THE CATFISHES OF VENEZUELA — SCHULTZ 279 



26. Bilobed teeth of outer row of premaxillaries gradually changing to broadly 

 pointed incisors laterally; nasal flap ending in a barblet; adipose fin 

 elongate but no spine showing; interorbital space about equal to distance 

 from eye to posterior nostril; pelvics reach from three-quarters way to a 

 little beyond anus; pectorals extending one-half to two-thirds way out 

 pelvics; pelvics inserted a little behind origin of dorsal; maxillary bar- 

 bel reaches to gill opening or beyond; anus closer to base of caudal than 



gill opening Astroblepus festae (Boulenger) 



2c. Outer row of premaxillary teeth incisors, but sometimes with a notch at 

 centers; these teeth never sharp-pointed. 

 6a. Teeth of both upper and lower jaws broad incisors; adipose fin with spine 

 connected to caudal peduncle by a membrane; interorbital space a 

 little shorter than distance from eye to posterior nostril; pelvics in- 

 serted under or a trifle in front of dorsal origin; pectoral spine reaches 

 to middle of pelvics; nasal flap ending in a barblet; barbel reaches to 

 gill opening; pelvics extending one-half way to anus (Magdalena 



system, Colombia) Astroblepus chapmani (Eigenmann) 



6b. Teeth of only upper jaw incisors, those of lower jaw bilobed; adipose fin 

 without spine or with it embedded and only tip showing; pelvics extend- 

 ing one-half to two-thirds way to anus; pectorals extending one-third 

 to one-half way out pelvics; nasal flap not ending in a barbel. 

 7a. Pelvics inserted considerably in advance of dorsal origin; maxillary 

 barbel reaching to rear of lip or one-half way to gill opening; adi- 

 pose fin with spine embedded but showing; interorbital space equals 

 distance from eye to posterior nasal opening f PJo Negro in Colombia). 



Astroblepus latidens Eigenmann 

 76. Pelvics inserted under or almost under dorsal origin; adipose fin with- 

 out an evident spine. 

 8a. Interorbital about equal to distance from eye to posterior nasal 

 opening; maxillary barbel reaching about three-quarters to four- 

 fifths way to gill opening; pelvics reach two-thirds way to anus 



(Peru) Astroblepus simonsi (Regan) 



86. Interorbital a little less than distance from eye to posterior nasal 

 opening; pelvics reaching one-half to tliree-fifths way to anus 



(Peru) Astroblepus peruanus (Steindachner) 



16. In outer row all lateral teeth on premaxillary unicuspid, but sometimes blunt 

 pointed, often one or two pairs of bicuspid teeth occurring at midline. 

 9o. Adipose fin absent or almost absent, at least not developed enough to be 

 definitely evident; pelvics inserted under dorsal origin; maxillary barbel 

 extending three-quarters to four-fifths way to gill opening; pelvics reach- 

 ing two-thirds to three-quarters way to anus; interorbital space a little 

 less than distance from eye to posterior nasal opening; pectorals extend- 

 ing one-third to one-half way out pelvic?.; nasal flap without barbel 



(Peru and Ecuador) Astroblepus vanceae " (Eigenmann) 



96. Adipose fin developed, with a free spine or with it embedded in adipose 

 tissue of fin or with it absent. 

 10a. Insertion of pelvics considerably in advance of a vertical line through 

 origin of dorsal fin ; interorbital space a little narrower than distance 

 from eye to posterior nasal opening. 



"To this species I refer as a synonym Astroblepus mariae (Fowler). 



