1S73.] ^.Jl [Horn. 



culate near the tip, obtusely carinate to base, on each side two coarsely 

 punctured sulci which coalesce opposite the scrobes and continue nearly 

 to tip. Head sparsely and moderately coarsely punctured, between the 

 eyes a deep fovea. Thorax obovate, convex, sides arcuate base narrower, 

 surface very sparsely and moderately coarsely punctured over the entire 

 surface. Scutellum densely cinereo-pubescent. Elytra broadly oval, 

 very convex, humeri obliquely rounded, surface smooth, shining, with 

 rows of moderately fine punctures, the outer two rows striate, intervals 

 fiat with a single row of very minute distantly placed punctures each 

 bearing a short erect hair. Body beneath black, shining, sides of pectus 

 with a narrow cinereo-pubescent line. Legs as in the preceding. Femora 

 with a very minute acute tooth. Length .16 inch ; 4 mm. 



The sparsely punctured thorax, strongly arched elytra, deeply foveate 

 front and more sparsely pilose surface, at once distinguish this species. 



Rare in the Middle States. 



This species is not the myrmecodes Say as the Catalogus of Gemminger 

 and Harold would seem to indicate. The name given by Chevrolat being 

 preoccupied, it gives me pleasure to dedicate it to the latter author. 



O. laevicollis n. sp. 



Black, shining. Rostrum sulcateat the sides in front above the scrobes, 

 above not carinate. Front moderately prominent, between the eyes 

 narrow. Head sparsely punctured. Thorax obovate, convex, sides 

 arcuate base narrower, surface smooth shining, impunctured, or with a 

 very few punctures near the apex at the sides. Scutellum cinereo- 

 pubescent. Elytra oblong oval, moderately convex, smooth shining, with 

 rows of fine moderately distant punctures, the outer two rows slightly 

 striate, intervals flat with a single series of very distant, minute piliferous 

 punctures. Body beneath and legs as in the preceding species. Length 

 .16 inch ; 4 mm. 



By its comparatively smooth elytra, this species resembles the preceding 

 but differs greatly in the form of that part. The thorax is very smooth 

 above and very sparsely pilose. The rostrum is apparently broader (in a 

 vertical direction) and the sides at base much flatter and the scrobes 

 therefore more oblique. The front between the eyes is narrow and the 

 latter more prominent than usual, and the head therefore more convex 

 than any other species. 



One specimen Georgia and two from unknown localities. 



O. perforatus n. sp. 



Piceous, shining. Rostrum moderately stout, coarsely but irregularly 

 punctured, grooves obsolete, above subcarinate. Eyes moderately promi- 

 nent. Head coarsely and deeply but sparsely punctured and between the 

 eyes a more distinctly impressed puncture. Thorax obovate, moderately 

 convex, sides moderately arcuate and in front of base slightly sinuate, 

 surface coarsely, very deeply, evenly but not densely punctured over the 

 entire disc and sides, and with a very few short, slender, white, recumbent 



