NO. 1206. ICHNEUMON FLIES— ASHMEAD. 81 



Posterior tibia; with 1 apical spur; cheeks long; metathorax areolated; trans- 

 verse median nervure in hind wings not broken. 



(619) Periope Curtis^ Monoj)kctroa Holmgren =^ 01! goplcdron Fijrster. 



2. Wings vithont an areolet 3 



AYings irith an areolet. 



Transverse median nervure in hind wings; metathorax punctate, areolated 



and uitli lateral carina; (620) Iscltyrocncmis Holmgren. 



(Type, Ischyrocnemis go'esi Holmgren.) 

 Transverse median nervure in hind wings angularlj' broken a little above 

 the middle; metathorax smooth, exareolated, without lateral carina;. 



(621) Ischyrocnemo2:)sis Ashmead, new genus. 

 (Type, Exochoides texarms Cresson. ) 



3. Transverse median nervure in hind wings broken below the middle; metathorax 



smooth, exareolated; second flagellar joint in male shorter than the first. 

 (622) Alcocervs Forster ^ Exochoides Cresson. 



4. Metanotum witlt areas at base; or with longitudinal carinse 5 



Metanotum without areas at base; the lateral carinje present. 



Wings without an areolet; the transverse median nervure in hind wings 



broken below the middle (623) Colpotrochia Holmgren. 



Wings icitJi a pentagonal areolet (624) Strongylopsis Brauns. 



5. First joint of fiagellum distinctly longer than the second 6 



First joint of fiagellum not or scarcely longer than the second. 



Metanotum with six areas (625) Hyperacmus Holmgren. 



6. Second abdominal segment ivithout a middle carina 7 



Second abdominal segment with a middle carina (626) Chorinseus Holmgren. 



7. Metanotum with the basal lateral area separated from the area dentipara bj^ a 



sharp carina 8 



Metanotum with the basal lateral area and the area dentipara confluent. 



Wings icith an areolet; metanotum with the basal and middle lateral areas 

 wholly continent; transverse median nervure in hind wings broken at 

 basal third (627) Triclistus Forster. 



Wings icithout an areolet; metanotum with the basal and middle lateral 

 areas more or less separated by a transverse carina; transverse median 

 nervure in hind wings broken at basal fifth. . . (628) Amesolytus Forster. 



8. Vertex not separated from the occiput by a sharp carina 9 



Vertex separated from the occiput by a sharp carina. 



Front wings with an areolet; metanotum wdth five areas. 



(629) Metacoclus Forster. 



9. iletanotum with three middle areas (630) Polyclistus Forster = Mima Davis. 



^letanotum with six areas and two middle areas... (631) Exochus Gravenhorst. 



Tribe VIII. TYLECOMNINI. 



1868. Trachydermatoids; Family 13, Forster, Verb. d. naturh. Ver. pr. Rheinl., 



XXV, pp. 142 and 161. 

 1894. Trachydermatini, Tribe VI, Ashmead, Proc. Ent. Soc. Wash., Ill, p. 277. 

 1897. Metopiim, Tribe (part), Davis, Trans. Am. Ent. Soc, XXIV, p. 197. 



This tribe was first separated by Forster under the name Trachy- 

 dei'matoid(X ; while Davis has inchided it with the MetopUni. 



Davis has made several serious blunders in his translations from 

 Forster, and in some cases his tables are totally wrong. His Trae/uj- 

 Proc. N. M. vol. xxiii (5 



