ORTMANN : THE CRAWFISHES OF THE STATE OF PENNSYLVANIA 407 



IijJxoTs: ('liicafio, Cook County, (Hagen) ; Evaiistoii. Cook County, (Hagen) ; 

 i>a\vn Riilge, Marshall County, (Hagen); AbingtlDU, Knox ( 'ounly, (Faxon); 

 Decatur, Macon County, (Faxon): IjcUcvillc, St. Clair County, (llagun). 



WiscoNsix : "Abundant in Wisconsin," (Bundy); Uacine. Racine County, 

 (Faxon); Creen ('ounly, (l-'axon); Appleton, Outaganu<- (I'unty, (Faxon). 



Minnesota: Fort Snelling, Hennepin ('ounty. (I'^ixon). 



Iowa: l)avcii|)ort, Scott County, (Faxon): i'cllii. Delaware Count}', (Faxon) ; 

 Belniond, Wright County, (Faxon). 



Missouri: St. Louis, St. Louis (.'ounty, (Faxon); Carroll County, (Faxon). 



Kansas: Leavenworth, Leavenworth County, (Faxon); Lawrence, Douglas 

 County, (Harris). 



Arkansas: Paragould, <jireene (ounty, (Faxon); Fayetteville, Washington 

 County, (Faxon). 



Mississippi: Monticello. Lawrence County, (Hagen). 



Louisiana : New Orleans, (Hagen). 



Wyoming : Cheyenne, Laramie County, (Faxon). 



Colorado: Clear Lake, (Faxon)-"; Boulder, Boulder County, (Harris)'". 



RE.ALVRKS. 



CamharuH (liot/encs occupies two areas, in the United States, which, according to 

 oui' |in'siiit knowledge, are separated from each otlier ; a western and an eastern. 

 Both areas enti'r Fennsylvania, the one extending over a large portion of the south- 

 western territory of tills stall', tin' other heiiig mueli smaller and restricted to the 

 southeastern cxln'iiiity. 



1 have closely studied the material at hand, and have found certain dillerences 

 between eastern and western specimens, which however are very slight, and not 

 always constant; yet a tendency to a morphological separation between the eastern 

 and western forms seems to be indicated. Faxon (1H85((. p. 7".^) has already called 

 attention to some of these differences. 



The description given al)ove refers chietly to the ((islcrn form of this specie.". 

 Speciiiieiis from western I'emisylvania show the following ilitlei-eiices : 



1. Arcolii ill most cases not entirely obliterated. There are, indeed, casfs in the 

 eastern form whric tjie two lines bordering the branchial regions are not in contact, 

 lint they are rare. In western Pennsylvania the latter condition is rather the rule, 

 although specimens in which lioth lines unite, forming in the ini<ldle only one line. 



*" Location uiikiio>Mi to the wiitur. 



'" Professor T. 0. A. Cockerell lins sent to me for exniiiinntion a joiini; ninlc collected ( tctolier 7, l!)ir>, in ii sniiill 

 stream mar r.oiilder. Although very Hmiill it clearly lu'lonia;* to this species. 



