284 Annals ok the Carne(;ie Museum. 



R. sodalis Cas. — Less abundant than ruhicunda, and in similar sit- 

 uations. 



Bythinus tychoides Brcnd. — One example taken on the Chestnut 

 Ridge. 



B. carinatus BrciuL — Abundant under leaves in the mountains at 

 St. \'incent's and in Cambria County (Rettger). 



Tychus minor Lcc. — Rare and local. 



T. verticalis Cas. — Rare and local. The male of this species has a 

 T-shaped tubercle at the middle of the metasternum, which is lacking 

 in T. minor. 



Pselaphus erichsoni Lee — The only western Pennsylvania specimen 

 of this genus that I have .seen is in the collection of H. G. Klages. 

 It was taken at Jeannette by Mr. F. Knechtel. 



Sognorus (Ctenistes) piceus Lee. and S. consobrinus. — In reference 

 to these two s[)ecies I have no remarks to add to those already made 

 in the Hamilton List. My observations on the form of the palpi of 

 C. Ziinvierinanni are positively correct. 



Ceophyllus monilis Z^r. — Not rare in the colonies oiLasius aphidi- 

 cola and L. claviger. The ants seem to take no notice of the beetles. 



Tmesiphorus COStalis L.ee. — Dr. Hamilton has recorded the capture 

 of two specimens near Allegheny City ; I have not seen these, or any 

 others, from Pennsylvania. At Belmont, N. C, I have taken pairs of 

 it in April, always under the bark of pine stumps. 



T. carinatus Say. — A single specimen has occurred here under the 

 bark of a dead hickory in spring. 



Cedius ziegleri L.ee. — Since Dr. Hamilton's record I have taken a 

 pair in a nest of Cainponotiis pennsylvanietis, but have seen no others. 



C. spinosus Lee. — A colony of thirty specimens was found in a lin- 

 den log on February 17, 1897. It is generally scarce. 



Tyrus humeralis Aube. — Like Cedius, this is not often obtained. It 

 is very probable that the specimens in my collection will prove to 

 represent more than one species, when studied critically. I have it 

 from St. Vincent's, and from Elk and Cambria Counties (Rettger). 



Cercocerus batrisoides Lee. — About a dozen specimens have been 

 taken in a decaying log near Carrolltown, Cambria County, by Rev. 

 Mr. Rettger, during the autumn of 1896. Dr. Schaufuss has rede- 

 scribed this genus under the name of Upoliiua, his U. erassieoniis 

 coming from Upoluna, one of the Samoan Islands. 



Adranes lecontei Jh-eud. — Frequent and careful search has failed 



