238 COLEOPTERA OF NORTH AMERICA. 



of the Cucujidae ; Hypophlceus is slender and cylindrical ; Euto- 

 chia (Aniara\\ I>ej.) resembles in appearance Ulonia, though 

 stouter and more convex, and has, on the under surface of the 

 prothorax, the peculiar rugous sculpture seen in Helops. 

 Pygidium not covered by the elytra ; antennae thick, perfoliate, epipleurse 



not extending to the tip of the elytra. Hypophlcsus. 



Pygidium covered by the elytra ; antennae slender ; 

 Outer joints of antennae gradually larger ; 

 Tibial spurs obsolete ; epipleurae entire. Prateus. 



Tibial spurs distinct ; 



Epipleurae not extending to the tip of the elytra. Adelina. 



Epipleurae entire. Eutochia. 



Last two joints of antennae suddenly larger ; epipleurse entire. Dia?Dns. 



Adelina is represented by one species, A. pallida Lee. (Pytho 

 •pallida Say), from the Atlantic district, and another, A. plana 

 Lee, from the Colorado Desert. The latter species is remark- 

 able for the sides of the front of the male being dilated into an 

 acute angle, under which is seen a short acute horizontal horn. 

 The other genera are represented only in the Atlantic States. 



In Eutochia picea Lee. (Aniara picea Mels.), the anterior 

 tarsi of the male are dilated, and the anterior tibiae are curved 

 inwards. 



The type of Prateus is a small brownish insect, P. fusculus 

 Lee, of elongate form (13 unc. long), coarsely but not densely 

 punctured ; the thorax is not wider than long, somewhat rounded, 

 and finely margined on the sides, moderately convex, not nar- 

 rower at tip than at base ; the elytra are two and a-half times 

 longer than the thorax, and without stria? ; the epipleurse extend 

 to the tip of the elytra. It is found in the Middle and Southern 

 States. The only species of Dioedus known to me is a small 

 (10- - 13 unc. long) oblong, reddish-brown, shining insect, with 

 strongly punctured thorax, and deep punctured elytral striae, 

 found in the Atlantic States under pine bark. It resembles the 

 European genus Phthora ; but has only the last two instead of 

 three joints of the antennae large ; the anterior tibiae are slightly 

 dilated and finely toothed. I have named the species Dioedus 

 punctatus; it resembles in appearance a miniature Uloma. 



Tribe XIV.— HELOPINI. 



Body generally oblong, sometimes oval, apterous or winged ; 

 head received in the thorax nearly as far as the eyes, which are 



i 



