336 



The Botanical Gazette. 



[December, 



has not been determined. Growth, however, is very slow, 

 and the period from the egg to the full larval growth is var- 

 iable. The larval life extends in some cases certainly over a 

 period of three months. When full grown the larvae attain a 

 length, extended, of 8 mm.; contracted when disturbed or at 

 rest of 5 to 6 mm. Whenever disturbed they contract con- 

 siderably and become rigid and motionlesa. The larva is 

 shown in characteristic positions in the accompanying illus- 

 tration (fig. i, a, b). It is dull grayish in color, varying con- 

 siderably in different specimens. On reaching full growth the 

 larva constructs a cocoon of loose white silk, forming an irreg- 

 ular open network as shown in fig. 2, b. The cocoon is usually 

 placed in a fold of the leaf or is otherwise protected by the 

 plant, and is occasionally partly covered with bits of anthers 

 or fragments of leaves. In shape it is irregularly ovoid and 

 is about 6 mm. by 3.5 mm. The change to pupa takes place 



about three days after the co- 

 coon is completed and the moth 

 usually appears eighteen to 

 twenty days after pupation. 

 The pupa is 5 mm. in length, 

 somewhat robust, and is slight 



Fig. 2. Carphoxna ptelearia; a> larva; 



b, cocoon; c, moth; d t egg — 'all en- 

 larged. (Original.) 



ly yellowish in color, with su- 

 tures and tip brownish, the 

 latter being quite dark. A pe- 

 culiar pad or flap-like projec- 

 tion occurs on the side of the 

 fifth abdominal joint (fig. I« 

 e y g). The cremaster is pro- 

 duced, notched at the tip and 

 armed with six long hooked 

 hairs or spines (fig. I, /). The 

 adult insect is about 5 mm. 

 long and expands from 13 to 

 14 mm. The general color is 

 greyish-yellow inclining to saf- 

 fron, the primaries being some- 

 what darker. The wincrs are 



marked (fig. 2, c) with transverse bands of dusky shade, and 

 each wing has a discal spot. The head is dark brown, with 

 the antennae, including a large spot on the vertex, yellowish. 

 1 he under surface is nearly concolorous, the dark bands being 



