British Braconidce. 79 



The genus Rhogas, Nees, was divided by him into 

 three sections (Act. Ac. L. C, 1818, p. 306), comprising 

 very dissimilar insects. The first and third sections 

 have the clypeus contiguous to the mandibles, the former 

 being co-extensive with the Macrocentrides, and the latter 

 {Ademon, Hal.) agreeing better with the Opiides, accord- 

 ing to the views of Wesmael and Keinhard ; but it was 

 placed by Haliday between Rhogas and Clinocentrus. 

 The second section, " Species genuinge " of Nees,_ has 

 been subdivided into five genera, all of which are British, 

 and may be synoptically represented as follows : — 



4) 1. Suturiform articulation obsolete. 

 (3) 2. Second cubital areolet rectangular ; abdomen 



longer than the head and thorax, of the J 



strongly compressed from the 2d segment ; 



terebra subexserted ii. Pktalodes. 



(2) 3. Second cubital areolet trapeziform ; abdomen 



not longer than the head and thorax, of the 



5 only subcompressed at the apex ; terebra 



considerably exserted i. Clinocentrus. 



(1) 4. Suturiform articulation distinct, crenulate. 



(6) 5. Third joint of the maxillary palpi dilated in- 



ternally, securiform ; terebra exserted . . iii. Pelecystoma. 

 (5) G. Third joint of the maxillary palpi simple; 



terebra subexserted. 

 (8) 7. First abscissa of the radius longer than the 



second ; in the 2 , segments 4 and following 



retracted and concealed beneath the 3d . . iv. Heteeogamus. 



(7) 8. First abscissa of the radius shorter than the 



second ; in the J , segments 4 and following 



not retracted and concealed beneath the 3d v. Rhogas. 



i. Clinocentrus, Hal. 



Hal., Ent. Mag., i., 266 (1833) ; iv., 94. 

 Abdomen ? oblong-ovate, not longer than the- head and thorax, 

 convex above and subcompressed at the apex, segments 1—3 sub- 

 equal, occupying about I of the total length, the rest being very 

 short ; spiracles of the 1st segment medial ; suturiform articulation 

 obsolete ; sides of the mesothorax impressed with a deep furrow ; 

 1st cubital areolet hexagonal, one of its shortest sides, the lower, 

 always decolorous, the rejected transverse nervure falls exactly on 

 the inner end of this side ; 2d cubital areolet trapeziform ; terebra 



i I the length of the abdomen. Abdomen 3 more linear, de- 



Ijressed, segments 1—3 occupying about j of its length. 



This genus is intermediate between the Exothccidcs 

 and the true Rhogadides, showing afdnity to the former 



