DEVELOPMENT 



163 



FIG. 225. Section through .left hind wing in larva of Pieris rapes, the section being a 

 frontal one of the caterpillar; the base of the wing is anterior in position, and the apex 

 posterior, c, cuticula; h, hypodermis; t, trachea; w, developing wing. After MAYER. 



m- 



B 



PIG. 226. Internal transformations of Sphinx ligustri. A, larva; B, pupa; C, moth; 

 a, aorta; an, antenna; b, brain; /, fore intestine; fr, food reservoir; k, hind intestine; ht, 

 heart; m, mid intestine; mt, Malpighian tubes; p t proboscis; s, suboesophageal ganglion; 

 t, testis; tg, thoracic ganglia; v, ventral nerve cord. After NEWPORT. 



