1873.] -ADD [Horn. 



convex but the difference is not sufficient to be noticed readily, and the 

 intervals being thus equal tbe short carina at the humerus disappears. 

 Pennsylvania, Illionis, Kansas. 



It. pubeseens, n. sp. 



Oval, moderately robust, brownish ferruginous, feebly shining, sparsely 

 clothed with yellowish hairs over the entire surface. Rostrum rather 

 slender, sparsely punctured, at sides punctato-sulcate, above not carinate. 

 Head coarsely and very densely punctured. Thorax nearly twice as wide 

 at base as long, sides arcuate, apex moderately constricted, base feebly 

 arcuate, surface moderately convex, median line not carinate, with 

 oblique strigse closely placed and a few punctures along the apical and 

 basal margins. Scutellum sparsely pubescent. Elytra feebly narrower 

 to the tip, surface with rows of coarse, deep, nearly round punctures not 

 closely placed, intervals alternately carinate, tbe flat intervals densely 

 punctulate. Body beneath colored as above, coarsely punctured, abdomen 

 more finely and densely, sparsely pubescent. Legs concolorous. Length 

 .'22 inch ; 5.5 mm. 



This species agrees with the first two in having the intervals alternately 

 cariniform and a short humeral carina, but differs from all our species in 

 the color and the pubescent surface. 



Two specimens, Owen's Valley, California. 



Chalcodermus Schonh. 



This genus is so closely allied to Rhyssomatus that it becomes a matter 

 of difficulty to separate them when the foreign species are considered. 

 Lacordaire relies on the character afforded by the hind tibia in which 

 the tip or truucature is entirely open in Bhyssomatus and closed by a 

 ridge in the present genus.* Our species are few in number and are the 

 more readily known by their more slender rostrum and the absence of 

 any tooth near the apex of the tibias on the outer edge. 



Our species are as follows : 



Elytra striate, intervals elevated. 



Surface ferruginous (with aeneous tinge) pruinosus. 



Elytra not striate but with rows of coarse punctures. 



Thorax suddenly narrowed in front, coarsely punc- 

 tured aeneus. 



Thorax deeply longitudinally strigose ; body brown 



elytra paler collaris, 



Thorax irregularly strigose ; body black inaequicollis. 



* For a fuller account of this character see Genera des Coleopteres, Vol. 6, p. 11. The trun- 

 catures of the hind tibise Lacordaire designates as ' 'corbeilles, ' ' a technical word having no 

 equivalent in our language, and the difference meant by "cordeilles caverneuses" and 

 ' 'd 'couvert^s" are there fully exposed. 



A. P. S. — VOL. XIII. 3G 



