244 



endemic], and Stemopygus) in the Maracaibo basin attain much larger sizes than 

 conspecifics or closely related taxa in other parts of their ranges (D. C. Taphom, 

 personal communication). Evidently, A. pardalis is one such species that exhibits the 

 unique phenomenon of gigantism in this region. 



Material Examined -i„". 



. Type material . - Holotype : ZMUC 207 (female?, 415), Venezuela, exact 

 locality unknown. 



Venezuela . - Zulia : CAS-SU 36497 (1, 121), river tributary on E side of Lake 

 Maracaibo, 10 km S of Lagunillas, 23 March 1938, F. F. Bond. MCZ 37210 

 (paratype oiA.freiei; female ?, 215), Rio [ci6nega] Agua Caliente 2-3 km above 

 Lake Maracaibo, 1 May 1942. FMNH 41991 (female, 215), Lake Maracaibo, 1911, 

 W. H. Osgood. USNM 121260 (female, 208; holotype oiA.freiei) and USNM 

 121261 (female, 230; paratype oiA.freiei), Rio Agua Caliente 2-3 km above Lake 

 Maracaibo, 1 May 1942. USNM 121262 (male, 385; female, 208; paratypes oiA. 

 f r freiei), Rfo Negro below mouth of Rio Yasa, 2 March 1942, L. P. Schultz. 

 -' * " " Colombia . - Antioquia : FMNH 59355 (male, 325), Rio Magdalena at Puerto 

 Berrio, C. H. Eigenmann. NRM-SOK/ 1989046.5908 (1, 156), Buchad6, Cano 

 PonelaoUa and mouth of Rio Guaquand6 about 1 km downstream from Buchad6, 

 28 January 1989, S. O. Kullander et al. Bolivar : FMNH 59351 (male, 425), Rio 

 Magdalena at Calamar, C. H. Eigenmann. Choco : CAS 12686 (male, 295), Rio 

 Truando, 1913, A Hem and C. Wilson. CAS 13182 (male, 312), Rio Atrato at 

 Quibdo, 1913, C. H. Eigenmann. FMHN 59353 (male, 327) and FMNH 59354 

 (male, 375), Rio Atrato at Quibdo, C. H. Eigenmann. NRM-SOK/ 1989044.5855 (1, 

 80), Rio Napipi, river bank at village, 26 January 1989, S. O. Kullander et al. 

 USNM 270813 (1, 205), Rfo Atrato at town of Rio Sucio, 9 February 1968, H. 



