14 



NATURAL HISTORY BULLETIN 



I am acquainted, but goes well into the genus by the general 

 facies and by the structure of the underside. In North America, 

 Colastus is represented today by a few species which, in the 

 aggregate, range from the Atlantic to the Pacific. 



Cychramites n. gen. 



Form similar to Cychramus {€. adustus). The scutellum is smaller and 

 the last dorsal segment of the abdomen is differently formed. The type is 

 C. liirtus, described below. 



C. HiRTUS n. sp. (Plate I, Fig. 4.) Form sub-elliptical. Head large, 

 finely punctate. Prothoracic width equal to three times the length of the 

 median line, pronotum broadest across the base, strongly narrowing ante- 

 riorly, sides regularly arcuate, apex emarginate, front angles acute, surface 

 a little more distinctly punctate than the head and with a covering of fine 

 hairs. Elytra at base as wide as the prothorax, their apices separately 

 broadly rounded and finely margined. Surface not striate but with a fine 

 punctuation and covered with hairs. Apex of abdomen exposed, the dorsum 

 of the terminal segment closely, evenly, but not very coarsely nor deeply 

 punctured. Legs wanting. Length, 3.25 mm. Greatest width, 2.10 mm. 



This seems to be a Nitidulid, similar to the recent species of 

 Cychramus, but I do not like definitely to refer it there, and have 

 consequently followed the prevalent custom* of founding a maga- 

 zine genus for its reception. The form of the terminal dorsal 

 abdominal segment may be seen by reference to the figure. 



CoRTiCARiA Marsh. 



C. PETREFACTA n. sp. (Plate V, Fig. 3.) Form only moderately elongate. 

 Head narrower than the prothorax, distinctly, and relatively rather coarse- 

 ly, moderately densely punctured. Prothorax punctured a little less coarsely 

 and more sparsely than the head, about one and four-fifths times as broad 

 as long, apex narrower than the base, the sides feebly arcuate. Elytra 

 broadest a little behind the middle, apices pointed, the sculpture consisting 

 of a fine, rather irregular punctuation without sign of strial arrangement. 

 Antennje and legs wanting. Length, from front of head to elytral tip, 

 3.30 mm. 



This may not be a true Corticaria, though the form of the body 

 and the type of sculpture point to that reference. It is above the 

 average size of existing species of the genus, approaching most 

 nearly to the common C. pnhescens of Europe and America, 

 which reaches a length of 3.00 mm. 



