18 GEO. H. HORN, M. D. 



7. — Elytra deeplj' striate, surface roughly sculptured, the punctuatiou of the 

 abdomen coarse, the pubescence inconspicuous J^ti'iaf US. 



Elytra faintly striate, punctuation not rough, the abdomen rather densely 

 and finely punctured, the pubescence conspicuous Harriiigtoiii. 



Elytra without strife, punctuation not rough, the abdomen coarsely punc- 

 tured, pubescence very sjjarse cyliudricollis. 



8. — Color bi-own, antenuse shorter than half the body, propleural triangle 

 twice as long as wide; elytra finely striate IVIar»$ouli. 



Color piceous, antennae half as long as the body, propleural triangle not 

 twice as long as wide; elytra not striate piii^illiis. 



D. califoruicus Bonv. — Form oblong, moderately robust, color nearly 

 black, subopacxue, sparsely clothed with short brownish pubescence; antennae 

 not extending beyond the hind angles of the thorax, filiform and rather com- 

 pact, second joint distinctly longer than the fourth, third as long as the next 

 two, fourth and fifth very little longer than wide, 6-11 gradually longer ; head 

 convex, the punctuation dense, slightly rugose, but not very coarse, the inter- 

 ocular carina extending distinctly across the base of the clypeus ; clypeus nar- 

 rower at base than half the apex and equal to half the distance to the eyes ; 

 thorax as long as wide, the sides posteriorly parallel, or feebly arcuate, anteriorly 

 arcuately narrowed to the front, disc convex, a very feebly impressed median 

 line almost obsolete in front, surface coarsely, densely and subrugosely punctured ; 

 elytra distinctly striate, the intervals feebly convex, densely subrugosely punc- 

 tured, but less coarsely than the thorax ; prosternum coarsely, but sparsely punc- 

 tate, the sutures straight, open in front, the triangle one and a half times as long 

 on the outer side as wide at base ; antennal grooves deep, sharply limited ; metas- 

 ternum and abdomen coarsely and moderately densely punctured, last ventral 

 segment not prolonged in a point ; legs brownish ; tarsal claws simple. Length 

 .36 - .40 inch ; 9 - 10 mm. 



This species ha.s the most robust faeies of any in our fauna and 

 may be at once known by its subopaque bhick color and the entire 

 interocular carina. By the table given by Bonvouloir it is plainly 

 related to ischiodontoides, from which it differs in color and form of 

 its thorax. In comparing the above description with that by Bonvou- 

 loir sevei'al unimportant differences will be observed. The type is 

 in my cabinet. 



Two specimens, California. 



D. sejuuetiis Bonv. — Form straight, slightly attenuate posteriorly, reddish 

 brown, clothed with short yellowish pubescence ; antennse slender, ferruginous, 

 not as long as half the body, second joint shorter than the fourth, third distinctly 

 longer than the fourth, joints 5 - 10 longer than wide, gradually longer, the elev- 

 enth one-half longer than the tenth ; head convex, punctuation fine, rather dense, 

 scarcely rugose, interocular carina broadly interrupted at middle ; clypeus at base 

 half as wide as the apex ; thorax a little wider than long, sides posteriorly straight 

 and parallel, anteriorly feebly arcuate, disc convex, a small fossa on each side of 

 the middle of base, a feeble median line near the base which beconies obliterated, 

 and is again evident in front without, however, reaching the middle, the i)unctua- 

 tion not coarse nor very den.se, slightly rugose near the sides ; elytra finely striate, 



