MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. 447 



Antenn.ne inserted on a frontal prominence; in ? 14-jointed, gradu- 

 ally incrassated, mouiliform, with long, bristly hairs; the scape is long^ 

 clavate, the firct flagellar joint twice as long as the pedicel and one- 

 third longer than the second, both narrowed toward base, the follow- 

 ing joints ronnd-moniliform, gradually increasing in size. 



Maxillary palpi very short. 



Mandibles small, bitid. 



Thorax ovoid, rounded before, the prothorax not at all visible fron, 

 above, the sides bare, flat; mesonotum flat, smooth, Avithont furrows; 

 scutellum subconvex, with a slight median ridge, separated from the 

 mesonotum by a transverse furrow all across the base ; metathorax not 

 very short, sloping oft' posteriorly, the angles not at all prominent; a 

 carint originates just back of the scutellum, forks and extends obliquely 

 on each side to the base of the hind coxjb. 



Front wings very large and broad, with long pubescei^ce ; the submar- 

 ginal vein reaches the costa before one third the length of the wing, 

 ending in a small triangular marginal vein; basal cells two, subequal. 



Abdomen short, oval; the petiole scarcely longer than thick, sepa- 

 rated from the second abdominal segment by a strong constriction, 

 dilated beneath, and in structure very similar to the nodes in certain 

 ants. 



Legs long, pilose, the femora clavate, the tibiie very long, subclavate, 

 the posterior tarsi thick, somewhat dilated, the basal joint twice as long 

 as the second, the three following joints subequal, the last longer than 

 the second, all very hairy. 



By far the most remarkable Diapriid yet discovered, and exhibiting 

 a most remarkable resend)lance to certain ants. In venation, the 14- 

 jointed clavate-moniliform antenna', and in its metathoracic and ab- 

 dominal characters, it is quite distinct from all other genera in the group, 

 and requires no special commeut at my hands, as it could not be con- 

 founded with any other genus. 



Myrmecopria mellea Ashui. 



(PI. xvm, Fig. 8, 9.) 



Loxotropa mellea Ashni., Can. Ent., xix, p. 196. 



$. Length, 2.3""". Honey-yellow, polished, sparsely pilose; eyes 

 and tip of abdomen brown. Antennie 14 jointed, reaching to the middle 

 of the al)domen ; scape long, clavate, the length of the first three joints of 

 flagelluni united; pedicel half the length of the first flagellar joint, the 

 joints beyond the second, moniliform, subpedicellate, gradually increas- 

 ing in size. Thorax flat above, without grooves, narrowed before; the 

 prothorax not visible from above; sides flat, but not impressed, bare. 

 Wings very large, broad, and hairy; the submarginal vein attains the 

 costa before one-third the length of the wing; marginal vein short, with 



