22. 

 IB ALIA CULTELLATOR. 



Order Hymenoptera. Fam. Diplolepidas Led. 

 Type of the Genus, Ichneumon Cultellator Fab. 

 Ibalia Lat., III., Curt. — Ichneumon. Ophion, Banchus Fah. — Cynips 

 Jur. — Sagaris Panz. 



Antennce straight, inserted in the centre of the face between the eyes, 

 approximating, fihform, composed of 15 joints in the male; third 

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

 clavate and 13-johited in the female (1. ? .), second joint very small. 

 Labrum corneous, minute, 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 most acute, in- 

 ferior broad, truncate. (3.) 



Maxilla very broad in the middle, terminal lobe broad at the apex, 

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

 fourth joints small, second and fifth large, elongate-obtrigonate, 

 rounded at the apex. (4.) 



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

 joint equal in length to the other two. {b.) Lip small, concave, 

 nearly circular, (c.) 

 Head transverse, as broad as the thorax, concave behind. Ocelli 3. Thorax 

 elongate-ovate, flat, slightly compressed. Scutellum subquadrate, bituber- 

 culate. Abdomen attached by a very short petiole, very much compressed, 

 knife-shaped, being very sharp on the under side, with a puncture or spi- 

 racle on each side of the last joint ; composed of 6 joints, of nearly equal 

 size, very much arched in the male. (7.) 5th and 6th joints the largest in 

 the female with 2 elongated lamince, between which a capillary oviduct 

 passes, and is curved over the back. (6.) Superior wings ivith no de- 

 cided stigma, costal nerve very distinct, one marginal cell, linear-lanceo- 

 late ; 3 submarginal cells, first small, oblong, second extremely minute, 

 third large, complete ; inferior wings with a nerve branched near the ex- 

 tremity, four anterior feet short and slender : coxae of 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. «.), third and fourth 

 small, fifth longer, slender (Sf hinder leg of male) : tarsi 5-jointed, ter- 

 minated by pulvilli, and claws. 

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

 was lost; the ovipositor was represented too short, in the 1st edition, from 

 the specimen being imperfect. 



Cultellator Fa6. — Curt. Guide, Gen. 563. 1. 



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

 with the margin of the collar elevated, and three longitudinal grooves 

 down the back. Abdomen bright ochraceous, shining. Legs black 

 or fuscous, hinder thighs tinged with chestnut colour. Wings pale 

 yellowish-fuscous : nervures strong and dark. 

 In the Author s Cabinet. 



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