22. 

 IBALIA CULTELLATOR. 



Order Hymenoptera. Fam. Dij)Iolepida3 Lat., Leach. 



Type of the Genus Ichneumon Cultellator Fah. 

 Ibalia Lat., III. Ichneumon. Ophion, Banchus Fab. Cynips Jur. 



Antennce m^QxieA. in the centre between the eyes, approximating; 

 filiform, composed of 15 joints in the male ; third joint bent, 

 clavate, emarginate on the external edge (f. 1 .) ; a little clavate, 

 13-jointed in the female (1. a.), second joint very small. 

 Labrum corneous, small, transverse, arcuated before, emarginate 

 in the centre. (Lat.) 



Mandibles thick, nearly quadrate, tridentate on the internal 

 side in one mandible and bidentate in the other, apical tooth 

 more acute, inferior broad, truncate. (3.) 



Maxillce very broad in the middle, terminal process broad at 

 apex, slightly bilobed, ciliated : Palpi short, 5 -jointed, first and 

 fourth small, second and last large, nearly obtrigonate rounded 

 at apex, hairy. (4.) 



Mentum pear-shaped. (5. a.) Palpi short, hairy, 3-jointed, ter- 

 minal joint equal in length to the other two. (b.) Lip small, 

 concave, nearly circular, (c.) 

 Head transverse, as broad as thorax, vaulted behind. Ocelli 3. Tlio- 

 raxjlat, slightly compressed. Scutellum bifid behind. Abdomen 

 attached by a very short peduncle, very much compressed, knife- 

 shaped, being very sharp on the under side, with a puncture or sj)i' 

 racle on each side of last joint, the male Q-jointcd, of nearly equal 

 size, very much vaulted. (7.), the female 5-joinfed, the last being 

 equal in size to the first four, with 2 elongated lamince, between 

 which a capillary oviduct passes, and is curved over the back. (6.) 

 Superior wings with no decided stigma, costal iierve very distinct, 

 one marginal cell, linear-lanceolate ; 3 submarginal cells, jirst small, 

 oblong, second extremely minute, third large, complete; inferior 

 wings with one nerve branched near its extremity, four anterior feet 

 short and slender ; cox« oi posterior legs large, thighs short, robust, 

 tibiae very long, first joint of tarsus very long, second small, produced 

 into a spine on the external side (8. a.), third and fourth small, fifth 

 longer, slender (8. posterior leg of a male) : all the tarsi b-jointed, 

 terminated by pulvilli and claws scarcely unidentate. 

 The dissections of the mouth were made from a female , of which the 

 labrum was lost; the ovipositor is probably represented too short, from 

 the specimen being imperfect. 



CuLTKLLATOR Fab. Eut. Syst. t.2. p. 167. n.I42. 



Black, hairy, rugose, head and thorax striated transversely, the 

 latter with the anterior margin elevated, and three longitudinal 

 grooves down the back. Abdomen bright ochraceous, shining. 

 Legs fuscous, hinder thighs tinged with chesnut colour. Wings 

 obscure. 



In the Author's Cabinet. 



