36 



C. SASAKI. 



After the second «tage there are no marked changes in hut h color and 

 markings till the larva becomes mature. 



The mature larva is long cylindrical and 51 nun. in length. The head is 

 comparatively small, somewhat depressed, and light greenish yellow in color. 

 r l he body is light greenish brown in color, hut it looks somewhat dusky, since it is 

 provided with several markings of different kinds, sizes, and colorations (tig. 4). 



The principal markings of the body are: — the first body segment deep 

 greenish yellow in its posterior half, the 2nd hears dorsally a large central green- 

 ish yellow, and two smaller lateral blackish, patches. The front and lateral sides 

 of the central patch are tinged black.' Tht boundary lines between the central 

 and the two lateral patches as well as the posterior edges of the same segment 

 are tinged crimson red. The 3rd and 4th segments deep greyish brown, and the 

 former is provided with a few de p folds. The body segments from 5th to 10th 

 hear each a * shaped deep greyish markings, which are either somewhat distinct 

 or obscure. 



The 5th and 8th body segments bear dorsally a pair of oval patches of a 

 light dull brownish color. Each of the patches on the 5th segment (lig. 4, a) 

 is bordered with an imperfect blackish ring. In the centre of the patch lies a 

 black dot, while the rest of the patch which occupies the larger portion of it, 

 is marked with a few dull purplish elongated areas. The portion of the patch, 

 where the purplish long pieces are wanting, is usually provided with a variable 

 number of white dots. The patch of the 8th segment has a small central dull 

 purplish dot, and the remaining portions are occupied with 3 or 4 short rod-like 

 markings of the same color (fig. 4,h). 



The cocoon is elongated oval or rather spindle shaped in form, and of a 

 light yellowish color. The length is about 30 mm. and the breadth 12 mm. 



It is usually enclosed in a leaf of the mulberry tree, and hangs on the twigs. 

 The pupa is cylindrical, dark brown, about 20 mm. in length. 



The adult of the domestic silkworm (Bombyx mori.) is mostly white, and 

 larger than that of the wild silkworm. The fore wing is also white; hut just . 

 below its apex there lies a slight indentation exactly similar to the one found 

 on the fore wing of the wild silkworm moth. The ante- and postmedian hands as 

 well as the discocellular mark, are, in certain individuals, distinctly seen; but 

 a blackish brown patch bordering the indentation below the apex is entirely 



