NO.1206. ICHNEUMON FLIES— ASIfMEAD. 83 



Tribe X. METOPIINI. 



1856. TryphnnUJeH nspUkypi TIoi.moken, KdiiltI. Sv(>nsk. Aka<l. Tlandl.,!, ]>]). 1^72- 



374. 

 1868. Metopioidx, Family 10, Forster, Vcrh. d. naturli. Vcr. ])r. Rlu4nl.,XXV, 



pp. 142 and 159. 

 1894. 3fetopiini, Tribe X, Ashmead, Proc. Ent. Soc. Wash., Ill, p. 277. 

 1897. Mefopiini, Tribe, D.wis (part) Trans. Am. Ent. Soc, XXIV, p. 197. 

 1900. Metopiini, Tribe X, Ashmead, Smith's Insects of New Jersey, p. 579. 



This is a peculiar and interesting group, quite distinct from all the 

 other tribes in several particulars. 



It was first separated from other Tryphonids b}' Holmgren, who 

 gave to it the name Tryplionlde^ (upidopL The tibial spurs are 1, 1, 1; 

 the al)domen is elongate, the sides parallel or nearly, the segments 

 coarsely punctate, the areolet large, lozengoidal, or diamond-shaped, 

 the sciitellum quadrangular, margined laterally, while the face is flat, 

 scutiform, with sometimes a carina on its disk. 



These characters render the group easily recognized. 



Onl}' two genera are known, one, ddtrarius Davis, being peculiar 

 to North America; the other, Meto2)lus Panzer, having a world-wide 

 distri])ution. 



TABLE OP GENERA. 



Face flat, scutiform. 



Head .^^mall, much narrower than the thorax; antenna? su])clavate; abdomen 

 fu.siform, tapering off at apex; second joint of palpi normal; transverse 

 median nervure in hind wings angularly broken above the middle. 



(6.38) CnUrar'nis Davis 



Head not small, as wide, or nearly, as the rhorax; antennje filiform; abdomen 



elongate, the sides parallel or nearly; second joint of palpi abnormally 



swollen ( 639) Metopins Panzer 



Subfamily V. OPHIOlSniS'^gi;. 



1858. Op/i/onu/a Holmgren, Of vers. Vets. -Akad. Forhl., XV, pp. 331-330. 



1887. Ophionidiv, Familia, Thomson, Opus. Ent., XI, p. 1047. 



1887. Ophioninx, Subfamily, Cresson, Syn. Hym. North America, p. 43. 



1900. (>p}i)oninx, Subfamily V, Ashmead, Smith's Insects of New Jersey, p. 580. 



Most authorities on these insects have recognized this major group 

 as distinct from other lelinrumonUhe^ and as early as 1846, August 

 Brulle called it: Deuxieme type des Ichneumonides — Les Ophion. 



BruUe, however, never properh^ defined it and had evidently very 

 hazy ideas respecting it, since he incorrecth' included in it the genus 

 Osprynehotiis Spinola, a genuine Cryptine, and two or three other 

 genera belonging elsewhere. 



Oidy typical forms appear to be readily placed, and the closest atten- 

 tion nuist ])e given to al)d()niinal, metathoracic and certain venational 

 diflerences before others can l)e placed with any degree of certainty; 

 and even then, if one is not familiar with a large number of the 



