266 Annals of the Carnegie Museum. 



There are here given three hundred and eighty-eight species and 

 twenty-six varieties. Of these, three hundred and sixty are deter- 

 mined, and twenty-eight are undetermined. The total number of 

 species of beetles found up to this time in southwestern Pennsylvania 

 is over twenty- five hundred. 



As far as possible I have adopted the genera of Henshaw's Cata- 

 logue, except in the case of the families Scydmtenidae and Pselaphidae. 

 As these families have been completely revised, and many new genera 

 created, the change of generic names has been considered necessary. 

 No new family of Coleoptera is added to our fauna by this list except 

 the Stylopida^. 



I am especially indebted to Rev. J. Schmitt of St. Vincent's Col- 

 lege for permission to incorporate his list and notes on the Scydmse- 

 nidte and Pselaphidse, which will be appreciated by coleopterists 

 everywhere. To the Director of the Carnegie Museum, Dr. W. J. 

 Holland, I tender my thanks for his courtesy in aiding me in many 

 ways, and also to the coleopterists of Pittsburgh and vicinity, for the 

 privilege of examining their collections. 



i^ Denotes species listed in manuscript by Dr. John Hamilton since 

 the publication of his list. 



* Denotes species collected near St. Vincent's by Rev. Jerome 

 Schmitt and his assistants. 



Species collected by others, I note in my remarks on the species. 



Note. - Dr. John Hamilton by his last will and testament be(|ueathed his collec- 

 tion of Coleoptera, together with his library relating to Coleoptera, ancl his manu- 

 scripts, to Dr. \V. y. Holland, in trust, to be by the latter placed in such insti- 

 tution as might appear to be the most suitable and best repository for the same, 

 expressing a preference to have the collection placed in a museum connected with the 

 Carnegie Library in Pittsburgh, should such a museum be established, and proper 

 provision made therein for the jn-eservation of scientific collections. Dr. Holland 

 after Dr. Hamilton's death turned over the collection and the books and manuscripts 

 to the Trustees of the Carnegie Institute. It is by the special permission of Dr. 1 lolland 

 that I am able to incorporate in this supplementary list the names of those species 

 which Dr. Hamilton recorded in his manuscripts as having been found by him since 

 his list went through the press. I desire to express with deep gratitude my indebted- 

 ness to Dr. Hamilton for the assistance and encouragement I received from him dur- 

 ing his life-time. I owe to him the fact that I am able to " contribute my mite " to 

 the science of entomology. When sixteen years ago I began to form a collection, he 

 aided me by giving me most valuable hints and suggestions, and from year to year de- 

 termined my specimens for me. In his death entomology has lost one of its most 

 valued students, and beginners one of their most patient helpers. 



