BRITISH ICHNEUMONS. I55 



Tidskr. 1S80. p. 83 ; Thorns. O. E. xviii. 1940 ; Berth. Ann. Soc. Fr. 1894, p. 588, 6 9 . 

 /. ciistodialor. Fab. E. S. ? . /. coiiipiiinior, Ste. 111. M. vii. 131 ; Mori. E.M.M. 

 1902, p. 119, <5. 



Head, thorax and abdomen nearly entirely black. Head with mouth 

 partly piceo-rufescent ; clypeus of ? somewhat closely punctate ; c^ with 

 facial orbits more often flavidous. Antennae of ? slender, setaceous, 

 ninth joint quadrate, usually entirely black, though sometimes broadly 

 red-banded ; of 6 black, more or less rufescent, the scape never flavous 

 beneath. Thorax entirely black in both sexes ; metanotum with complete 

 areae, of which the areola is sub-quadrate, broader in $, apically scal- 

 loped ; dentiparal areae with a short apical tooth. Scutellum strongly 

 punctate, convex, entirely black. Abdomen of $ entirely black, of $ 

 black, with segments six and seven, or one of them, with a linear glaucous- 

 white mark ; post-petiole aciculate ; gastrocaeli rugose, somewhat large 

 and deep, with the intervening space rugosely aciculate in S ', apical 

 segments nitidulous ; terebra somewhat exserted. Legs rather slender, 

 clear red, with all the coxae, hind tarsi and (?) apices of hind tibiae, black. 

 Wings a little clouded, stigma rufescent. Length, 14-17 mm. 



This species may be known by the fulvous femora and tibiae, the pos- 

 terior pair of tibiae and their tarsi black, scutellum convex and entirely 

 black ; the $ anus is rather acute, with two yellowish-white vittae, some- 

 times with one or the other wanting ; the cheeks and the apically truncate 

 clypeus rather closely punctate, antennae slender, setaceous, with no 

 distinct band : the S has the flagellum obscurely ferrugineous beneath, 

 the face sometimes with the orbits shortly pale. 



Compared with /. guaesitorius, which it most resembles, this species has 

 the thorax robust, rather elevated anteriorly ; scutellum punctate, entirely 

 black ; metathorax rugulose, its areola transverse, or in the ? occasionally 

 sub-quadrate with two distinct upper areae on either side, of which the 

 dentiparal are apically straight, not sinuate, somewhat produced into a very 

 short tooth at their apices. The abdomen is very like that of /. quaesitorius, 

 but in $ the anus is more strongly acuminate, and the terebra is shortly 

 produced beyond the apex. 



The $ at first sight is very similar to Clenuhjieujiion castigafor, but may 

 be told therefrom by the head being obliquely narrowed behind the eyes, 

 the face and clypeus longer, the scutellum more elevated, the metathoracic 

 spiracles a little longer, the post-petiole less dilated and convex, the second 

 segment distinctly narrowed towards its base, while in castigaior it is 

 parallel-sided ; and the gastrocaeli are less deep. 



The (? is also not unlikely to be confounded with that of C. cainelinus, 

 Wesm., from which it may be known by the hypopygium being more acute 

 and the hind tibiae not internally flavous. Thomson, nevertheless, says 

 (O. E. xix. 2082) that they are hardly distinguishable. Berthoumieu men- 

 tions a variety, presumably of the ? , which he calls impolliiius, having the 

 anal markings entirely wanting. 



Stephens says the $ is very rare, but had occurred near London, in 

 June, as well as in Norfolk ; Bridgman, however, did not there meet with 

 it ; Bignell took it, at Bickleigh, in Devon, early in June, and there are 

 males in Marshall's collection, from Lydford and Cornworthy. On the 

 Continent, where it is widely distributed, it has been bred from Vanessa 

 polychloros and Acronycia psi. 



