No. 4.] GYPSY MOTH — APPENDIX. 425 



line. Tlie transverse row of small spots occurrino; on the 

 precedins: segments is here absent. 



After the last molt the larva feeds for about three weeks, 

 during which time it grows very rapidly. It then ceases 

 feeding, burrows a little distance below the surface of the 

 ground and makes a small chamljer. The body shortens 

 somewhat, and in less than a week pupation takes place, 

 and is accomplished in the same way as the molting in the 

 previous stages. In several instances the larvte have molted 

 three times before pupating. 



Pupa. — (Plate 5, Figs. 1, 3.) Eighteen mm. long, 6.4 

 mm. wide at the first abdominal segment. Oblong, some- 

 what elliptical and flattened. General color of the body 

 pale amber. Head medium, somewhat flattened in front 

 and strongly depressed beneath the thoracic segments. 

 Eyes prominent, seal brown in color. Antennae and mouth 

 parts free, translucent. Prothorax broader than long, con- 

 siderably narrowed behind ; meso-thorax emarginate in 

 front and two-thirds as long as the meta-thorax ; all sepa- 

 rated by well-defined sutures. Wing-covers translucent 

 and extending beyond the third abdominal segment. Ab- 

 dominal segments nine in number, the sides of the body 

 protruding beyond the dorsal portions. The lateral edges 

 of abdominal segments two to six are produced to a blunt 

 point, within which is a slight depression. Penultimate 

 segment slightly depressed ; last segment greatly depressed 

 beneath the body, and bearing on the posterior margin a pair 

 of small anal stylets. Each of the first five al)dominal seg- 

 ments bears a narrow brush of erect brown hairs, which ex- 

 tends two-thirds of the distance across the segment (not 

 shown in Fig. 1). The nine pairs of spiracles are light 

 chestnut brown, and are situated in the same relative posi- 

 tion as those of the larva ; they are larger, however, and 

 elliptical in outline, those on the meta-thorax being the 

 largest. Legs free, translucent and nearly surrounded by 

 the wing-covers. 



Unfortunately all the larvae reared to pupte died before 

 emerging, hence I am unable to give the length of the period 

 spent in this stage. 



