186 H. C. FALL. 



Tahoe), which differs from typical emarginatum in its much more 

 coarsely closely granulate prothorax. Specimens average slightly 

 larger than the typical form, ranging from 4.5-5.5 mm. in length. 



CCELOSTETHUS LeConte. 



This name was proposed by LeConte in 1862 for the Anobium 

 notatum of Say and his own A. quadrulum, the most notable char 

 acter of which, though not mentioned by LeConte, is the connate 

 ventral segments. Two years later Mulsant and Rey apparently 

 without knowledge of LeConte's work, established the subgenus 

 Dendrobium for the European species possessing this character. In 

 his paper of 1865 LeConte suppressed Ccelostethus as a synonym of 

 Anobium, and it is possibly on this account that Dendrobium still 

 stands as a subgenus in the European catalogues. 



The remarkable character mentioned above is accompanied by 

 several other peculiarities of structure or facies, which are very con- 

 stant and render the group an unusually sharply defined one and 

 well worthy of generic standing. The eyes are moderately convex 

 but rather small and distant ; mandibles acutely carinate on the 

 upper face; joints of antennal club of parallel form, together sub- 

 equal in length to all the preceding; prosternum longitudinally 

 carinate; metasternum abruptly deeply excavated to the middle, 

 thence deeply narrowly sulcate to the hind margin ; first ventral 

 segment short; second, third and fourth subequal, fifth longest and 

 more or less impressed at the middle of the apical margin. The 

 first ventral suture is distinct and anteriorly arcuate at middle; the 

 others are obliterated at middle. The punctures of the abdomen 

 are annular or lunate, the inclosed areas showing a tendeucy, espe- 

 cially toward the sides, to become more or less prominent tubercles. 

 This singular structure is present elsewhere only in the closely rela- 

 ted Trypopitys. The disk of the prothorax is not elevated, the hind 

 angles distinct, the surface strongly granulato-tuberculate. The 

 vestiture is inconspicuous as a rule and more or less perfectly recum- 

 bent. Tarsi rather short. 



Five species are known from our fauna, all occurring in the 

 northern parts of our territory, or in the mountains when found 

 farther south. They separate as follows : 



Pubescence of elytra variegated, dark brown and cinereous 1. notatus. 



Pubescence of elytra uniform in coloration 2. 



