Panarg)rops.\ BRITISH ICHNEUMONS. IO5 



liind ones sometimes vvilh the femora and tibiae externally and the tarsi, 

 or at least the apices of the tibiae, infuscate. ^\'int;s hyaline, radix and 

 tegulae stramineous; areolet externally incomplete; nervellus opposite 

 and not intercepted. Length, 4-5^^ mm. 



This species may be known from its allies having the abdomen centrally 

 striolate, by its incomplete areolet, sub-constricted head, and by its shorter 

 terebra and shorter abdominal segments. Cryptus pellucidator^ as known 

 nowadays, consists of the female doubtfully referred to it by Graven- 

 horst, and placed in the present genus by Thomson, and the male 

 afterwards described by the latter, since Gravenhorsl's typical $ is con- 

 sidered that of the earlier-described C. aereus ; the former has the central 

 segments obsoletely punctate, not striolate, and does not appear to have 

 been previously satisfactorily mentioned from Britain. 



Rare, taken near Andover by the Rev. G. T. Rudd ; near London in 

 June (Stephens), common in Norfolk (Bridgman), Bickleigh in Devon, 

 early in June (Bignell). There are several females in Dr. Ca[)ron's 

 collection from Shere in Surrey, and I have taken it at Ryde in the Isle of 

 Wight, a $, early in August. It occurs throughout northern and central 

 Europe and is, according to Brischke, always hyperparasitic — upon Aporia 

 crataegi, Pieris brassicae, and through a s[)ecies of Micro\:;aster upon Botys 

 ver/icaiis ; it may, however, have been directly parasitic upon Eupithccia 

 centaureata (cf. Schr. Ges. Nat. Danz. 1882, p. 338). 



4. pellucidator, Grav. 



Cryptus pellucidator, Gr. I. E. ii. 5S3, 9 . Leptocryplus pellucidator. Thorns. O. E. 

 X. 965, 9 ; xxi. 2388, (J , 



This species so exactly resembles P. aereus that the synonymy has 

 become much involved, and the two kinds so confused in 13ritish collec- 

 tions as to render it doubtful if the present species has ever been definitely 

 recorded from Britain ; this state of things is probably largely due to 

 Marshall's lack of discrimination in his catalogues. 



The distinction, however, when once indicated, is very apparent. The 

 second segment of P. pellucidator in both sexes is obviously and evenly 

 punctate, whereas in P. aereus it is distinctly aciculate ; besides this the 

 former has the terebra longer than half the abdomen with the two anal 

 segments (always pale in P. aereus) distinctly infuscate. Than /-*. tenuipes 

 the female is much more slender with longer terebra, and both sexes are 

 more distinctly pubescent throughout. 



This species is much the commonest of the genus in Britain, though 

 only recorded from Sweden and Germany on the Continent, where it does 

 not appear to be sufficiently understood, and probably most of our records 

 under P. aereus refer to it. I possess it from Shere (Capron), Cornworlhy 

 (Marshall), Exeter at the end of September (Bignell), Felden in Herts. 

 (Piffard), Abinger Hammer in Surrey, in August (Butler), Tostock in 

 Suffolk, early in Septemiier (Tuck) ; and I have found it at Lakenheath 

 and Assington in June, and at Covehithe in October, by general sweeping 

 (all in Suffolk). Evans has taken it at Bolton, near Edinburgh, in June. 



