58 



BRITISH ICHNEUMONS. 



femora black, the tibiae sometimes rufescent towards the base. Length, 

 10-14 mm. 



It may be distinguished by the rugosity of the second segment, black 

 scutellum and distinct gastrocaeli from its allies ; and from Thomson's 

 C. pallitarsis by the fact that the tarsi are always black or fuscous. 



The coloration of this species is very variable, and a large number of 

 forms have been indicated. The $ may have the facial orbits white, with 

 which is sometimes, though not always, combined (i) entirely red femora, 

 of which the hind ones may, or may not, be apically black ; (2) a whitish 

 mark on the front coxae ; (3) a white line before the radix. In other 

 specimens the tibiae are all mostly red, the anterior having an external 

 pale dot before the base. There are two distinct forms of the ? , that 

 having the frontal orbits red or testaceous, which Gravenhorst confounded 

 with C. ajundator ; and that having the face in part obscurely red, with a 

 pale mark on either side beneath the antennae, and the scape red beneath. 

 Both sexes vary in having (i) the posterior femora partly red ; (2) all the 

 femora entirely red, which was Gravenhorst's /. ae/hiops, $, or (3) in 

 having the scape of the antennae red or stramineous beneath. 



It is a common species on the Continent and probably also in Britain. 

 Curtis records it from near Covehithe, in Suffolk, and Stephens says it is 

 not uncommon in woods and hedges, upon umbelliferous flowers, within 

 the Metropolitan district, in June and July, and that the van aethiops is 

 also found, in July, in Norfolk, in which county Mr. F. Norgate has since 

 found it at Sparham (Bridgman). Bignell bred it, in S. Devon, from 

 Abraxas grossidariata ; Desvignes from Taefiiocanipa mhdosa ; Stephens 

 from Plusia gatntna and F. festucae ; while on the Continent, where the 

 female is known to hibernate, many hosts are recorded, such as Eriogaster 

 ianesiris, Angerona priitiaria, Macaria /iturata, M. signaria, Fidonia 

 piniaria, Clostera reclusa, several times from Trachea pitttperda, and various 

 unknown Noctuids. Guestling, near Hastings (Bloomfield) ; Scotland, 

 loth June, 1900 (Dalglish) ; Felden, Herts. (Piffard) ; Parfitt, beat it from 

 hedges, in Devon, in June ; and I have beaten it from young birch bushes, 

 not rarely in Bentley Woods and Assington Thicks, Suffolk, early in June ; 

 it is also recorded from Essex. 



7. liostylus, Tho?ns. 



Ichneiunon Uoslylus, Thorns. Ann. Soc. Fr. 1887, p. 12, c? 9 . /. inpdus, Berth. !ib. 

 dt. 1895, p. 262 (? totus). Craddmewnon liostylus. Thorns. O. E. xviii. 1950 ; xxi. 

 2402. 



Black, antennae white-banded ; ? with hind coxae distinctly scopu- 

 liferous, tibiae semi-annulated with white and the post-petiole centrally 

 smooth and shining ; $ with the palpi, the sides of the face and of the 

 clypeus, white. 



This species is very like, and is closely allied to, C. fabricator, from 

 which the ? differs in having the antennae less stout and the hind coxal 

 scopulae a little smaller ; the areola is a little longer but less definitely 

 dehneated above. The sculpture of the abdomen and of the thyridii is 

 similar to that of C. an?iu/ator, but the central area of the post-petiole is 

 twice broader than the lateral ones and, in both sexes, glabrous ; the c^ 

 differs from that of C. annulator in having a three- or sometimes even 



