l:^^ NEW YORK STATE MUSEUM 



states that the number ranges from 26 to 50. each scale bearing a 

 central spine, with others more slender and nearly as long on each 

 side and extending down the base. Mr Johannsen states that the 

 comb of this species consists of from 35 to 40 scales. There is 

 also a difference in the pecten on the air tube, as illustrated bv 



Mi ii 



Yig. 29 Air tube of C. can- 

 tans 



Tig. 30 Pecten tooth 

 much enlarged 



Drs Smith and Drar. Dr Dvar states that the eggs are elliptic, 

 the thickest part one third from the micropyle^ one side flattened ; 

 finely marked with elongate reticulations. 



The larvae fi^om which we have reared this species do not pre- 

 sent anv such marked variation as a rule. .The number of 

 scales on the comb ranges from about 28 to 32, the air tube is only 

 about three times as long as broad, and the pecten is continuous, 

 with no isolated spines near the tip, and slightly beyond there 

 is a compound hair, as represented in the figure. 



Both sexes, larva and pupa, have been carefully described by 

 Johannsen. 



