PTEROMALIDAE OF N.W. EUROPE 801 



Brdy mountains, vii.1959 (/. Macek), in Narodni Museum, Prague (Cat. no. 2972). 

 Placed in synonymy with laeta (Walker) by Boucek (19656 : 549). 

 The male of laeta is unknown. 



Britain, Czechoslovakia. 



Biology. Unknown. Imagines in July. 



TRITNEPTIS Girault 



Tritneptis Girault, 1908 : 92. Type-species : T. hemerocampae Girault, by monotypy and 



original designation. 

 Tritneptis Girault ; Gahan, 1938 : 213-219. 

 Tritneptis Girault ; Nikol'skaya, 1952 : 229. 

 Tritneptis Girault ; Peck et al., 1964 : 51. 



This genus is very close to Dibrachys Forster, from which it differs chiefly in the 

 immarginate occiput. It was in fact synonymized with Dibrachys by Girault 

 himself (1926 : 63). In 1938 Gahan treated Tritneptis as a valid genus, gave a 

 key to the North American species, and corrected the synonymy. No revision of 

 the European species has appeared, though certain collectors have been aware for 

 some years that several species occur in this region. I give below a tentative key 

 to those which I have been able to examine critically. Before a complete revision 

 can be achieved, however, it may be necessary to examine the types of some 

 American species and much more material from Europe than is available to me. 



Key to European Species 

 (Females) 



1 Head thick antero-posteriorly, only about 1-75 times as broad as its maximum 



length ; temples, in dorsal view of head, more than half as long as eyes ; 

 antennal scrobes deeply excavated. Gaster shortly ovate to subcircular, 11- 

 1-4 times as long as broad, broader than but only slightly longer than the 

 thorax, nearly always more or less reddish basally. Marginal vein 2-5-3 

 times as long as the stigmal vein . . . lophyrorum (Ruschka) (p. 802) 



Head more transverse, 1-9-2 times as broad as its maximum length in dorsal 

 view ; temples at least slightly less than half as long as eyes ; antennal 

 scrobes less deep. Gaster usually relatively longer, not reddish basally. 

 Marginal vein at most about 23 times as long as the stigmal vein . . 2 



2 (1) Fore wing with marginal vein about 2-3 times as long as the stigmal vein. Head 



in dorsal view with temples rather more than one third as long as eyes. 

 Anterior margin of clypeus broadly but shallowly emarginate . sp. indet. (p. 803) 

 Fore wing with marginal vein 175-2 times as long as the stigmal vein. Head in 

 dorsal view with temples one quarter to one third as long as eyes. Anterior 

 margin of clypeus less broadly but more deeply emarginate ... 3 



3 (2) Apical margin of fore wing completely bare all round. Gaster hardly as long as 



head plus thorax, slightly broader than the thorax, 1-35-1-6 times as long as 

 broad. Head shaped much as in Dibrachys lignicola (Text-fig. 668), with 

 temples about one third as long as eyes and converging only moderately. 

 Legs, apart from the coxae, usually testaceous, occasionally the femora 

 infuscate ........ diprionis Gahan (p. 803) 



