630 NORTH AMERICAN ASTACID.E FAXON. 



In tbe second form of the male the first abdominal appendages are 

 cleft but a short distance. The terminal part of the appendage is 

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

 are rather blunt. 



The annulus ventralis of the female is triangular, with a deep trans- 

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

 culate in front. 



Dimensions of a male, form II: Length, GS ,um ; cephalothorax, 32 ram ; 

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

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

 36mm. chela, 25 by 10.5 mm . 



Mill Creek, Wabaunsee County, Kansas; Republican River, near 

 Guy, Cheyenne County, Kansas ; Sappa Creek, Oberlin, Kansas. 

 (M. C. Z.). 



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

 Astacida), page 94, under G. propinquus. When that work was writteu 

 I had seen but three specimens of this crayfish, all of them second-form 

 males, without locality. Collections sent from Kansas by Prof. F. VV. 

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

 appearance this species nearly resembles G. propinquus, but the fore 

 border of the carapace is angulated under the eye, and the sexual ap- 

 pendages of the male are quire different, resembling those of G. rusticus 

 placidus. The annulus ventralis of the female is different also. 



The tips of the fingers in recent alcoholic specimens are orauge col- 

 ored, preceded by a dark annular baud. 



Cambarus virilis Hag. 



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

 of Battle Creek, Michigan ; Bear Creek and Hinkson Creek, Columbia, 

 Missouri; West Fork of Black Rirer, Reynolds County, Missouri; trib- 

 utaries of Kansas River ami Ward's Creek, Shawnee County, Kansas; 

 Wabaunsee County, Kansas; Garden City, Kansas; Sappa Creek, 

 Oberlin, Kansas; Osage River, La Cygne, Kansas; Topeka, Kansas ; 

 Five-mile Creek, tributary of Spring River, Indian Territory (1 mile 

 south of Kansas line, near Baxter Springs, Kansas). (U. S. K M., 

 M. C. Z., and U. S. F. C.) 



Together with specimens of G. setosus from wells iu Jasper County, 

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

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

 identify with certainty, but are probably G. drills Hag. The speci- 

 mens from the West Fork of Black River, Missouri, differ somewhat 

 from the typical G. virilis, agreeiug with those described on page 98 of 

 my Revision of the Astacidoe, from Irondale, Missouri. 



