670 Dr. G. R Lon^aflf's Bionomic Notes on Butterjiies. 



Tcrias delia, Cram. 



An examination of tliis table shows clearly that the 

 dry form got more prevalent as the season advanced, 

 whereas the wet form disappeared. All the first 7 

 specimens, taken at Savanilla and Colon, 22-29 Dec, are 

 of the form lydia, Felder. The last specimen taken, at 

 Caracas, 25 March, is of the form persistcns, Butl, 



A male taken above Constant Spring, c. 1000 ft., on 

 1 Jan., another male taken a little to the west of Constant 

 Spring, e. 500 ft., on 8 Jan., and a male taken near the 

 railway at Panama on 12 March, all approach the form 

 lydia, Felder, in having the longitudinal black streak 

 broader than usual. On the other hand, the width of the 

 streak in the form lydia varies considerabl}'. 



An aberrant male of the dry form taken on the foot- 

 hills above Constant Spring on 1 Jan. is entirely without 

 the black streak, the orange scales alone marking its 

 position. 



Tcrias dathea, Cramer (Jamaica, Venezuela), appears to 

 be specifically distinct from dclia, but is certainly very 

 closely allied to it; the females are difficult to distinguish, 

 and some specimens of the male sex not easily separable. 



