22 GEO. H. HORN, M. D. 



mer, but is finer. The median basal depression is smaller than either 

 of those and the median line is not deeply impressed. The punctua- 

 tion of the abdomen is much finer and its pubescence denser, so 

 that in certain lights it obscures the punctuation. I have no doubt 

 but that this species is mixed in most collections with striatus as a 

 smoother variety. 



I have named this species in comj^liment to Mr. W. H. Harring- 

 ton, of Ottawa, to whom I am indebted for the kind loan of mate- 

 rial on several occasions. 



Occurs in New York and Canada. 



D. cyliiidrioolli^ Say. — Form elongate, moderately convex, slightly nar- 

 rower posteriorly, black, shining, sparsely clothed with very inconspicuous yel- 

 lowish hair ; antennse not extending beyond the hind angles of the thorax, 

 piceous, subserrate, second joint longer than the fourth, third as long as the 

 next two, joints four to ten longer than wide and gradually longer, eleventh 

 one-half longer than the tenth ; head convex, coarsely and densely punctured, 

 interocular carina broadly interrupted at middle ; clypeus at base half as broad 

 as at apex, but not more than half the distance to the eyes ; thorax longer than 

 wide, sides straight and parallel posteriorly, obliquely convergent at apical third, 

 disc moderately convex, a median depression at base, the median line very deeply 

 impressed one-third from the base to the front, surface not very densely punc- 

 tured at middle, more densely at the sides, but scarcely rugose ; elytra with the 

 sutural stria extending two-thirds from apex to base, the surface otherwise mod- 

 erately coarsely but not very densely punctured and not rugose ; prosternum 

 rather finely not closely punctured, the triangle more coarsely and closely, the 

 outer side twice as long as the base, the autennal groove narrow, deep and 

 sharply limited ; mesopleurse obsoletely punctate ; metasternum and abdomen 

 coarsely and rather densely punctured ; legs piceous. Length .28 - .34 inch ; 

 7-8.5 mm. 



This species is readily known by the entire obliteration of the 

 elytral striae except the sutural. 

 Occurs from Canada to Georgia. 



D, IVIar^eiili Bonv. — Form .subcyliudrical, slightly narrower posteriorly, 

 bright reddish brown, moderately densely clothed with short yellowish pubes- 

 cence ; antenna^ not as long as half the body, filiform, second joint equal to the 

 fourth, third as long as the next two, joints 5- 10 at least twice as long as wide, 

 gradually longer, eleventh longer than the tenth and slender; head convex, 

 moderately densely and slightly rugosely punctate, interocular carina broadly 

 interrupted at middle ; clypeus very narrow at base, not more than a fourth of 

 the apex and scarcely a half the distance to the eyes ; thorax as long as wide, 

 sides posteriorly straight and parallel, anteriorly arcuate and narrowed to the 

 front, on each side of the middle of base a small fossa, median line not impressed, 

 surface rather slightly punctate, denser and subrugose at the sides ; elytra finely 

 striate, the intervals finely not densely punctate, slightly rugose on the sides ; 

 body beneath a little darker than above, finely and densely punctate, more 



