270 BRITISH ICHNEUMONS. 



describes it williin a few [)agcs of recording O. pallidipnlpis, wliich he, 

 consequently, evidently knew at the time, from Britain. It is quite 

 possible, however, that he sent his types for examination to Professor 

 Thomson, who {loc. cit.) united the species in 1891. Bridgman main- 

 tained their distinctness in 1893 (Trans. Norf. Nat. Soc). 



O. palUdipalpis was first taken in Britain, near Norwich, in July and 

 September, by Bridgman, who subsequently says it is not unconmion at 

 Eaton, Earlham and Household, in the autumn ; Bignell has found it at 

 Egloskerry in Cornwall towards the end of July. On the Continent it 

 occurs in Germany, Belgium and Sweden, but does not appear to have 

 been bred. H. striaius is not noted in Berthoumieu's " Monographic " ; 

 fjridgman took both sexes about Norwich — at Eaton, Earlham and 

 Brundall, in July and September; and Bignell informs me he has captured 

 it at Bickleigh in Devon. 



AETHECERUS, Wesmad. 

 Wesm. Nouv. Mem. Ac. Brux. 1844, pp. 166 et 203. 



Head hardly or moderately buccate ; vertex not broad ; frons impressed ; 

 face short, centrally protuberant ; clypeus broader than long, shining, 

 sparsely punctate, deeply discreted from face, its apex with a fovea in the 

 centre, laterally refiexed or denticulate ; mandibles broad, lower tooth the 

 shorter. Flagellum filiform ; scape elongate, sub-compressed, at base 

 generally broadly oblique, and, in $ , more or less dilated. Thorax stout ; 

 metathorax not produced posteriorly, completely and very distinctly areated. 

 Abdomen elongate-fusiform, or in $ parallel-sided ; second segment dis- 

 tinctly impressed ; terebra stout and but shortly exserted. Legs normal ; 

 hind coxae of $ usually with small scopulae. Areolet narrowed above. 



The following species are very closely allied ; I have found them difficult 

 to distinguish, and have considerable doubt as to their specific value. Six 

 other kinds are known on the Continent. 



Tabic of Species. 



Metathorax slightly produced apically i. LONGULUS, Wcsm. 



Metathorax not produced apically beyond in- 

 sertion of hind coxae. 



Head narrowed posteriorly ; 5 coxal cristulae 



acute 2. PLACIDUS, Wcsm. 



Head not narrowed posteriorly ; ? coxal cris- 

 tulae obtuse or wanting. 



Pronotum usually pale ; scape hardly {$) or 

 not ( ? ) dilated. 



Areola of 9 elongate; clypeus of (J black 3. nitidus, Wesm. 



Areola of 9 sub-quadrate ; clypeus of ^ white 4. DISCOLOR, Wesm. 



Pronotum black ; scape strongly {$)ox slightly 



($)dilated 5. dispar, ^Ft'.y;;^. 



I. longulus, ]Vesm. 



Aethecei-its /o/z^it/i/s, \Ycs,m. Nouv. Mem. Ac. Biiix. 1S44, p. 206 ; Eiiscli. Schr. Nat. 

 Ges. Danz. 1S78, n. 6, p. 59 ; Berth. Ann. Soc. Fr. 1896, p. 365, 9 ; Thorns. O. E. xv. 

 1642, 6 9; cf. Bridg. Trans. Ent. Soc. 1S81, p. 150. Fhaeogeiies formosus, Bridg. loc. 

 cit. p. 149, ? . 



