446 Journal of Agricultural Research vol. xx, No. 6 



LARVAI, INSTARS 



First-instar larva 0.53 to 0.60 mm. long, 0.37 to 0.43 mm. wide; 

 pearly white; head about 0.25 mm. wide, 0.26 long. 



Second-instar larva 0.65 to 0.80 mm. long, 0.5 to 0.65 mm. wide; head 

 0.32 mm. wide, 0.36 mm. long. 



Third-instar larva 0.75 to 1.3 mm. long, 0.6 to 1 mm. wide; head 0.42 

 to 0.45 mm. wide, about 0.52 mm. long. 



Fourth-instar larva 1.5 to 3.5 mm. long, 1 to 2.5 mm. wide; head about 

 0.57 mm. wide, about 0.80 mm. long. 



PUPA 



The pupa is uniformly white when first transformed, 3.5 to 4.25 mm. 

 long, and about 1.65 mm. wide. The tips of the wing pads attain the fifth 

 abdominal segment; the tips of metathoracic tarsi extend beyond the tips 

 of the inner wings. The head is oval, the beak elongate and slender. The 

 head has two prominent spines towards the vertex, a group of two spines 

 and two spinules on each side above the eyes, two pairs of small spines 

 near the anterior margin, and a small one on each side of the front 

 between the eyes. There are three pairs of spines on the beak between 

 the frontal ones and the base of antenna, a pair of small ones on the beak 

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

 of the beak between the latter pair and the tip of the beak, and two pairs 

 on the tip of the beak. 



The prothorax is provided with one pair of antero-marginal, setigerous 

 tubercles, one pair of antero-lateral, two pairs of medio-lateral, and 

 four pairs of dorsal setigerous tubercles. The mesonotum and meta- 

 notum are each provided with two pairs of spines. The abdomen has 

 seven distinct dorsal tergites, the seventh being somewhat larger than 

 the rest. The dorsal area of each is armed with a pair of large spines 

 and a pair of smaller ones. The lateral area of each tergite is armed with 

 a spine at the base of which is a small seta. The epipleural lobes are each 

 armed with two minute setae. One pair of the dorsal spines of the seventh 

 abdominal segment is much larger than the rest and is usually directed 

 cephalad; the second pair is small and slender and is directed caudad. 

 The ninth abdominal segment is armed with two fleshy processes. 



