N().i20f.. ICHNEUMON FLIES— ASHMEAD. 31 



Metanotum vol (!oar?ely rugose, the first and second lateral areas 

 confluent; first abdominal segment not striate. 



(152) Oj>hidnn.f Fiirster. 



23. Lower tooth of mandibles very small and iducIi shorter than the upper tooth. 



( 1 53 ) TloinoOwrus Forster. 

 Lower tooth of mandibles equal, or nearly, with the ui)per tuoth. 

 Posterior tibia' and tarsi normal, not spinulose. 



First three segments of abdomen finely coriaceous, the second a little 



longer than the third ( 154 ) I^immachus Forster. 



= Stenocryptuft Thomson. 

 First three segments of abdomen smooth, the second and third of an 



equal length ( 155 ) Phygadeuon Gravenhorst. 



Posterior tibiae and tarsi spinulose. 



Metathorax bidentate (156) Tr(tch!ipJniriiH Ilaliday. 



24. Spiracles of the second and third abdominal segments jilaced close to the lateral 



margin 25 



Spiracles of the setujnd and third alidominal segments placed away from the 

 lateral margin 26 



25. Scutellnm very flat ( 157 ) Terpiphora F(")rster. 



Scutellum convex ( 158) Scinasropus F(")rster. 



26. Third abdominal segment not longer than the second 27 



Third abdominal segment longer than the second (159) Medophron Forster. 



27. JNIetanotum with the areola most frequently hexagonal, never pentagonal, the 



basal area never triangular 28 



Metanotum with the areola regularly jientagonal, quite pointed toward ajiex, 

 the Ijasal area triangular (160) Phyzelm Forster. 



28. Anterior margin of clypeus ?(o/ emarginate; metathoracic spiracles surrounded 



l)y sharp curved carinje (161) Baclivi Forster. 



Anterior margin of clypeus more or less emarginate. 



Metanotal carina angular; radius originating from the middle of the stigma; 

 first abdominal segment with strong dorsal carina\ 



(162) iVunec/u'.s Forster. 

 Metanotal carina curved; radius originating behind the middle of the 

 stigma; first abdominal segment tnlJtout dorsal carina;; upper 

 tooth of mandil)les inore than twice as long as tlie lower. 



(163) DcmopJuies Forster. 



Tribe III. HEMITELINI. 



1868. Ili'miteloidiv, Family 24, Fokstek, Verb. d. naturli. Vcr. pr. Rheinl., XXV, 



pp. 144 and 173. 

 1873. HemiteUna, Tribus, Thomson, (part) Opus. Ent., V, j). 468. 

 1884. Opus P]nt., X, p. 967. 



1894. Jlcmilelmi, Tribe II, Ashmead, Proc. Ent. Soc. Wash., Ill, ]>. 278. 

 1900. Hemitelin'i, Tribe III, Ash.mead, Smith's Insects of New Jersey, p. 569. 



Thomson (sec above) included with this tri])e Forster's Pesoma- 

 cli(>l<la\ but so far I have been a))lc to separate the tAvo readily l)y 

 the characters made use of in my table of tribes, the female l)einj^ 

 distinguished b}' metathoracic characters and the wino-^d maU\s by 

 the difference in the shape of the ])asal nervure in the front winos. 



Forster gave no character to separate the winged mal(>s in this grouj) 

 from those in the Pezomachini^ and 1 suspect he may have included 



