NORTH AMERICAN ASTACID.E FAXON. 



Iln^the second form of the male the first abdominal appendages are 

 eblett'ti but a short distance. The terminal part of the appendage is 

 sstoeuater than in the first form, and not horny, and the tips of the rami 

 $&<:& rather blunt. 



TEhe^ annul us ventralis of the female is triangular, with a deep trans- 

 veerse fossa bounded on all sides by a prominent wall which is bituber- 

 ceihi&te in front. 



IIMmensions of a male, form II: Length, 68 mm ; cephalothorax, 32 mm ; 

 ffoom end of rostrum to cervical groove, 21 mm ; from cervical groove to 

 ppefeterior margin of carapace, ll mm ; width of areola, 2 mm ; abdomen, 

 3g($ffi>m.. c bela, 25 by 10.5 mm . 



I\MiHl Creek, Wabaunsee County, Kansas; Republican River, near 

 GBkpy, Cheyenne County, Kansas ; Sappa Creek, Oberliu, Kansas. 

 (JMJUD. Z.)- 



TDMs is the species mentioned, but not named, in my Revision of the 

 iytstacidse, page 9i, under C. propinquus. When that work was written 

 Ilhhaid seen but three specimens of this crayfish, all of them second form 

 nm&les, without locality. Collections sent from Kansas by Prof. F. W. 

 OStggin supply the first form of the male and the female. In general 

 af»§>pearance this species nearly resembles C. propinqtius, but the fore 

 bborder of the carapace is augulated under the eye, and the sexual ap- 

 ppeiidages of the male are quite different, resembling those of C. rusticus 

 pplabitius. The auuulus ventralis of the female is different also. 



TDhe tips of the fingers in recent alcoholic specimens are orange col- 

 oordd* preceded by a dark annular band. 



Cambarus virilis Hag. 



Additional localities: Spencer Creek, Michigan; Baruum Lake, south 

 oofiBattle Creek, Michigan ; Bear Creek and Hinkson Creek, Columbia, 

 Miissouri; West Fork of Black River, Reyuolds County, Missouri; trib- 

 utotakies of Kansas River and Ward's Creek, Shawnee County, Kansas; 

 TW&baunsee County, Kansas; Garden City, Kansas; Sappa Creek, 

 OGfcbeMin, Kansas; Osage River, La Cygue, Kansas; Topeka, Kansas; 

 FFrownrile Creek, tributary of Spring River, Indian Territory (L mile 

 ssatifefr of Kausas line, near Baxter Springs, Kansas). (IT. S. N. M., 

 J\M.<JO.:Z., and U. S. F. C.) 



Tlpgether with specimens of C. setosus from wells iu Jasper County, 

 ^Missouri, collected by Miss Ruth Hoppin, occur two very small speci- 

 nmens^of a Cambarus with well developed eyes. They are too young to 

 iddehiHify with certainty, but are probably C. virilis Hag. The speci- 

 nmens'from the West Fork of Black River, Missouri, differ somewhat 

 frffroni Ifche typical C. virilis, agreeing with those described on page 98 of 

 rfijfyREevision of the Astacidte, from Irondale, Missouri. 



