90 
BULLETIN OP THE BUREAU OF FISHERIES 
CAMBARUS (CAMBARUS) SIMULANS FAXON 
Cambarus simulans, Faxon, 1885, p. 112; Faxon, 1885a, p. 48. 
Cambarus ( Cambarus) simulans, Ortmann, 1905a, p. 105. 
Male, Form I. 
“Rostrum broad, deeply excavated; margins raised into sharp crests which 
overhang the base of the sides of the rostrum, converging, sinuated before the 
tip to form the short acumen; no lateral spines; the acumen is barely margined. 
P.ost-orbital ridges subacute in front, divergent and ending in slight callosities 
behind. Carapace ovate, narrowing in front, gastric area smooth, cardiac area 
lightly punctate, sides granulate; anterior border notched behind the antennae; 
cervical groove sinuate, split on the sides, with a minute terminal branchiostegian 
spine; no lateral spine; areola more than one-half as long as the distance from the 
point of the rostrum to cervical groove, narrow, carinate, expanding into an anterior 
and a posterior triangular field; * * *. Chela long, slender, squamoso-tuber- 
culate, internal margin long, straight, strongly dentate; fingers long, punctate, 
external border of movable finger tuberculate, inner border of both fingers toothed, 
a prominent tubercle near the base of external finger opposite a more or less clearly 
marked incision in the base of the thumb. * * *. Third pair of legs hooked. 
First pair of abdominal appendages strong, straight; internal part with a very 
small, straight apical spine, which does not reach the end of the external part; 
external part with two horny terminal teeth, one of which is fiat and disk-shaped, 
the other slender and somewhat curved.” (Faxon, 1885, p. 112.) 
Colorado locality . — One collection from the north fork of the Smoky Hill 
River, near Oriska, Kit Carson County. I have been unable to obtain this speci- 
men. Place records are from the records of the Museum of the University of 
Colorado, noting a single collection of C. simulans, determined by Faxon, but the 
specimens have been lost. 
CAMBARUS (FAXONIUS) PROPINQUUS GIRARD 
Cambarus propinquus, Girard, 1854, p. 88; Hagen, 1870, p. 67, PI. I, fi. 34-38, PI. Ill, f. 153; Smith, 1874, p. 638; Forbes, 1876, pp. 
4 and 19; Bundy, 1877, p. 171; Bundy, 1882, p. 181; Bundy, 1882a, p. 402; Faxon, 1885, p. 147; Faxon, 1885a, p. 91; Faxon, 1885b, 
p. 360; Faxon, 1890, p. 628; Hay, 1896, p. 497; Faxon, 1898, p. 651; Hay, 1899, pp. 960 and 962; Ortmann, 1905, p. 400; Pearse, 
1910, p. 16. 
Cambarus ( Faxonius ) propinquus, Ortmann, 1905a, pp. 112 and 132. 
Male, Form I. 
Body small, not pubescent, few hairs on chelae; rostrum long, narrow, margins 
thin, spines on anterior end of rostrum, posterior to acumen; acumen long and tri- 
angular; rostrum carinated; post-orbital ridges short, grooved on outer surface, 
spines short and acute; carapace subovate, depressed or flattened dorsally; cervical 
groove deep, slightly sinuate, broken on sides; areola broad and smooth; chelae 
short, rounded, slightly pitted on surface; third periopods hooked; first pair of 
abdominal appendages short and spiral shaped ; the free tips long and slender, not 
recurved; general color dark olive green; chelte olive yellow, mottled with olive 
green; finger tips orange, followed proximally by band of citron yellow. This color 
character is quite constant. 
Nebraska locality .—Coon Creek, Milford, Seward County, several colonies. 
