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PROCEEDINGS OF THE NATIONAL MUSEUM 



ventrally. The fleshy pectoral base is irregularly marked with 

 dusky. The pelvic fins are dusky. 



Females differ from males in bearing almost no marks on the head 

 and body except for very faint adumbrations of the marks behind the 

 eye. The dorsal, anal, and caudal fins are delicately spotted with 

 dusky. The pectorals and pelvics are paler than in males from the 

 same collection. 



Relationships. — Entomacrodus cymatobiotus is very closely related 

 to E. strasburgi and E. chapmani (for differentiation, see key couplets 

 25 and 26). It appears to be closer to E. chapmani than to E. stras- 

 burgi as evidenced by general color pattern. Some males of E. 

 chapmani (pi. 176) exhibit adumbrations of the head color pattern 

 of E. cymatobiotus (pi. 17a), though lacking the spot behind the eye 

 of the latter species. The spot on the head of each of the latter 

 two species results from intensification of the color pattern in the areas 

 where the spots occiu". In E. strasburgi it appears that both the 

 areas where the spots occur in the other two species have been de- 



TABLE 4-2. --Proportional dimensions as percent SL of specimens of Entomacrodus 

 cymatobiotus (for meaning of abbreviations see methods section) 



Holotype of Entomacrodus cymatobiotus 



