614 Journal of Agricultural Research vol. xx, No.8 



Measurements of larval stages 



STAGE. WIDTH OP LARVAL HEAD. 



i o. 25 to o. 26 mm. 



2 36 to .37 mm. 



3 47 to .48 mm. 



4 61 to .65 mm. 



PUPA 



Uniformly white when first formed; length 3.75 to 4.25 mm., width 1.75 mm. Tips of 

 elytra attaining fifth abdominal segment, inner wings rudimentary and almost com- 

 pletely concealed by elytra. Tips of metathoracic tarsi extending beyond tips of 

 elytra. Head rounded, .beak elongate. Head has two prominent spines toward 

 vertex, a group of two small spines and two spinules on each side above eyes, two pairs 

 of small spines near anterior margin and one on each side of front between eyes, three 

 pairs of spines on beak between frontal ones and base of antenna, a pair of small ones 

 on beak midway between base of antenna and tip of beak, a pair on sides of beak 

 between latter pair and tip of beak, and two pairs of minute spines on tip of beak. 

 Prothorax provided with one pair of antero-marginal setigerous tubercules, one pair 

 of antero-lateral, two pairs of medio-lateral, and four pairs of dorsal setigerous tubercules; 

 also a pair of minute medio-lateral ventral spines. Mesonotum and metanotum 

 normally each provided with three pairs of spines; one or more pairs often missing. 

 Abdomen with seven distinct dorsal tergites, the seventh being much larger than 

 rest. Dorsal area of each armed with a pair of large spines and a pair of smaller ones. 

 Lateral area of each tergite armed with a spine, at base of which is a small seta. Epi- 

 pleural lobes each obscurely armed with two minute setae. Ninth segment armed as 

 usual with two prominent pleural spines. 



