130 Field Museum of Natural History — Zoology, Vol. X. 



Philypnus maculatus Gunther. 



Lanbus maculatus Gunther, Cat., i, 1859, 505 (Ecuador). 



Philypnus maculatus Regan, Biol. Cent. Amer., 1906, 5; — Regan, 

 Ann. & Mag. Nat. Hist., 1908, 464 (Rio Ballena, Costa Rica). 



In this species the lateral band is formed of dark blotches which are 

 in most cases indistinct up to about 1 70 mm. These spots run together, 

 forming a narrow dark stripe in specimens 200 mm. and larger. The 

 caudal fin in smaller specimens with small spots arranged in about 10 

 narrow dark vertical bars. 



Orotina, Rio Grande (38), 65 to 255 mm.; Tiurubales (2), 140 and 

 160 mm.; Orotina, April 20 (2), 180 and 235 mm.; Jesus Maria (23), 40 

 to 130 mm. 



Dormitator maculatus (Bloch). 



' Sci(Bna ntaculata Bloch, Ausl. Fische, 1790, 299, fig. 2 (West Indies). 

 Dormitator maculatus Regan, Biol. Cent. Amer., 1906, 8 (Southern 



Mexico; Haiti; St. Croix). 

 This species is very variable, and it seems quite impossible to separate 

 the east and west forms, when a considerable amount of material from 

 both sides is compared. The relation of the east and west forms will 

 be treated of by Meek and Hildebrand in their report on the collections 

 of fishes made by them in Panama. 



Jesus Maria (5), 48 to 82 mm.; Rio Caiias, Taboga (4), 60 to 90 mm. 



Guavina guavina (Cuvier & Valenciennes). 



Eleotris guavina Cuvier & Valenciennes, Hist. Nat. Poiss., xii, 1S37, 

 223 (Martinique). 



This species inhabits Atlantic Coast streams from Mexico to Brazil. 

 I did not secure any specimens in Costa Rica. My collecting was done 

 in streams on the eastern side at a greater altitude than this species 

 usually attains. 



Eleotris macrolepis sp. nov. 



TxTJe No. 7775, F. M. N. H.; length 40 mm.; Jesus Maria, Costa 

 Rica. 



Head 3.15; depth 5.55; D V. 9; A 1-7; scales 7,^. 



Body subterete to slightly compressed posteriorly; head depressed; 

 lower jaw the longer; maxillary reaching to anterior third of eye; 



