N<>.i.2or,. ICHNEUMON FLIES— ASHMEAD. 51 



Flagellnm with the joints composing the apical half distinctly separable; ovi- 

 positor at the most as long as the abdomen. 

 Last half of the flagelhnu in the females with knob-like joints, appearing 

 qnite different from the basal half; the knob-like apical joints are 

 as wide as long, almost rhomboidal, seen from beneath angnlate, 

 the last joint narrower and scarcely as long as the preceding. 



(318) Xenacis Forster. 



The apical third only of the flagellum with distinctly separable joints; the 



terminal joints are also not knob-like, bnt only faintly compressed, 



above and beneath ronnded, the last joint wider and as long as the 



two preceding joints united; abdomen perceptibly narrowed toward 



base, subi^etiolate (319) Crijptopimj^la Taschenberg. 



] ."). Frons mthout horns 14 



Frons with two horns. 



Areolet longly petiolate; hind wings with the transverse median nervure 

 broken below the middle; mesonotum without trace of furrows; scu- 

 tellum laterally no< margined; metapleural carina distinct jiosteriorly, 

 the spiracles long, linear; abdomen with the first segment laterally 

 toward base with two strong carinae, the spiracles jilaced before the 

 middle and distinctly visible from above ...(320) Diceratops Forster. 



14. Clyjieus vot impressed ; areolet usually petiolate 15 



Clypeus at base posteriorly strongly impressed, the impression so covered with 



long hairs as to form a tuft; metanotum in female with a weak, 

 transverse apical carina, stronger in male; metapleural carina faint, 

 nearly obliterated; areolet sessile, irregularly pentagonal ; spiracles 

 of second abdominal segment placed close to the base; claws 

 simple (321 ) Ensimus Forster. 



15. Metapleura not separated from the metanotum by a carina, the spiracles large, 



elongate or linear; areolet longly petiolate; transverse median nerv- 

 ure in hind wings broken below the middle; face more or less 

 swollen; mesonotum without trace of furrows; scutellum laterally 

 margined only at base; first abdominal segment smooth, the spira- 

 cles placed before the middle; claws with al)breviated teeth and 



long bristles (322) Zyzeuctus Forster. 



Metapleura separated from the metanotum l)y a carina, the spiracles round or 



short oval 16 



K). Claws distinctly but not closely pectinate (323) Lissonota Gravenhorst. 



17. Areolet petiolate, rarely sessile; disco-cubital nervure angulate or angularly 



broken and usually with a stump of a vein 18 



Areolet sessile; disco-cubital nervure bowed or strongly curved, never angulate 

 and witliovt a stump of a vein. 

 Claws shortly pectinate; transverse median nervure in hind wings broken 



below the middle (324) Meniscus Schiodte^^memiia Forster. 



1 S. iSIetathorax normal without longitudinal carinpe 19 



JNIetathorax with 6 longitudinal caringe (325) Phidias Vollenhoven. 



19. Frons above the antennae normal, not at all impressed and without peculiar' 



fovese; metapleural carin;e wanting or only faintly indicated at 



base '. 20 



Frons above the antenna impressed or concave, with the margins swollen on 

 each side; metapleural carinpe distinct; transverse median nerviire 

 in the hind wings angularly broken below the middle; claws stout, 

 pectinate, but not thickly; first al)dominal segment with two carime 

 at the basal third.. (326) Bathycetes Forster = Bat hynophrys Forster. 



20. Areolet sessile; metathorax with the apical transverse carina present, distinct. 



(Female) (327) Alloplasta Forster. 



