428 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. ' 



Diapria ciliata Say. 



Ptilua eiliatns Say, Lee. Ed. Say's Works, i, p. 333. 

 Gahsu8 tiliatus Aslun., Can. f^iit., xix, p. 195. 

 Diapria ciHaia Cr., Syu. Hym.. p. 251. 



Black ; feet whitish ; hairs of the wings elongated. 



Inhahits Indiana. 



Body hlaek, polished; antenna' with an olilong acute club, at base honey-yellow; 

 petiole of the abdomen and fcot honey-yellow ; winj^s deei)ly ciliated, tlio 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 the family Mymaridce. 



Diapria apicalis Say. 



P8ilu8 apicalis Say., Boat. Jour., i, p. 283 ; Lee. Ed. Say's Works, ii, p. 729. 

 Aneurhynchiis apicalis Ashm., Can. P^nt., xix, p. 195. 

 Diapria optca/is Cres., Syn. Hym., p. 251. 



AntenniB at the tip of the head, which is a little ])rominent. 



Inhabits Indiana. 



Body black, polished; antenn.'c as long as the body, fuscous, with subqaadrately 

 nionilifonn joints ; basal joint honey-yellow ; terminal joint not nnich longer than the 

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

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

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



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



CERATOPRIA Ashni., gen. nov. 

 (Type C. loufficepa Ashm.) 



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

 marghied, the cheeks with a tuft of wool behind; ocelli 3, very small; 

 eyes rounded. 



Antenna} inserted on a frontal ledge, in 9 12-jointcd, terminating in 

 an abrupt 3-jointed club, the pedicel much longer than the first funiclar 

 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 secon<l stouter, the joints beyond, except 

 the last, submoniliform, bristly. 



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

 bristles. _ - - „--..-. .. ^ , , ^t , ^ ^ 



Mandibles short bifid. 



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

 without furrows, scutellum most frecpiently bifoveated at base, with 

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

 nated above, the angles usually acute. 



Front wings pubescent, the submarginal vein ending in a small 

 punctiform marginal vein at about oue-third the length of the wing; 

 no basal uervure. 



