NO. 1206. ICHXEVMON FLIES— ASHMEAD. 11 



first segment placed at or a little Jirjin-f tin- middle, -rarely slightly 

 behind the middle. 



Abdomen elongate, subcylindrical, most frequently sessile, rarely jietiolate 

 or subcompressed at apex; ovipositor always prominent, often very 

 long; areolet in front wings, when present, usually rhomboidal or tri- 

 angular, very rarely pentagonal Subfamily III. pimplix.e. 



Abdomen not or rarely very long, depressed, and sessile, fusiform, clavate, 

 ovate, or oval, more rarely distinctly petiolate; ovipositor hidden, 

 never prominent, at the most subexserted; areolet triangular, rhom- 

 boidal or wanting, rarely pentagonal Subfamily IV. tryphonin^. 



Abdomen usually long, wholly compressed or compressed along the posterior 

 half, rarely subcylindrical; in the latter case the petiole is somewhat 

 abruptly dilated at apex; spiracles of first segment most frequently 

 placed at or behind the middle, more rarely before; areolet in front 

 wings usually triangular, rhomljoidal or wanting, often petiolate; ovi- 

 positor either hidden or prominent Subfamily Y. ophioxin^. 



Subfainily I. ICIIlSrETJ]MO]SrilSr.S:. 



1900. lchneumonlnA\ Subfamily I, Ashmead, Smith's Insects New Jersey, \). 563. 



To this subfamily belong Forster's families Trogoidce {= Joppinae 

 Kriecbbaumer), IcJnttumonoidw^ Listrodromoidce., AJomyoidw^ aud 

 PhcBogenoidce^ which, however, are here recognized as tribes, since 

 they represent natural minor groups. 



The tribes recognized in this subfamil}^ may be separated by the use 

 of the following table: 



TABLE OF TRIBES. 



Metathoracic spiracles round or circular, more rarely l)i-oadly oval; claws simple, 

 never pectinate 3 



Metathoracic spiracles linear or long-oval, but very rarely rounded; if rounded the 

 claws are always pectinate. 



Mandililes not bidentate, simple, edentate, acute at apex 2 



Mandibles bidentate; head not broader than long. 



Metanotum with a strong constriction or furrow between it and the post- 

 scutellum, the metanotum usually short, with a median elevation 

 toward base and without the basal or first median area, or, if at all 

 present, open; areola often reduced to a tubercle, or if defined 

 usually confluent with the petiolar area, rarely distinct, horse-hoof 

 shaped or broadly transverse; scutellum variable, frequently cone- 

 shaped, pyramidal, or highly convex, rarely very flat; sutures 

 between the abdominal segments often strongly constricted; areolet 

 in front wings tetragonal, triangular, or pentagonal (rarely wanting). 



Tri])e I. Joppixi. 

 3Ietanotum without svich a constriction or furrow, at most with only a weak 

 furrow between it and the postscutellum; metanotum rarely short, 

 always ^vithout a median elevation at base and with the basal or first 

 median area distinct, usually complete, the areola and petiolar are 

 separated, distinct, abdomen normal, not or rarely strongly con- 

 stricted between the segments; areolet in front wings jientagonal. 

 Claws simple; second and third abdominal segments tvitli lunukc. 



Tribe II. IciiXEtMoxixi. 

 Claws pectinate; second and third abdominal segments most freciuently 

 without lunulte or at least not present on both segments. 



Tribe III. Listrodkomixi. 



