AMERICAN COLEOPTERA. 131 



EUTHEIA Steph. 

 E. colon, testaceous, shining, sparsely clotlieil with subercct yellow hairs, 

 head scarcely punctured, thorax quadrate, moderately convex, sides rounded 

 in front, gradually narrowing behind, hind angles distinct, base truncate, with 

 transverse row of six large punctures. Elytra moderately convex coarsely 

 punctured, pubescent, and with two black spots at the posterior third. Length 

 .04 inch. 



One specimen from Fort Grant, Arizona. 



The elytra are of a paler colm* tlian the rest of the body, and more 

 densely pubescent. This species is abundantly distinct from that de- 

 scribed by Mannerheim from Alaska. Another species has been found 

 by 3Ir. Ulke in the Middle States. It is likewise very rare, and I 

 have had no opportunity of studying specimens or of comparing them 

 with this one. 



TRIARTHRON Mserkel. 

 T. Lecontei, elongate oval, testaceous, shining, very sparsely clothed with 

 very minute erect hairs. Head very finely and sparsely punctured. Thorax 

 transverse, twice as broad as long, convex, sparsely and finely punctured, trun- 

 cate in front, feebly rounded at base, sides feebly rounded and very faintly 

 margined, basal margin distinct and with a transverse row of coarse punctures. 

 Elytra with striae of very coarse, closely placed punctures, interstices flat, 

 faintly biseriately punctured and finely rugose. Length .12 inch, % . 



A single specimen from the high South-eastern Sierras of California. 

 I have had no opportunity of comparing it with the European species. 

 Triarthron differs from Hydnohius in having the antennal club 3- 

 jointed. 



XANTHOPYGTJS Kraatz. 

 X. cacti, black, shining. Head with vertex smooth, sides and near hind an- 

 gles coarsely punctured, thorax as broad as long, middle of disc smooth, on 

 each side a row of coarse punctures, and with coarse punctures towards the 

 margin; sides feebly, base broadly rounded, hind angles not evident, apex trun- 

 cate, angles distinct. Elytra bluish-black, coarsely and densely punctured and 

 clothed with black sub-erect hairs; abdomen black, last two segments yellow, 

 finely but sparsely aciculately punctured. Beneath black finely punctured and 

 with the legs irregularly clothed with hairs. Legs black. Length .6-4 inch. 



Fort Grant, Arizona. Under decomposing Cereus; rare. 



This genus of Staphylini is now for the first time indicated in our 

 fauna. 



The elytra of this species are rather densely hairy. The head and 

 thorax are also provided with a few hairs, arising from the large punc- 

 tures scattered irregularly over their surfaces. To what foreign spe- 

 cies it is allied, I cannot indicate. 



