INTRODUCTORY. 



For the third of tliese Special Bibliographies, I have compiled a list, supposed to le complete 

 to the end of July 1879, of the writings of Mr. Samuel H. Scudder, of Cambridge, Mass. Mr. 

 Scudder has aided me much in the preparation of this list, Mr. S. Henshaw has examined the proofs, 

 and Dr. H. A. Hagen has allowed me the facilities offered by his large entomological library. 

 I here give grateful acknowledgment to them and to others who have rendered assistance. 



The titles of the first and second of these Special Bibliographies v»^ere printed on title-slips for 

 use in library catalogs. The titles of Mr. Scudder's writings will be printed only in the accom- 

 panying form, and can be used on title-slips by cutting and pasting. 



The necessity having arisen for a distinct recognition of the kind of notice a paper has 

 received, I suggest the annexed scheme, adopted in the following pages : 



V. Adversely critical, ..... indicated by Crit. Eev. 



2^ Commendatory or doubtful, - - ' . . « « Yiev. 



f Mention of title and reference only, - " " Note.* 



I Synopsis, or description of contents, - " " Notice. 



3^. Neutral. -{ Tabulated synopsis, etc., - - . « « Abstract. 



I A portion reprinted, - . - . « « Extract. 



[ Entire reprint, .... .< « j^ppj-iut, 



4°. Advertisement, ----.. .< « Advert.* 

 * Rarely noticed in my Special Bibliographies. 



True separates, i. e. separates paged anew or with any additional matter, such as a new title 

 page or title page cover, are indicated by the word Separate. 



The fourth of these Special Bibliographies may not be issued for several years, the 

 editor's other duties preventing him from employing his time in their sujiervision. 



Corrections and additions will be thankfully received by the editor. 



GEORGE DIMMOCK. 



Camkriuge, M.4.SS., U. S. A., August 1879. 



