74 THE GYPSY MOTH APPENDIX. 



over the posterior end of the body. The newly molted 

 larva is of a pale straw color. 



Second Stage. (Plate 3, Fig. 4.) Length, 15 mm.; 

 width, 3 mm. Form somewhat stouter than in the preced- 

 ing stage. Head relatively smaller, flattened, as wide as 

 long ; eyes less prominent. Clypeus deeply emarginate in 

 front and feebly incised at the middle. Antennae and mouth 

 parts relatively the same as in the last stage ; the body, 

 however, is of a somewhat paler brown color. All the body 

 segments except the last are truncate behind, and bear 

 a well-defined dorsal line. The first thoracic segment is 

 broadest posteriorly and gradually narrows toward the 

 head, but is not quite as wide as the two succeeding seg- 

 ments. The hairs are arranged the same as in the first 

 stage, except that two pairs of hairs arise on the lateral 

 edges of each segment up to the last, which bears only one 

 pair. The caudal appendages are entire but not quite as 

 prominent as in the previous stage, and the legs are a little 

 more slender. The time spent in this stage varies from 

 four to eleven days. 



Tli ird Stage. ( Plate 3 , Fig. 5 . ) After molting the larva 

 measures 22 mm. in length and 4 mm. in width, and is of a 

 light mahogany-brown color, which soon changes to a dark 

 seal brown. The mandibles are stout, and bear a prominent 

 carina. The clypeus is deeply bilobed in front, the hinder 

 border separated from the epicraniuin by a somewhat indis- 

 tinct suture. Prothorax narrowed in front and much wider 

 behind. Caudal appendages each provided with a blunt 

 spine, which is thickened at the base and arises from the 

 dorsal surface. When full grown (Plate 4, Fig. 1) the 

 larva is very stout, and measures 32 mm. in length and 6 

 nini. in width. A detailed description of the full-grown 

 larva follows : 



The head is of medium size, slightly flattened and of the 

 same color as the body. Clypeus somewhat shield shaped. 

 A faint line separates the clypeus from the epicranium and 

 reaches to the base of the mandibles, but does not divide 

 the raised portions which bear the antennae. Front edge 



