Jordan and Evcnuann. — Fishes of North America. 1551 



Sf. Opercle witli a distinct dark spot above ; pectoral with a 



dark spot; tips of all the fins orange, otophobus, 1966. 



cc. Lower posterior half of body unlike anterior part, being more or less 



abruptly bright yellow; caudal fin bright yellow; usually a blue spot 



at ba.«o of last ray of anal. 



j. Eegion below lateral line with many blue spots, ledcostictus, 1967. 



j). Region below lateral line with few blue spots or none. 



Ic. Sides of back with two round dusky spots on each side. 



FLAVIVENTER, 1968. 



kk. Sides of back without round dusky spots as above ; dorsal, in 

 young, with a conspicuous ocellus ; colors very brilliant. 



FLAVILATUS, 1969. 



hh. Depth of body about 2J in length ; posterior half of body yellowish ; fins with 



more or less yellowish. paetitus, 1970. 



aa. Upper anterior profile of head straight, not arched; body and tins mostly dusky, 



with pale spots. planifrons, 1971. 



Subgenus EUPOMACENTRUS. 



19«0. EUPOMACENTRUS LEUCORUS (Gilbert). 



Head 3^; depth 2. D. XII, 16; A. II, 13; lateral Hue with 20 pores, 7 to 

 9 crossrows of scales behind its end. Posterior margin of preoi>ercle and 

 lower edge of suborbital ring serrulate; second anal spine very strong, 

 measured from base of sheath much higher than any of the dorsal spines, 

 and as high as highest soft anal ray, its length contained 1^ times in head; 

 margin of anal rather bluntly rounded; the soft dorsal pointed, but not 

 much produced, the longest ray \\ in head; caudal lunate, the lobes verj^ 

 bluntly rounded, the upper longer than the lower; ventrals with the outer 

 ray produced, reaching past vent; pectorals broad, rounded, 1| in head. 

 Interorbital region transversely convex; anterior proiile arched, a slight 

 depression xisually to be recognized on nape and on snout. Head and 

 sides brown, darker on the upper half of body ; no blue spots or lines, and 

 no yellow; caudal peduncle brown like rest of body; all the fins jet- 

 black, the pectorals abruptly margined behind with pure white. Numer- 

 ous specimens, 4A to 5A inches long, were taken at Socorro Island, one of 

 the Eevillagigedo group, off the coast of Mexico by Gilbert and later 

 by McGregor; a well-marked species, well separated from the others. 

 {\evk6c,, white; opoc,, margin.) 



Fomaeeiitrus leucorus, Gilbert, Proc. U.S.Nat. Mus. 1891, 554, Socorro Island. (Coll. 

 Albatross.) 



1961. EUPOMACENTRUS ADUSTUS (Troschel). 



Depth 2^ in total length with caudal ; eye Si in head, equal to snout. D. 

 XII, 14; A. II, 13; preorl)ital and suborbital finely toothed ; caudal forked, 

 the lower lobe shorter. Brown, tinged with violet, crossed by darker ver- 

 tical lines formed by edges of the scales ; a black point in the axil at the 

 upper base of the pectoral ; no dark scapular spot, no white spot at base 

 of last anal ray ; head and base of anal with some sky-blue points ; young 

 with ocellus on base of the soft dorsal; some specimens with caudal 

 yellowish brown, as also pectoral, ventral, and tip of the anal; interme- 

 diate between £. otophorus iind E. xanihurus. Length 3A inches. Cuba 



