NO. 1206. ICHNEUMON FLIES— ASHMEAD. 1<) 



Clypeus anteriorly straight, truncate. 



Scutellum quadrate; antennal joints 12-1 (> dilated laterally. Male. 



(45) Ilypomecus Wesmael. 

 (Type, Ihjpomen(s alhitarsis Wof^macl.) 

 Scutellum not (juadrate; antennal joijits 12-16 not dilated laterally. 



Metathorax bidentate (49) AmUytele!^ Wesmael. 



Metathorax unarmed. (48) Piteudamhlyielci^ Ashniead. 



8. First abdominal segment at the elbow much swollen, gibbous, or angulated. 



(54) I'roholufi Wesmael. 

 (Type, Ichneumon fossorius Gravenhorst. ) 

 Fii'st abdominal segment at the elbow not gibbous or angulated. 



Scuttellum pyramidal (55) Pifrumklophorus Tisch1)ein. 



(Type, Pijramldo2:>horusflavoguttatus Tischbein. ) 

 Scutellum not pyramidal. 



Antennse very strongly serrate. Male. . .(56) Pristoccrus Gravenhorst. 



(Type, Pnstocerus serrarius Gravenhorst.) 

 Antennfe not strongly serrate. 



First abdominal segment neither liroad nor rugose its entire 



length 9 



First abdominal segment very broad and wholly rugose. 



(57) Rhi/ssolaMis Kripchbaumer. 

 (Type, PldtijiaUchos brnssicus Tischbein.) 



9. Areolet pentagonal (rarely subtriangular and briefly petiolate in some males. ) 



Scutellum laterally margined at the most only at the base, never to the middle. 

 Front tarsi unthout a single joint armed with fine spines. 



(58) i?((n/Za6Ms Wesmael. 

 (Type, Kurylabus torvus Wesmael. ) 

 FroTit tarsi with most of th(^ joints armed with fine spines. 



(59) Eristicus Wesmael. 



(Type, Ichneumon dericuH Gravenhorst.) 



Scutellum laterally margined to beyond the middle. (60) P/r(/v/r;/;».s- Wesmael. ) 



(Tyi)e, Plaiylabas rufus Wesmael.) 



Tribe III. LISTRODROMINI. 



1868. Listrodromoidu:, Family 32, Forster, Verb. d. naturh. Ver. pr. Rheinl., 



XXV, pp. 144 and 194. 

 1894. Lisirodromini, Tribe IV, Ashmead, Proc. Ent. Soc. Wash., Ill, p. 278. 



The species belonging to this tribe have the claws pectinate, never 

 simple; otherwise they are scarcely distinguishable from those found 

 in the J<)jj/)/'v/' and the leJineumonini. 



Forster placed in the group only two genera, NeotypuH and Listro- 

 dromus, while I have ventured to place here five other genera. 



TABLE OF (JENERA. 



Metathoracic sjiiracles, n lund or oval 4 



Metathoracic spiracles, large, elongate, forming a long slit, sometimes curved. 



Scutellum flat, or at most subconvex, never gibbous or elevated 2 



Scutellum elevated at ajjex and highly declivous; metathorax normal, unarmed. 



(61) Ctenochares Forster. 



