121 



Var. tliorace dorso tantiim rufo. Mas. Long. 2^ lin. 

 Inhabits North Carolina. In the cabinet of the Entomological Club. 



3. Hi/p. rujiceps. Nigrum : capite, antennarum scapo, prothorace 

 subtus, pedibusque quatuor anticis rufis : metathorace posteriorc 

 dense sericato. Mas et Fem. Long. 2^^ lin. 



Inhabits Brazil. In my own collection. 



I am acquainted with other species. 



Section II. Abdomen originating gradually from metathorax, and inserted close- 

 ly beneath the postdorsolum : claws simple. 



Genus 4. — Fcenus, Fabr. 

 Type. Ichneumon jaculator, Linn. 



I have several species of this genus, but there is not room to de- 

 scribe them at present here. 



Family. — Aulacid^, Shuckard. 



Head usually large and subglobose or flattened above, and attached 

 to the prothorax by a distinct neck. Antenna? elongate, usually slen- 

 der and tapering to the extremity, inserted above the clypeus near the 

 middle of the face, and 14- or 24-jointed. Mandibles robust, with 

 three regular teeth, the external one the largest and the most acute. 

 Max. palpi with 6 and lab. palpi with 4 joints, the terminal ones of the 

 former slender, and of the latter subsecuriform. Superior wings with 

 three or four submarginal cells and two recurrent nervures. Abdo- 

 men attached to the metathorax by an elongation of the latter, always 

 projecting beyond the posterior coxae, the former either elliptical or 

 subfiisiform, slightly clavate. Four posterior tibia) with two calcaria 

 at the extremity of each, and tarsal claws small, and either serrated or 

 bifid. 



Superior wings with 



Four submarginal cells and claws bifid ; 



Ventral segments plane 1. Trigonalys. 



Second ventral segment produced posteriorly beneath 2. Lycogaster. 



Three submarginal cells and claws serrated 3. Aulacus. 



Genus 1. — Trigonalys, Westw. 

 Type. Trig. Melanoleuca, Westw. 

 In addition to the brief generic character given by Mr. Westvvood, 



