North American RhyncJiojihora. 263 



pubescent ; remainder coarsely and sparsely setose, shining. Scrobes 

 beginning on the sides at the apex, gradually descending in a rather 

 strong arc, and ending near the lower margin of the eye, rather deep 

 and narrow. Mentum large, flat, not deeply placed, filling the entire 

 gular cavity, wider than long, broadly rounded at apex. Genae with a 

 rather small and feeble mandibular eraargination. Mandibular scar 

 small, not prominent, strongly transverse. Prothorax with small but 

 distinct ocular lobes, which are distinctly fimbriate. Scutellum not 

 distinct. Elytra inflated. Legs rather short and robust ; anterior tibiae 

 not denticulate within ; articular surfaces very oblique, scaly, those of 

 the posterior not cavernous, the latter not mucronate at tip. Posterior 

 coxas very widely separated, at the sides of the body, small. Abdomen 

 rather short ; first suture arcuate for a short distance in the middle ; 

 second segment slightly longer than the next two together. Tarsi spinose 

 beneath, with the third joint distinctly wider than the second, bilobed ; 

 the fourth is as long as the remainder combined ; basal joint scarcely 

 longer than the second. Claws rather long, free. 



If we regard this genus as belonging to the first division of 

 Dr. Horn, its place is probably near Oimbocera, but the meso- 

 sternal side-pieces are completely divided, the episternum entirely 

 separated from the elytra by the epimeron, and the metasternal 

 episternum is produced inward slightly at the apex, which 

 characters would prompt us to place it in the second division, 

 where, however, it apparently does not belong. In form it 

 greatly resembles Trig ono scuta ]^ilo 8a, and in the latter species 

 the mesosternal side-pieces are also divided as in the second 

 division. 



M. setosus n. sp. — Form oval, rather robust, convex, densely 

 covered throughout with a thick indument, composed of very large 

 luteous closely adherent scales, which are very convex and polygonally 

 crowded on the head, prothorax, and abdomen, but fiatter and more 

 dense on the elytra ; color of body and legs black ; entire surface 

 bristling with very long, erect, pale setae, not regularly arranged on the 

 elytra. Beak slightly longer than the head, feebly attenuate, flat, 

 with a very indistinct median fovea, slightly produced in the middle at 

 apex, the lobe separated posteriorly by a posteriorly angulate suture. 

 Prothorax widest slightly before the middle ; sides strongly arcuate, 

 convergent toward base, just perceptibly constricted at the sides im- 

 mediately behind the apical margin, one-half wider than long, much 

 wider than the head, not perceptibly punctate ; base truncate ; apex 

 broadly, feebly arcuate, equal to the base. Elytra inflated, widest at 

 basal fourth ; sides thence feebly convergent and very feebly arcuate, 

 abruptly, broadly rounded behind ; posterior declivity perpendicular ; 

 humeri obsolete ; disk convex, one-half wider than the prothorax, one- 



