428 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Diapria ciliata Say. 



Psilus ciliatus Say, Lee. Ed. Say's Works, i, p. 333. 

 Gah'siis cilialits Asbni., Can. Eiit., xix, p. 195. 

 JHupria ciliata Cr., Syn. Hyin., p. 251. 



Black; feet whitish; liaiis of the wings elongated. 



Inhabits Indiana. 



Body black, polished; antenna' with an oblong acute club, at base honey-yellow; 

 petiole of the abdomen and feet honey-yellow ; wings deeply ciliated, the hairs longer 

 than the transverse diameter of the wings. 



Length less than one-twentieth of an inch. (Say.) 



This appears to me to be a Cosmocoma in tlie family Mymaridce. 

 Diapria apicalis Say. 



JPsilns apicalis Say., Bost. Jour., i, p. 283 ; Lee. Ed. Say's Works, ii, p. 729. 

 Aneurliiinchtts apicalis Ashm., Can. Ent., xix, p. 195. 

 Diapria apicalis Cres., Syu. Hym., p. 251. 



Antenuic at the tip of the head, which is a little prominent. 



Inhabits Indiana. 



Body black, polished; antenna? as long as the body, fuscous, with subquadrately 

 monilifonn joints ; basal joint honey-yellow ; terminal joint not much longer than the 

 preceding one ; inserted at the tip of the head ; beneath the antennte is rather a broad 

 prominence ; costal nervure but little less than half the length of the wing, triangular 

 and black at its tip; feet honey-yellow ; petiole distinct. 



Length one-twenty-fifth of an inch. (Say.) 



CERATOPRIA Ashm., gen. nov, 

 (Tyi^e C. lomiiccpe Ashm.) 



Head globose or oblong, Avitli a frontal impression, the occiput faintly 

 margined, the cheeks with a tnft of wool behind; ocelli 3, very small; 

 eyes rounded. 



Anteunse inserted on-a frontal ledge, in 9 12-jointed, terminating in 

 an abrupt S-jointed club, the pedicel much longer than the first fiiniclar 

 joint, the first funiclar joint only a little longer than thick; in $ 

 14-jointed, filiform, the pedicel small, rounded, the first funiclar joint 

 shorter than the second, the second stouter, the joints beyond, except 

 the last, submoniliform, bristly. 



Maxillary palpi 4-joiDted, stout, the last joint terminating in 2 long 

 bristles. 



Mandibles short bifid. 



Thorax ovoid, the collar usually woolly, the mesonotum smooth, 

 without furrows, scutellum most frccpiently bifoveated at base, with 

 lateral grooved lines; metathorax short, woolly, emarginated, bicari- 

 nated above, the angles usually acute. 



Front wings pubescent, the submnrginal vein ending in a small 

 punctiform marginal vein at about one-thud the length of the wing; 

 no basal nervure. 



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