EVANIID.E. EVANIA. 117 



except in the 8th family in the present, which offers so many other 

 peculiarities as will almost remove it to the 2nd section. 



AntenncB 13-14.articulatffi: . , . , .4. EvAWiiDiE. 

 15-50-articulatffi, 



^/is aniicis areola 1 -ma magna: . . .6. IchneumoniDjE. 

 areolis 2-bus longitudinalibus. 



Palpis maxillaribus 5-articulatis : . . ,6. Braconid^. 



6-articuIatis: . . .7. Alysiid^b. 



4-articulatis : . . .8. Aphidiid^. 



Family IV.— EVANIID^, Leach. 

 Antennts with 13 or 14 articulations, filiform, or very slightly attenuated : 

 man,<i/Z»/e5 denticulate : maxillary pa/j5? filiform or setaceous^ 6-jointed; labial 

 4-jointed : head vertical : ocelli 3 : collar very short : thorax very convex : 

 metathorax shelving : abdomen inserted beneath the scutellum ; short and 

 clavate^ or elongate and somewhat linear: posterior tibia sometimes 

 clavate. 



The insects included in this family vary much among themselves, 

 the 2 typical genera having the abdomen remarkably small in com- 

 parison with the great bulk of the trunk : it is oval, compressed, and 

 abruptly supported by a slender elongate peduncle, which is inserted 

 close to the base of the scutellum, whereas, in the other genus, the 

 abdomen is considerably elongate, and of a gradually clavate form, 

 inserted by its smaller end beneath the scutellum ; the ovipositor of 

 the female is exserted, and the habit of the insect tends towards the 

 Glypt^, Xylonomi, &c. amongst the Ichneumonidse, while the typical 

 forms resemble the Cynipid^. 



The following genera are found in Britain : — 



Abdomen breve, abrupte petiolato, 



AlcB anticcB areolis discoidalibus : . . 35. EvANIA. 



nullis: . . 36. Brachygaster. 

 elongatum, gladatim clavatum : 



AlcB anticce areolis submarginalibus 2 : . . 38. Fcenus. 



1 : . .37. Paxyloma. 



Genus XXXV.— EVANIA, Fabricius. 



AntenncB approximating, slightly attenuated towards the apex, 13-jointed, 

 basal joint elongate, subclavate, 2nd minute, 3rd as long as the basal, 4th 

 slightly shorter, the remainder gradually decreasing to the 12th, the ter- 

 minal one as long as the 6th: ^a/pj unequal ; lahial viith the penultimate 

 joint sometimes dilated: head transverse: vicfathorax abruptly shelving: 



