84^ Indian Museum Notes, [Vol. VI. 



running almost to centre of wing, and one running from centre of 

 lower margin to beyond the centre of the wing. This latter streak 

 is more or less triangular in shape. The hind wings have a broad 

 central white streak almost connecting costa to lower margin. Legs 

 white speckled with black. 



This insect was sent from the Cawnpore Farm where it was caught 

 on the wing in the cotton fields at the beginning of September 1902. 

 It is not as yet known whether its larva feeds upon the cotton plant. 



In the case of both of the above insects we require to know 

 where the caterpillar lives, upon what it feeds, and how long it spends 

 in this stage. How long is spent in the chrysalis stage. How long 

 is spent in the adult or moth stage ; where the eggs are laid and how 

 many generations the insect passes through in the year. 



VII.-— Insects Affecting Tea. 

 Thosea cana. 



Order, Lepidoptera. Sub-Order, Heterocera. Family, Limacodidce. 

 Previous reference* — I. M, Notes, Vol. V. No, 3, p. 136 (larva and pupa). 



Moth,'— Colour greyish brown. Forewings with a dark oblique 

 line with light outer edge near centre of wing. Hind wing slightly 

 browner. 



Larva.— -Green ; a yellowish white stripe down back and rows of 

 tubercles on it. 



The caterpillars of this insect made their appearance on the 

 Udaleah Tea Estate in the Chittagong district in the middle of Novem- 

 ber 1902 and committed considerable havoc by defoliating the tea 

 bushes. Specimens of the moth were reared by Mr. Mann in 

 Calcutta and the insect was identified from them. 



These caterpillars have previously been reported as appearing in 

 the months of January. 



Mr. Burnell, the Manager of the Udaleah Tea Estate, wrote as 



follows with reference to the attack at present under notice: (( I 



am sending you by dak bangi a small bottle containing specimens of 

 a hairy caterpillar which has made its appearance at Kolapania, and is 

 doing havoc amongst the tea plants. I have never known its preva- 

 lence in other years, and it has appeared in large numbers, and no 

 less than 50,000 have been collected during the last three days and 

 destroyed by fire. I should like these caterpillars sent to the Indian 

 Museum and have a report thereon, for I believe they are found on 

 Assam and Duara Gardens. ...... These caterpillars have also lately 



