INTRODUCTORY PAPERS ON ICHNEUMONID^. 181 



Head and thorax black, more or less marked with red or yellow ; legs and 



abdomen reddish yellow, more or less marked with black. 

 Scutellum black (male and female). - - 1. amicta, 8 — 13 lines. 



Wesmael, in his "Revue cles Anomalons de Belgique" (Bull. 

 Ac. Brux., vol. xvi., pt. 2, pp. 115 — 139), subdivided Graven- 

 horst's very natural genus Anomalon into five subgenera: — 

 Schizoloma, Heteropclma, Exocldlum, Anomalon, and Trichomma. 

 These are adopted in Holmgren's classical ' Monographia 

 Ophioniduni Sueciae,' and in Marshall's Catalogue ; but Vollen- 

 hoven has lately written, "in our opinion Wesmael's sub- 

 genera . . . have no claim to be retained as genera" (Pinacog., p. 6). 

 Taschenberg merely adopts them as subgenera (Hym. Deutschl., 

 p. 71). The single species of the genus is not uncommon in 

 Britain. The male is well figured by Curtis (Brit. Ent., pi. 736) ; 

 and a small female, with details, by Vollenhoven (Pinacog., pi. 3, 

 figs. 5 — 5 c). Several of Ratzeburg's species, bred from Sphinx 

 pinastri, and Desvignes' A. capitatum, probably belong to this 

 genus, if they are distinct from S. amicta. The larva of this 

 species makes a very thin cocoon, and emerges direct from the 

 pupa of its host. It is solitary in its parasitism, and has been 

 bred as follows : — 



Callimorpha dominula ; Buchecker Coll. Orgyia pudibunda ; Brischke. 

 Demas coryli ? ; Marshall Coll. Bombyx rubi ; (Speyer) Ratzeburg. 

 Cnethocampa processionea ; (Richter) Gravenhorst, (Baer) Ratz. 

 Pygsera bucephala ; iReissig) Ratz. Eupithecia linariata ; Bignell. 

 Xylina rhizolitha ; (Perris) G-iraud. Cucullia sp. ? ; (Bond) B. M. 

 Coll. Halias prasinana ; Brischke. 



Exochilum, Wesm. 



Scutellum yellow, rarely black (male and female). 



1. circumfleomm, 8 — 10 lines. 



This genus also contains but one species, the fine and not 

 uncommon E. circumflexum. Its female is figured by Holmgren 

 in the Swedish " Ofversigt " (vol. xiv., pi. ii., fig. 2) ; and charac- 

 teristic details are given in ' Pinacographia,' pi. 3, figs. 6, G a. See 

 also Ratzeburg's figures, 'Die Ichn.,' vol. i., pi. vi., fig. 2; and 

 'Die Waldverderber,' pi. i., fig. 6; and Donovan, pi. 93, 2. 

 Ratzeburg traces and figures the details of this species from the 

 egg in his ' Die Ichneumonen, 1 vol. i., pp. 80 — 87 ; pi. ix., 

 figs. 11 — 22; and 'Die Waldverderber,' pi. i., fig. 6 l, pi. iii., 

 fig. S". This should be consulted as a typical life -history of the 



