MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 447 



AutenniTB inserted on a frontal prominence; in 9 14-jointed, gradu- 

 ally incrassated, mouiliform, witli long, bristly hairs; tlie scape is long_, 

 clavate, the first tlagellar joint twice as long as the pedicel ;nid one- 

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

 ing joints ronud-moniliforin, gradually increasing in size. 



Maxillaiy i)a]pi very short. 



Mandibles small, bifid. 



Thorax ovoid, rounded before, the i^rothorax not at all visible fron. 

 above, the sides bare, flat; mesonotum flat, smooth, without furrows; 

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

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

 very short, sloping off" posteriorly, the angles not at all prominent; a 

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

 on each side to the base of the hind coxa\ 



Front wings very large and broad, with long pubescence; 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 tibi;\i 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, ail very hairy. 



By far the most remarkable Diapriid yet discovered, and exhibiting 

 a most remarkable resemblance to certain ants. In venation, the 14- 

 joiuted 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 comment at my hands, as it could not be con- 

 founded with any other genus. 



Myrmecopria mellea Asbiu. 



(PL xviii, Fig. 8, 9.) 

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



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

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

 of the abdomen ; scape long, clavate, the lengtli of the first three joints of 

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

 joints beyond the second, mouiliform, 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, Avith 



