NO. 1206. ICHNEUMON FLIES— ASHMEA D. 127 



SuT^raiTiily X. ^VGr^THIDIN^K. 



1885. Agathides Marshall, Trans. Ent. Soc. Lond., p. 10. 



1887. Agcdhinx, Subfamily Cresson, Syn. Hym. Nortli America, pp. 54 and 59. 



1888. Agaihididic, Tribe XII, Marshall, Species des Ilym. des Braoonides, I, 

 p. 66. 



1900. Agathidimr, Subfamily X, Ashmead, Smith's Insects of New Jersey, 

 p. 592. 



This subfamil}^ represents quite ti distinct group, but with affinities 

 allying it to the Cardioclxilhuti and the Mlct'ogaHterinm^ the three eA'i- 

 dcntly having had a common origin. 



The short, very narrow, pointed marginal cell is characteristic of 

 the group, and this character, with the others given in my table of 

 subfamilies, renders the group easily recognized. 



Forster made of the group two distinct families, Agatlddoidai and 

 Ewnicrodoidw^ based merel}^ upon a difference in the shape of the 

 head. 



I ])elieve, with Mr. Marshall, that both groups are too closely allied 

 to warrant such a separation; but since both groups ma}' be easih^ 

 separated by the chai'acter used by Forster, their "paration is main- 

 tained as a matter of convenience, in the sense of tribes. 



The groups are thus distinguished: 



table of tribes. 



Head rostriform, tlie malar space, or the space between the eyes and the mandibles, 

 very long Tribe I. Agathidini. 



Head normal, not rostriform, the malar space never very long, sometimes entirely 

 wanting, the eyes extending to base of mandibles Tribe II. Microdini. 



Tribe I. AGATHIDINI. 



1862. Agatlikloidiv, Family II, Fokstek, \'erh. d. Naturh. Ver. i)r. Rheinl., XIX, 



pp. 228 and 245. 

 1900. Agathidini, Tribe I, Ashmead, Smith's Insects of New Jersey, p. 592. 



The shape of the head alone must be depended upon to distinguish 

 this tribe. 



Six genera fall into this minor group, separable as follows: 



table of tiENEKA. 



A reolet present, never wliolly wanting, triangular or quadrate 2 



A reolet wholly wanting (980) Braunsia Kriechbaumer. 



2. Areolet triangular, often petiolate 5 



Areolet quadrate, the outer nervure, or the second transverse cubitus, most fre- 

 (juently broken by a stump of a vein 3 



3. Frontal excavation large, with a sharp edge on each side, not separated at the 



middle; between the antenn;e at the base are two stout knobs. 



Lateral edges of the frontal cavity not continued to the lateral ocelli; ovi- 

 positor long 4 



Lateral edges of the frontal cavity extending to the lateral ocelli; ovipositor 

 not very prominent 1 (981 ) Disophrys Forster. 



