278 Annals of the Carnegie Museum. 



C. mutilans Cas. — Several specimens were returned to me by Mr. 

 Casey, after he had finished his very excellent and painstaking mono- 

 graph of the family ; they were sifted from piles of leaves and weeds 

 on March 29, 1895. Not abundant. 



C. capillosum Lt'c. — Has not as yet been taken here at St. Vin- 

 cent's. A pair in my collection were received from Dr. Hamilton, 

 and were taken by him with other specimens in Allegheny City. 



C. longipilosum Qjs. — A scarce species here and in Cambria 

 County. Mr. H. Wenzel has taken it in New Jersey and I have also 

 a pair from Covington, Kentucky, collected by Rev. P. Marcellus 

 Rettger. 



C. lacunosum Cas. — Rare; sifted from layers of dead leaves. 



C. pallidipes Cas. — Of the pair in my collection, one specimen is 

 from Cambria County (Rettger), the other was taken at St. Vincent's. 



Scydmaenus perforatus Siliasnu. — About half a dozen specimens 

 were taken here by sifting rotten hickory logs. 



S. badius Cas. — Occurs with the last species, and also in dead 

 leaves and weeds piled up under bushes ; not very rare. 



S. turbatus Cas. — .\bout a dozen specimens were taken from a lin- 

 den stump, on June 27, 1896 ; the wood was soft and spongy through 

 decay. 



S. sp.? near puncticeps Cas. — The rather large punctures on the 

 head are sparse and distinct. My single specimen was taken from the 

 stump of a linden tree, February 17, 1897. 



S. pubicollis Cas. — Seldom found; in decaying logs and stumps. 



S. corpusculum Cas. — Not infrequently obtained, and always from 

 layers of dead leaves, and only on the Chestnut Ridge and the Alle- 

 ghany Mountains, Cambria County (Rettger). 



S. caducus Cas. — Occurs with corpusculum, but is more abundant. 



Opresus luteus Cas. — Abundant here and in the mountains, in de- 

 caying wood, throughout the spring, summer, and autumn seasons. 



Opresus atomus Cas. — Not rare but less abundant than luteus. Has 

 occurred only in the region of the Chestnut Ridge. These very 

 minute insects are separable without the least difficulty by the marks 

 mentioned in Mr. Casey's monograph ; one of them may prove to be 

 identical with Scydmaenus minimus Brcudcl. 



Delius robustulus Cas. — Another minute, and very interesting 

 species, occurring sparingly in similar situations as Opresus luteus and 

 afoiiius. 



