124 



identity of lilius as there seem to be two species involved. For the 

 present we follow Skinner in making tibullus a synonym of properhus. 



T. pacuvius Lint. 



Godman & Salvin's figure of the genitalia of this species (Biol. 

 Cent. Am. PL 91, Fig. 17) agrees with that of scudderi Skin, rather 

 than with what Skinner figures as those of pacuvius although Skinner 

 places Godman & Salvin's reference under pacuvius. The type $ 

 should be in the Edwards' Collection at Pittsburg; we wonder if Dr. 

 Skinner has seen it so that we may accept his identification as correct. 



T. tatius Edw. 



The single $ type is in the Neumoegen Collection in Brooklyn ; 

 this specimen shows on the underside of the hind wings a partial ter- 

 minal border of white blotches; the type series in the Edwards' Col- 

 lection of clitus, described from the same locality, contains specimens 

 both with and without this white border; otherwise the two forms 

 cannot be separated superficially. We do not know if these white 

 spots will prove of specific value as we have made no study of the 

 genitalia, but it would seem well to restrict the name clitus to the form 

 without these white marks. Tatius is probably closely related to albo- 

 marginatus G. & S. but the spots do not form a continuous band as 

 in the figure in the Biologia (PI. 91, Fig. 20) nor do they extend so 

 far toward the costa. 



Genus Carterocephalus Led. 



Dyar's usage of the genus Pamphila for palaemon will not hold, 

 the type of Pamphila, as we show later on, being comma L. Tutt uses 

 the genus Cyclopides Hbn. for this species, based on a supposed restric- 

 tion of Stephens in 1834 and 1850 which we have already criticized; 

 Staudinger's action in 1861 (Cat. 15) would seem to be more of a 

 restriction as he uses it for a single species morpheas (stcropcs) and 

 this is confirmed by Butler in 1870, who definitely names morpheus 

 the type of the genus; Scudder's action in 1875 in naming metis as 

 type is based on a peculiar system of reasoning, the fallacy of which 

 has been shown by Bethune-Baker (Ent. Rec. XXVI, 133). The well 

 known name Carterocephalus Led. may once more be used for this 

 genus, the type being fixed as palaemon in 1867 by Snellen. 



