THE AMERICAN TETRAGONOPTERINAE. 



277 



32. AsTYANAX LiNEATUs (Perugia) . 

 Plate 44, fig. 2. 



Tetragcmopterus lineatus Perugia, Ann. Mus. civ. storia nat. Genova, 1891, scr. 2a, 10, p. 664 (Matto 

 Grosso; Rio Paraguay); Eigenmann, Proc. U. S. N. M., 1893, 16, p. 53; Ulrey, Ann. N. Y. 

 acad. sci., 1895, 8, p. 281; Boulenger, Traas. Zool. .soc. Lond., 1896, 14, p. 35 (San Luis). 



Astyanax bimaculatus lineatus Eigenm.^nn, Ann. Carnegie mus.) 1907, 4, p. 137 (Sapucay). 



Aslyanax lineatus Eigenm.^j^n, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 433. 



Habitat. — La Plata Basin. 



Specimens examined. 



Catalogue 

 number 



3292 C. 



3293 C. 

 5212 C. 



11520 I. Paratype 

 10240 I. 



Number of 

 specimens 



14 

 2 

 2 



] 



2 



Size 

 in mm. 



75-116 

 88, 114 

 140 about 

 84 

 33,401 



Locality Collector 



Sapucay Haseman 



Urucum Mts., Corumba Haseman 



Santa Cruz de la Sierra, Bolivia Steinbach 



Villa Maria, Rio Paraguay Perugia 



Sapucay Anisits 



This species is distinguished from all other members of the genus by the 

 brown lines between the scales. It resembles in this respect Moenkhausia latis- 

 simus and M. steindachneri as well as Hollandichthys and Pseudochalceus. This 

 is an instance in which the same color-pattern has appeared in five different 

 species, belonging to as many genera and subgenera. 



In the Annals of the Carnegie museum I expressed the opinion that 

 this species is a variety of A . bimaculatus. Through the courtesy of Dr. Gestro 

 of the Genoa Museum I have received one of the cotypes of Perugia. Later 

 Mr. Haseman and Mr. Steinbach collected several specimens. These show it 

 to be distinct from Paraguay specimens of A. bimaculatus, in which series of 

 dots form obscure Unes along the rows of scales. In this species there are 

 definite lines between the rows of scales. 



Head 3.8; depth 2.8; D. 11; A. 26-28; scales 6 to 7-38^-5; eye 3.33; 

 interorbital 3. 



Heavy forward, tapering from ventrals to a slender caudal peduncle whose 

 depth is about 3 in the greatest depth. Pre ventral region rounded, with a series 

 of small median scales; postventral narrowly rounded. Predorsal region 

 rounded, with an almost complete median series of scales. 



• To base of caudal. 

 ^ Perugia gives 34. 



