ORTMANN : THE CRAWFISHES OF THE STATE OF PENNSYLVANIA 349 



affinis = limosus, Schuylkill River at Reading, Bucks County; C. bartoni, Foxburg, 

 Clarion County; Cariisle, Cumberland County; Berwick, Columljia County. 



In Hagen's Monograph (1870) no new species are added, although he doubtfully' 

 records (p. 100) C. obscurus from the state, but this was done under the erroneous 

 assumption that Aducus foasor of Rafinesque is the same as C. obscurios. Thus 

 Hagen's Monograph adds only a few new localities, namely : for C. limosus {affinis) 

 the Schuylkill River, Philadelphia, and Carlisle, Cumberland County. The new 

 locality ''Pittsburgh" for the same species is wrong. 



The great revision of the genus published by Faxon (l<S85a) adds two species: 

 C. diogcnes from Derry, Westmoreland County, and C. rusticus from Pittsburg. 

 The latter record is incorrect, and should be dropped. Besides Faxon gives the fol- 

 lowing new localities: G. limosus, Brandy wine Creek, Chester County; Delaware 

 River, Bristol, Bucks County; Bainbridge, Lancaster County; C. bartoni, Bedford 

 and Pattonville, (see infra, footruote 16), Bedford County; Windham, Bradford 

 (bunty; Hummelstown, Dauphin County; Chester County ; Bainbridge, Lancaster 

 County; McKean County. 



Thus only three species were known up to tliis date : C. limosus, C. bartoni, and 

 C. dio(jencs. 



In 1898 Faxon added a louith species for the state, C. obscurus from Westmore- 

 land County, and also gave a new locality' for C. bartoni, Westmoreland County. 



Williamson (1901) enumerated five species, and one variety from Allegheny 

 County, but, as has been tlcnionstrated by the writer (1905a), this is to be reduced 

 to four species and one vaiiety, of wliich the species recorded as C. dubius by 

 Williamson (C. raonon<jalensis Ortmann) is new^ for the state, as is also the variety V. 

 bartoni robustus Allegheny Count}' is for the first time cited as a locality for the 

 other species, C. obscurus (recorded as C. jii'ojiinqtius and rusticus), C. bartoui, and C. 

 dioijenrfi. Williamson's discoveries brought up the number of species known from 

 the state to five, and one variety, namely : C. limosus, ('. obscurtis, C. bartoni, C. bar- 

 toni robustus, C. mouougalensis (as dubius), and C. diojjenes. 



In tlie i)rtliiiiiiiary report of the writer for western Pennsylvania, two other 

 species were added : C. propinquicsi'ron\ l'"i'ie and Crawford Connties, anil C. carol iuu.'< 

 from Fayette, Westmoreland, and Somerset Counties. Numerous new localities 

 were added to tliose already known. C. dubius of Williamson was recognized as a 

 species new to science, and described as C. mDUouijaJcnsis. The nunil»er of species 

 present in the state has not been increased by subsequent investigations, and stands 

 now as seven, with one variety, namely: Cambarus liuiosus (Rafinesque); C prop- 

 inquusGwiwdi; ('. obscurus Ilagen ; C. bartoni (Fabricius); C. bartoui robustus (Gmwd); 

 C. carolinus Erichson ; C. nujnougalensis Ortmann ; C. dioycncs Girard. 



