EXPLANATION OF PLATE X. 



Fk;. 1. — III, C'lllterouia m/itlis, Anae I, In-slily hatched, much enlarged; Ih, pi'othnracic segment; Ic, section of 



eighth^abdominal segment; Irf, tubercle of infraspiracular series. 

 Fk;. 2. — 2((, Cithironia reyrilis, near end of stage I; 2l>, subdorsal tubercle of first tlioracic segment; 2c, one of 



dorsal row, same segment. .1. llriijgliam del. 



]7U 



