4 i8 M. W. R. de V. GRAHAM 



with the quantity of food available to the host larva. Large specimens tend to have 

 bold wing-markings and relatively paler legs, small specimens have the wing- 

 markings reduced and the legs darker. C. intermedins Forster was regarded by 

 Russo as merely a small form of colon [= quadrum]. 



Extra-limital species incorrectly referred to Cheiropachus 



Cheiropachus genualis Walker (1862 : 389, $ ; type locality, Port Natal, Africa) is 

 represented in BM(NH) by the type $ (Type Hym. 5. 677). It appears to belong 

 somewhere in the neighbourhood of the genus Picroscytoides Masi. 



METACOLUS Forster 



Metacolus Forster, 1856 : 65, 70. Type-species : M. unifasciatus Forster, by monotypy. 

 Pterosema Forster, 1878 : 44. Type-species : P. varicolor Forster, by monotypy and original 



designation. 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 

 Metacolus Forster 



Thomson, 1878 : 32, 36. 

 Schmiedeknecht, 1909 : 316, 317-318. 

 Kurdjumov, 1913 : 4. 

 Mercet, 1926 : 41-47. 

 Ferriere, 1948 : 529-530. 

 Nikol'skaya, 1952 : 215-216. 

 Boucek, 19576 : 75-76. 

 Hedqvist, 1963 : 97 — 102. 

 Peck et al., 1964 : 43. 



The genus Pterosema Forster was placed in synonymy with Metacolus by Boucek 

 (1957& : 76). 



Key to European Species 



(Females) 



1 Fore wing with a fuscous band extending from the marginal vein, usually at least half 

 way across the wing. Antennae with combined length of pedicellus and fiagellum 

 slightly greater than breadth of head ; pedicellus not, or only slightly, longer than 

 first funicular segment ; proximal segments of funicle at least slightly longer than 

 broad ......... unifasciatus Forster (p. 419) 



- Fore wing immaculate. Antennae with combined length of pedicellus and fiagellum 



slightly less than breadth of head ; pedicellus distinctly longer than first funicular 

 segment ; proximal segments of funicle quadrate to very slightly transverse 



azureus (Ratzeburg) (p. 419) 



(Males) 



1 Fore wing with a fuscous band (as in $) . Combined length of pedicellus and fiagellum 



about equal to breadth of head .... unifasciatus Forster (p. 419) 



— Fore wing immaculate. Combined length of pedicellus and fiagellum slightly less 



than breadth of head ...... azureus (Ratzeburg) (p. 419) 



Burks (1965 : 116-119) gives some information about the characters which 

 distinguish the North American Metacolus fasciatus Girault from the European 

 species mentioned here. 



