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BULLETIN OF THE BUREAU OF FISHERIES 
CAMBARUS (FAXONIUS) IMMUNIS SPINIROSTRIS FAXON 
Cambarus immunis var. spinirostris, Faxon, 1885, p. 146; Faxon, 1885a, p. 99; Hay, 1896, p. 502; Pearse, 1910, p 20. 
Male, Form I. 
Generally smaller than C. immunis; rostrum with small but acute lateral teeth; 
post-orbital spines well developed; lateral spines strong and acute; areola wider 
and slightly shorter than C. immunis; first abdominal appendages as in C. immunis. 
Colorado localities. — Empire Reservoir near Deerfield, Weld County. Other 
specimens, labeled as C. immunis, in the University of Colorado collections are 
without definite locality records. 
Nebraska localities. — Big Horseshoe pond, State fair grounds, Lincoln, Lan- 
caster County; Stevens Creek, Havelock, Lancaster County; Louisville, Richard- 
son County, collected by Theodore Stander. 
CAMBARUS (FAXONIUS) NEGLECTUS FAXON 
Cambarus neglectus, Faxon, 1914, p. 375. 
Cambarus ( Faxonius ) neglectus, Ortmann, 1905a, p. 112. 
Male, Form I. 
Body small, not very robust; rostrum long, deeply excavated, margins raised, 
subparallel; marginal teeth small; acumen long, with horny tip, carinated; post- 
orbital ridges not prominent; spine blunt; cervical groove not deep, broken; areola 
broad, posterior triangle slightly larger than anterior; carapace subovate, depressed, 
punctuate; lateral spine very small; chela heavy and short, punctuate, slightly 
pubescent, inner finger longer, no excision at base of fingers; cutting edge of fingers 
with single row of small tubercles; carpus furrowed above, one large and one small 
spine on inner side; hooks on third periopods; first pair of abdominal appendages 
reaching to base of second periopods, long, slender, horny, bispinose, outer half 
longer, with slightly curving tip, inner half more slender, with slightly curving 
spatulate tip. 
Colorado localities. — Republican River at Wray, Yuma County; Black Wolf 
Creek, tributary of Arikarre River, Yuma County; Arikarre River, Beecher’s 
Island, Yuma County; South Platte River, Julesberg, Sedgwick County. 
This species should be found in both the South Platte River drainage and in 
the Republican River drainage of Nebraska. 
CAMBARUS (BARTON I US) DIOGENES GIRARD 
Cambarus diogenes, Girard, 1854, p. 88; Faxon, 1885, p. 144; Faxon, 1885a, p. 71; Faxon, 1885b, p. 359; Faxon, 1885a, p. 140; Faxon, 
1890, p. 624; Hay, 1896, p. 489; Faxon, 1898, p. 650; Osburn and Williamson, 1898, p. 21; Williamson, 1899, pp. 20 and 48; 
Hay, 1899, pp. 959 and 961; Harris, 1900, p. 267; Ortmann, 1905, p. 398; Pearse, 1910, p. 20. 
Cambarus obesus, Hagen, 1870, p. 81; Smith, 1874, p. 639; Forbes, 1876, pp. 5 and 19; Bundy, 1877, p. 171; Bundy, 1882, p. 183. 
Cambarus dubius, Osburn and Williamson, 1898, p. 21. 
Cambarus ( Bartonius ) diogenes, Ortmann, 1905a, pp. 120 and 135. 
Male, Form I. 
Body robust, smooth except for short hairs on chela and periopods; rostrum 
short, broad, deeply excavated, down-curved, without lateral spines; post-orbital 
ridges low, grooved externally and swollen posteriorly, without spines; carapace 
lightly granulated, with projecting angle just below the eye; no lateral spines; cer- 
vical groove deep and sinuate; areola very narrow, usually obliterated, posterior 
