292 - MEMOIRS OF THE CARNEGIE MUSEUM 



5. Flagellum filiform, ivifhout Ijranches 6 



Flagellum with four braoches. 



Body bare or nearly. 



Branches of flagellum long Tanaostigma Howard. 



Branches of flagellum short Tanaostigmodes Ashmead. 



Body well clothed with short, stout, scale-like white hairs Trichencyrtus Ashmead. 



6. Body well clothed with short, stout, scale-like white hairs ; wings glahrous, the stigmal vein curved, as 



long as the marginal vein and ending in a knob, the postmarginal vein absent ; scape very slender, 

 the joints of the funicle much wider than long and briefly but distinctly pedicellate. 



Eutrichosoma Ashmead. 



Subfamily II. ENcvRTiNiR. 

 1840. Encyrtides, Subfamily 4 (partim), Westwood, Intro. Mod. Class Ins. Synop., 



p. 72. 

 1856. EncyrtoidEB, Familie 5, Forster, Hym. Stud., L, p. 18. 

 1875. Encyrtina, Tribus, Thomson, Hym. Skand., IV., pp. 12 and 112. 

 1886. Encyrtin^e, Subfamily, Howard, Ent. Amer., I., p. 198. 



1897. Encyrtinse, Subfamily II., Ashmead, Proc. Ent. Soc. Washington, IV., p. 248. 

 1900. Encyrtin^e, Subfamily II., Ashmead, Proc. U. S. Nat. Mus., XXIII., p. 324. 



This subfamily was fully characterized in my paper, " On the Genera of the En- 

 cyrtinse," published in 1900. 



The four tribes into which it was divided may be recognized by the aid of the 



following table : 



TABLE OF TRIBES. 



1. Mandibles bi- or <n-dentate, or broadly truncate at apex, never acute ; tarsi always 5-jointed 2 



Mandibles dentate, acute at apex 5 



2. Mandibles at apex, bidentate or, truncate 3 



Mandibles at apex tridentate, the teeth sometimes very minute ; labrum usually conspicuous 4 



3. Mandibles not stout, or only moderately so, rather long and always bidentate at apex ; labrum free ; 



abdomen in females with the hypopygium large, lanceolate or plowshare-shaped, inclosing the ovi- 

 positor, and extending beyond the anus ; the second segment most frequently large ; antennae usually 

 inserted just above the clypeus, rarely just below the middle of the face. Tribe I. Ectromini. 



Mandibles stout, but short and polished, the apex broadly truncate, unarmed or nearly so; labrum 

 conspicuous ; abdomen with the hy2:)opygium less evidently prominent, not projecting ; body usually 

 stout, not metallic ; hind tibise with tiuo sjDurs ; antennse inserted below the middle of the face. 



Tribe II. Encyrtinse. 



4. Hind tibise with one apical spur ; hypoi^ygium not prominent ; body most frequently, but not always 



metallic ; antennse variable Tribe III. Mirini. 



5. Tarsi 4- or 5-jointed ; marginal vein punctiform, or subobsolete Tribe IV. Arrhenophagini. 



Tribe I. Ectromini. 

 In this tribe the species are usuall}^ more elongate and narrower, the marginal 

 vein proportionately longer, with tlie stigmal vein shorter, while the mandibles are 



