370 



REVISION OF THE TENEBRIONID.dE OF AMERICA, 



Thorax one-third broader than long, moderately eonvex, coarsely but sparsely punctured, anteriorly emavgmate, an- 

 gles not prominent, base broadly sinuous, sides moderately rounded, gradually narrowing toward apex, margin 

 slightly reflexed. Elytra elongate oval, parallel, sub-depressed; with eight entire and a short scutellar stria; strise 

 punctured; interstices flat, very feebly and rather sparsely punctured. Beneath ferruginous lirown, sparsely but 

 coarsely punctured. 



Length .28-.80 inch. 



The upper surface is piceous black and shining, except the basal, sutural and lateral 

 margins of the elytra, the lateral and apical margins of the thorax and the epistoma, which 

 are ferruginous brown; the under surface and legs are similar in color, but paler. 



Occurs in Northern California and along the high regions of the Southern Sierras, 

 under bark in fungus. 



THAKSUS, Lee. 



Tliarsus, Lee, Class. CoL N. A., p. 288. 



For the present this genus is retained as distinct, differing however, by souk; slight 

 characters which are at present considered valid. The mentum is here trapezoidal, not 

 trilobed in front but rounded, the anterior angles are slightly infiexed and the middle flat, 

 coarsely punctured, not prominent. The last joint of the maxillary palpi is triangular, 

 not securiform. The front tibise as in Metaclisa, are similar, and the epipleurse short. The 

 hind tarsi are short, the first joint not equalling the second and third together. 



T. seditiosus, Lee., New Species, p. 122. 



Resembles a small Uloma. Tor a description the student is referred to the rather re- 

 cent description of Dr. Lcconte. 

 Length .20-.24 inch. 

 Rather abundant in the Gulf States. 



ULOMA, Gaul. 

 I'lonia, Cast., Hist. Nat. Ins. Col. II, 210. 



Easily distinguished from all our genera of the tribe, by its short epipleurse and di- 

 lated, denticulate anterior tibise. The mentum is variable, frequently trilobed in front, 

 with the lateral lobes infiexed. 



Our species are numerous. From their mode of life some species have become widely 

 diffused and almost cosmopolite. 



The following table will serve to aid in distinguishing our species : 



Lower c<\gc of anterior femora, feebly channeled along. their entire length. 

 Epistoma feebly cmarginate or truncate. 

 Last joint ol antenna; rounded at tip. 



Middle plate of mentum elongate oval ; interatrial spaces 



of elytra entirely smooth. impressa. 



