1030 Bulletin ^7, United States National Museum. 



dd. Snout scarcely longer than eye; head shorter, about 4 in length. 

 e. First dorsal about as high as second; scales rather small. 



/. Cheeks and opercles entirely naked; sides with dusky shades. 



MACULATES, 1420. 



,/T. Cheeks and opercles more or less scaly, the cheeks sometimes naked. 

 g. Scales small, about 60 to 70; 65 to 75 pores; checks with small scales; 

 opercle with larger ones; line with rounded confluent blotches. 



A6PRO, 1421. 

 gg. Scales larger, 50 to 60; 50 to 55 pores. 



h. Cheeks and opercles each with some large scales. 



GUNTHERI, 1422. 



hh. Cheeks naked or with small embedded scales; opercles with 



some scales. 



t. Body not very slender, the depth 5% to 5% in length; pec- 

 torals shorter than head. PELTATUS, 1423. 

 ft. Body very slender, the depth 6 to 6% in length; pectorals 

 as long as head. OUACHITJE, 1424. 



ee. First dorsal lower than second; scales large, 44 to 50; head chiefly naked; 

 pectorals as long as head; sides barred with deep-blue green in male. 



ROANOKA, 1425. 

 ERICOSMA (ep, springtime; KOO-/AC&), to adorn): 



bb. Vertebrae about 37; dorsal spines 10 to 12; male with the lower fins tuberculate in 



spring; gill membranes separate; ventrals not widely separated; scales moderate. 



./. Cheeks naked; opercles scaly ; head heavy; fins large; coloration ornate, the male 



with much blue-black and orange. EVIDES, 1426. 



aa. Median line of belly with a series of enlarged and spfnous scales, which are persistent, at 



least posteriorly; ventrals well separated, but the interspace usually less than width of 



base of fin. 



SERRARIA (serra, saw): 

 k. Preopercle finely serrated; gill membranes broadly united across isthmus; scales small, 



about 70. 



/. Coloration of Hadropterus aspro: yellowish, with diffuse, blackish, lateral blotches, 

 depth 5 to 6 in length. SCIERUS, 1427. 



HADROPTERUS: 

 kk. Preopercle strictly entire; gill membranes rather narrowly united; scales larger, about 



60; body robust, deep. 



m. Olivaceous, with dark vertical bars ; fins high; dorsal rays XII-12; depth 5 in 

 length. NIGROFASCIATUS, 1428. 



Subgenus ALVORDIUS, Girard. 

 1418, HADROPTERUS PHOXOCEPHALUS (Nelson). 



Head 3f to 4; depth 5| to 6; eye 4i in head, about equal to snout. 

 D. XI or XII-12 to 14 ; A. II, 8 or 9 ; scales 12-80 to 85-16, 66 to 71 pores. 

 Body rather slender, compressed. Head extremely long, narrow, and 

 tapering, the snout very acuminate. Mouth large, the maxillary reach- 

 ing to the eye ; the lower jaw unusually narrow and long, scarcely 

 shorter than upper; distance between mouth and gill cleft head. Gill 

 membranes somewhat connected. Cheeks, opercles, and neck with small 

 scales ; breast naked ; a strong opercular spine ; ventral line with small 

 caducous shields ; pectoral shorter than head ; ventrals widely separated. 

 Skull more elongate than in H. aspro, the frontal region very narrow ; 

 parietals more convex in cross section than usual in Hadropterus, no supra- 

 occipital crest ; vertebrae 19 -f- 20 = 39. Pyloric coeca 2. Color yellowish 

 brown, but the lateral spots smaller and more numerous than in H. aspro, 



