230 ^Iv. C. T. Reg-aii on (he South- American 



abdomen, seen from above, not showinp^ black bair projecting 

 at tbc sides ; last dorsal segment in lateral profile not in the 

 least concave ; bair on inner side of bind tarsi longer, coarser, 

 and redder, being very brigbt ferrnginous. Clypeal margin 

 straight and simple, but there is a strong subinarginal 

 channel ; abdomen shovel-sJia))ed, with very conspicuous 

 Mliite hair-bands ; ventral scojja cream-eolour, black on the 

 last segment; maxillary palpi stout, third joint longest; 

 second joint of labial palpi conspicuously longer than first. 



Hah. Boulder, Colorado, at flowers of Opuntia, collecting 

 pollen, July 3, 1905 {W. P. Cockerell). 



University of Colorado, 



Boulder, Colorado, U.S.A., 



Jan. 2, 1906. 



XXIX. — A Revision <>j the Fishes of the South-American 

 Cichtid Genera Ciclila, Chaetobraucluis_, and Chreto- 

 branchopsis, with Notts on the Genera of American Cichlidae. 

 By C. Tate Regan, B.A. 



The present paper is the last of a series describing the 

 American Ciclilid 86 in the British Museum*, and has been 

 written in order to complete my account of the group. It 

 has seemed useful to give a synopsis of all the genera and to 

 offer some remarks on their relationships and di!?tribution. 



I. — A Revision of the Genera Cichla, Ciimtobranchvs, 



AND CrM TOBSAyCROPSIS. 



Cichla. 



Cichla, Schneider, Bloch's Syst. Iclith. p. 340 (1801); Cuv. Re^ne 

 Anim. ii. p. 1^70 1 1817) : Ileck. Ann. Mu-^. Wien, ii. 1840, p. 408 ; 

 Guiitb. ("at. Fish. iv. p. •"'.OS (1802) ; Eigfum. & Brfly, Aun. Ac. X. 

 York, vii. 1894, p. Oil ; I'ellegr. Mem. Soc. Zool. 1- ranee, xvi. 1903, 

 p. 183 (1904). 



* My papers dealing- witii the American Cichlidje have been publ'shed 

 as follows: — Proc. Zool. Soc. 1905, i. pp. 152-168, pis. xiv. & xv. {Crena- 

 cara, Batrachops, and Crenicichla) ; Ann. & Mag. Nat. Hist. (7) xv. 

 1905, pp. 329-347 (Acara, Aannacara, Acnrojjsin, and Astronotus)] t. c. 

 pp. 557-558 {Acara suhucularis) ; ib. xvi. 1905, pp. 60-77, 225-243, 

 316-340 {Cichlosoma) ; t. c. pp. 433-445 {Petenia, llerichthys, Paraiiee- 

 troplus, Neetrophis, Herotilapin, Uaru, Symphysodon, and Iter ojjhy Hum); 

 ih. xvii. 190(>, pp. 49-66 {Uctroctdus, Ovophayns, Hetcroyranuna, and 

 Bioiotcus). 



I 



