ART. 20. 



ICHNEUMON-FIJES OF TEIBE PANISCINI— CUSHMAN. 7 



Subfamily Tryphoninae. 



Tribe MESOLEPTINI. 



Subtribe Mesoleiina. 

 In the Mesoleiina Oplehes conies closest to Prolarchvs Toerster. 

 In OpMtes most of the features characteristic of Protorcte are exag- 

 terafed especially the glymmae of the first tergite, and the genus 

 has many features peculiar to itself. But I bd eve there can be no 

 doubt of Hs close relationship to Protarchus. Of mdub.table sign fi- 

 cance in this connection is the fact that the two genera are parasitic 

 Trelated tenthredinid genera, OpkHtes on Cimie. -/ P^'-f - - 

 TricMosoma. Furthermore, the new genus HypofMtcs, descnbed 

 below, combines many of the characters of the two genera The fol- 

 lowing key will distinguish these three genera as well as the recently 

 described Pro(arofio;<J« Cushman and two other new genera, one from 

 Japan allied to OphcUe. and one from North America allied to 



Protarchus. ^^^ ^^ certain genera of mesoleiina. 



1 rivDeus transversely impressed and arcuately emarginate at apex; frons not cari- 

 '■ '''lZ''J.:ZTlIteJy, at most -btuberculate just above_ antenna^; second 



recurrent curved with an outwardly convex curve near the top, its buUa 



divided ; abdomen not compressed ; - ■ ; .• " ' ' ' ■,"'_■ 



Clypeus n^t impressed, its apex broadly rounded; frons cannate or ndged later- 

 aUv second recurrent straight, its bulla not divided; abdomen compressed . 4^ 



2 Frons'deepW concave with\ low tubercle on either side just above level of 

 ^- 'r^nLVnotauli deeply impressed anteriorly and reach^^^^^^^^^^ o^^meso- 



FronsTailowiy'conca;;'and without tubercles; notauli obsolete or short 3 



3. Hind tibiae and tarsi, especially the tars, compressed; ^^^^^^^^^'^'^Zl] 



ffind tibiae and tarsi not' compressed ;'clypeu8 with a small acute tooth medially 

 at junction of basal and apical areas (see fig. 4) ; areolet^absent^^^^^ ^^^ ^^^^^_ 



4. Glymmae not confluent, the petiole not especially compressed; dorsal ^Jjrface of 



propodeum much shorter than posterior, the median cannae rather weak, areola 



qua^drate, broad and short; claws simple Hypopheltes new genus^ 



Glymmae confluent the petiole strongly compressed; dorsal surface o^ P;;«P;de^^ 

 longer than the posterior, elevated medially near base, he °^f ^^°;™« 

 high, areola narrow, most frequently incomplete laterally, when completes 



elongate triangular, claws pectinate '":' '1 u^'' ' wiVhn„t 



5 First tergite with dorso-lateral carinae distinct only at ^^^f °^^ b^/;',,^''", 

 median furrow; propodeal spiracles long oval; areola incomplete laterally basa 

 joint of flagellum nearly or quite twice as long as second; diameter of lateral 

 ocellus longer than ocell-ocular line; eyes distinctly divergent below, inner 

 orbits strongly carinately ridged; rufous, with head, thorax and ^Momen b ack 

 marked, antennae largely red; wings sometimes dark at ^P?^ but without a 



well defined maculation Opheltes Holmgren 



First tergite with dorso-lateral carinae distinct to spiracles and with a distinct 

 median furrow from near base to near apex; propodeal spiracles broad oval, 

 areola complete, triangular; basal joint of flagellum barely a half longer than 

 second; diameter of lateral ocellus shorter than ocell-ocular line; eyes scarcely 

 divergent below; inner orbits weakly ridged; ferruginous with only flagellum 

 and apex of abdomen black; wings with well defined apical cloud. 



^ Nephopheltes, new genus. 



