130 Fretp Museum oF NaAturAL History— Zo6.ocy, Vor. X. 
Philypnus maculatus Ginther. 
Lembus maculatus Ginther, Cat., 1, 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 170mm. 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.; Turrubales (2), 140 and 
160 mm.; Orotina, April 20 (2), 180 and 235 mm.; Jesus Maria (23), 40 
to 130 mm. ms 
Dormitator maculatus (Bloch). 
Sciena maculata 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 Cafias, Taboga (4), 60 to 90 mm. 
Guavina guavina (Cuvier & Valenciennes). 
Eleotris guavina Cuvier & Valenciennes, Hist. Nat. Poiss., x11, 1837, 
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. 
Type 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 33. 
Body subterete to slightly compressed posteriorly; head depressed; 
lower jaw the longer; maxillary reaching to anterior third of eye; 
