THE CATFISHES OF VEXEZLTEILA — SCHULTZ 281 



19a. Interorbital space equal to or a little greater than distance 

 from eye to margin of posterior nasal opening. 

 20a. Nasal flap without a barbel at its tip; pelvics reaching a 

 little beyond anus; pectorals reaching three-fourths way 

 out pelvics. 

 21a. Spine of adipose fin embedded, its tip sometimes showing 

 (Ecuador, Colombia, northern Venezuela). 



Astroblepus chotae ^o (Regan) 

 216. No trace of spine in adipose fin. 



Astroblepus pirrense (Meek and Hildebrand) 

 20b. Nasal flap with a short barbel at its tip; pelvics reach to 

 anus; pectorals extend halfway out pelvics (Peru). 



Astroblepus rosei Eigenmann 



19b. Interorbital space a little less than distance from eye to margin 



of posterior nasal opening. 



22a. Pelvics reaching two-thirds way to anus; pectorals reaching 



two- thirds way out pelvics; triangular nasal flap without a 



barblet at its tip (Peru to Colombia). 



Astroblepus taczanowskii (Boulenger) 

 226. Pelvics reaching to anus or a little beyond; pectorals one- 

 third to one-half way out pelvics; nasal flap sometimes 

 with a small barblet (Ecuador to Colombia). 



Astroblepus grixalvii ^^ Humlioldt 

 186. Ma.xillary barbel not reaching to gill opening. 



23a. Pelvics reaching to anus or beyond; interorbital space a 



little shorter than distance between eye and margin of 



posterior nasal opening; nasal flap without a barbel. 



24a. Maxillary barbel reaching halfway to gill opening; 



pectorals extend to middle of pelvics (Peru and 



Ecuador). 



Astroblepus sabalo ^^ (Cuvier and Valenciennes) 

 246. Maxillary barbel reaching three-fourths to four-fifths 

 way to gill opening; pectorals extending two- 

 thirds to three-fourths waj' out pelvics (Magdalena 



system) Astroblepus micresens Eigenmann 



236. Pelvics not reaching to anus; nasal flap without barblet 

 at its tip. 

 25a. Maxillary barbel relatively long, reaching three-fourths 

 to four- fifths way to gill opening; no pale bar across 

 caudal peduncle; pectorals extending two-thirds way 

 out pelvics; interorbital space a little narrower than 

 distance from eye to rim of posterior nasal opening; 

 pelvics reaching two-thirds to three-fourths way to 

 anus (Peru and Bolivia). 



Astroblepus longiceps Pearson 



256. Maxillary barbel short reaching not over halfway to 



gill openings, usually about opposite the lower lip. 



26a. Pelvics reaching only halfway to anus; interorbital 



space a little wider than distance from eye to 



JO To this species I refer as a synonym A. marmorattis (Regan). 



»i To this species I follow Eigenmann and refer as synonyms the following species: >4. prenadilla (Cuvier 

 and Valenciennes); A. brachycephalus (Giinther); A. vaillanti (Regan); A. regani (Pellegrin); A. whymperi 

 (Boulenger); A. eigenmanni (Regan). 



" I refer to this species as a sjTionym A. ubidiai Pellegrin, which was described from Lake St. Paul. 



