224' OHIO EXPERIMENT STATION: BULLETIN 194. 



EXPLANATION OF PLATE XII. 



The.Catalpa Sphinx: a, egg-mass; b, newly-hatched larvae; c, a larva one- 

 third grown; d, dorsal view of one its joints; e, f, h, differently marked larvpe; 

 g', dorsal view of one of the joints of f ; i, do. of h; j, pupa; k, moth, natural Size; 

 1, egg enlarged. (From Riley, Rept. Q. S. Commissioner of Agriculture, 1881.) 



