ? . 



Head black ; face protuberant ; cheeks not buccate ; mandibles red in 

 $ ; in (J, as well as the palpi, a facial fascia and sometimes a part of the 

 apically truncate clypeus, flavous. Antennae sub-filiform, apically at- 

 tenuate, dark ferrugineous becoming paler, and in $ flavous, towards the 

 base beneath. Thorax somewhat short and gibbous ; pronotum and 

 callosities at radix white; notauli short; areae distinct and, in $, with 

 elevated costae. Scutellum black. Abdomen black ; of $ with sides 

 and apex of the very broad, dull and closely punctate post-petiole, and 

 segments two to four red ; $, with segments two to seven laterally and 



