14 



INDIANA UNIVERSITY STUDIES 



anal ray (second line in front of dorsal) in the female usually plainest; 

 males with the corresponding line also plainest. Very rarely a vertically 

 elongate humeral spot in the male ; dorsal of male with more or less well 

 defined marginal and basal dark bands. 



This species, differing in the number of scales, position of dorsal, size of 

 the intromittent organ and color, is very closely allied, if not identical with 

 Poecilia festae Boulenger from the hot springs, 35° Centigrade, S. Vincenta. 



Microglanis variegatus Eigenmann and Henn, sp. nov. 



Type, 45 mm. 13106 I. U. M. Paratypes 36-45 mm. Forest pool near Vinces. 

 Arthur Henn. 



Head 3.5 ; depth 5 ; D. 6 ; A. 10 or 11 ; width of head a little greater 

 than its length ; eye 3 in interocular, about 54 in the head. Head covered 

 with thin skin ; frontal fontanel extending to posterior margin of eye ; 

 occipital fontanel minute ; mouth terminal, the lower jaw slightly the long- 

 er ; width of miouth about equal to half the greatest width of the head ; 

 premaxillary bands of teeth very narrow, without backward-projecting 

 angles, the length of the bands about half the width of the mouth ; max- 

 illary barbels extending to tip or a little beyond tip of humeral spine; 

 posterior mental barbel lint little shorter than the maxillary barbel ; the 

 anterior mental barbel to or a little beyond the gill -opening ; gill-mem- 

 branes narrowly joined to the isthmus ; occipital process articulating with 

 the dorsal plate which it meets about half way ; origin of dorsal nearly 

 equidistant from snoiit and adipose, the spine strong, shorter than the rays, 

 3 in the head: adipose fin reaciiiDg caudal, its length not equal to its 

 distance from the dorsal, its posterior margin free, its length about 5 in the 

 length ; caudal slightly emarginate, about 5 in the length, its fulcra prom- 

 inent ; base of anal about equal to base of adipose, its tip reaching caudal ; 

 ventrals not reaching anal, their origin on or behind the vertical from the 

 last dorsal ray ; pectoral spine stout, one-half to two-thirds as long as 

 head, with about S-13 strong hooks behind, less prominent spines in front ; 

 humeral spine reaching to near middle or last third of the pectoral siiine. 



Adult variegated ; fins like the body, traces of a darker band through 

 the dorsal ; belly white. Young marbled or less finely variegated. A 

 lighter area through basal half of caudal. 



Hemicetopsis amphiloxus Eigenmann, sp. nov. 



5332 G. M. Typo 88 nun. Creek near San Lorenzo, Patia basin. Jan. 14, 



1913. Henn and Wilson. 

 13040 I. U. M. Para type, 97 min. Rio San Juan at mouth of Rio Munguido. 



Henn. 



13009 I. U. M. Paratype, .53 mm., Quibdo. Coll. Wilson. 



Head 4.5-4.6(; : depth 4.33-5 ; D. 7 ; A. 30 ; V. 6 or 7. 



Snout broader and more blunt than in otlionops. Eye 2.5 in interor- 

 bital, 7 in head. Premaxillary with two irregular series of teeth, vomer 

 with a single series; mandible with a single series on the sides, two or 

 three near the symphysis; first dorsal ray not prolonged in a filament; 

 inner >'entral ray adnate for half of more of its length, the longest ray^ 



