236 J. L. LECONTE, M. D. 



Alaska, British Columbia, Kansas, Illinois, Pennsylvania. The epis- 

 touia of the % is more deeply concave than that of the 9 , and the 

 head is more dilated behind the eyes. 



7. O. convergens, n. sp. — Depressed, piceous, shininp;, base of antennae 

 and legs testaceous; elytra darker testaceous, coarsely aciculately punctured. 

 Head prolonged behind the eyes, which are small and convex; surface coarsely 

 punctured, posterior impressions moderately long, converging obliquelj- for- 

 wards to the front, which has a short longitudinal line; epistoma deeply con- 

 cave, smooth at the bottom, strongly margined. Prothorax strongly punctured; 

 the three dorsal grooves are deep and entire, the lateral impressions broad as 

 usual. Dorsal and ventral segments finely and sparsely punctulate. Length 

 3.4 mm ; .1.3 inch. 



'^. — Head as wide as the prothorax, sides parallel behind the e3'es, then sud- 

 denly rounded and constricted. Seventh ventral with a broad flat trapezoidal 

 medial lobe, which is truncate at tip, and nearly as long as the eighth segment. 



5. — Not seen. 



One specimen, Sandy Point, Florida. Messrs. Hubbard and 

 Schwarz. 



8. O. insignitns, Grav. Mon. 188; Er. Staph. 793; 0. americanus, Mann. 

 Brachelytra, 48. — %. Head large, quadrate, nearly smooth, strigose each side 

 behind the eyes; epistoma prolonged at the middle and acuminate; mandi- 

 bles very long, slender, falcate; seventh ventral segment feebly bisinuate 

 at tip. 



9. — Head not as wide as the prothorax. rounded behind the eyes, sparsely 

 punf"tured,pnnctures smaller in front, epistoma subtruncate; mandibles moder- 

 ate in length; seventh ventral broadly rounded at tip. 



Atlantic slope from New York to Florida and Kansas, abundant. 

 In this species the sexual differences are mainly in the head, and the 

 abdominal characters are consequently very feeble, as already men- 

 tioned in the prefatory remarks to this memoir. 



9. O. puiictatiis, n. sp. — Black, shining, elytra dark-brown, legs yellov/- 

 brown. Head sparsely punctured, epistoma quadrate, depressed, nearly smooth, 

 separated by a transverse impression; frontal and posterior impressions almost 

 united; vertex convex, with a short longitudinal impression; sides parallel for 

 a short distance behind the eyes, then suddenly rounded and constricted; eyes 

 convex, not very prominent. Prothorax a little wider than long, coarsely punc- 

 tured, middle groove deep, the other two less defined; side impressions large, 

 shallow. Elytra depressed, strongly rugosely punctured. Dorsal segments 

 smooth; ventral sparsely very 6nely punctulate. Length 2 mm; .08 inch. 



Vancouver's Island and British Columbia; Mr. G. R. Crotch. I 

 observe no sexual characters in fourteen specimens examined. Two of 

 them are rather larger, but do not otherwise differ. 



