AMERICAN COLEOPTERA. 153 



Occurs from Arizona to New Mexico, Colorado, Utah, Nevada, Oregon 

 and Vancouver, following the distribution of Melanophila miranda and 

 other species. 



C elegans Lee. — Piceous, shining, antennae and legs pale, elytra with 

 humeral spot and lateral margin paler. Head coarsely and deeply punctured, 

 less closely at the middle of the front. Thorax about one-fifth wider than long, 

 base narrower than the length, sides arcuate in front, very slightly sinuate 

 in front of the posterior angles which are distinct but not prominent, margin 

 moderate in width, scarcely reflexed, with two well marked setae, disc moderately 

 convex, median line distinctly impressed, punctures coarse and deep, sparser at 

 middle, closer at the sides. Elytra regularly oval, a little wider behind the 

 middle, apex not truncate and with very feeble trace of sinuation, surface shining 

 with moderately deep finely punctured striae, the intervals fiat with a single row 

 of punctures coarser than those of the striae. Prothorax beneath very coarsely 

 and deeply punctate. Metasternum at sides less coarsely punctured. Abdomen 

 nearly smooth. Length .40 — .46 inch ; 10 — 11.5 mm. 



Sexual characters as in cribricollis. 



This is probably one of the most easily recognizable of all the 

 species of the genus. The elytra at tip are more nearly entire than 

 any other and approach the form of some Platynus. The margin of 

 the thorax is less wide than in any of the species which precede 

 but wider than those which follow. It forms in this respect a link 

 between the two series. 



Occurs from Massachusetts to Florida and is more common in the 

 southern regions. 



C unicolor K by.— Form rather slender, piceous, legs and antennae pale. 

 Head coarsely and moderately densely punctured, nearly equally over the entire 

 surface. Thorax very little wider than long, somewhat cordate, sides arcuate 

 in front, sinuate posteriorly, the hind angles acute and somewhat prominent, 

 narrowly margined, the margin reflexed, and with one setigerous puncture, disc 

 moderately convex, the median line scarcely evident, surface coarsely, moderately 

 densely and equally punctured. Elytra oval slightly broader posteriorly, piceous, 

 moderately shining, without humeral pale space except when immature, disc with 

 finely punctured striae, the intervals nearly flat, irregularly biseriately punctured. 

 Presternum coarsely punctured, sides of metasternum and the inflexed margin 

 of the elytra less coarsely punctured. Abdomen sparsely punctured. Length 

 .34— .36 inch ; 8.5—9 mm. 



Male. — Anterior tarsi with three dilated joints, biseriately lamellate beneath. 

 Anal segment entire, bisetose each side. 



Female. — Tarsi slender. Anal segment entire, bisetose each side. 



The abdomen although sparsely is much more closely punctured than 

 in any of the preceding species. The thoracic margin is wider than 

 the following species, much less wider than those which precede and 

 not translucent. 



Occurs in Labrador, the New England States, Hudson's Bay Territory 



TUANS. AMER. ENT. SOC. X. (39) SEPTEMBER, 1882. 



