324 



FAMILY CERAMBYCIDAE 



the night of 14-15 May and the igth of the month, or 6,000 eggs on 

 a 55-ft. bole. 



Xiunber of Beetles Laying in Trees. — -Eggs were laid subsequently to this 

 date. From this tree, which was felled on the 14th, 54 beetles were taken 

 on the 15th and 40 beetles on the 19th. 



Mr. Rama Nath Mukerjee kindly carried on these observations until 

 17 July, and submitted the following interesting note : — 



PERIOD AT WHICH BEETLES BEGIN TO DISAPPEAR FROM FOREST. 



Result of inspectioJi of sal-trees felled for the purpose of deter7n2ning at what periods of 

 the year the longicorn beetles are to be found on tlie ivitig. 



Sal-tree No. 3. — Green, blown down by storm on 29 May 1906. Girth, 5 ft. 4 in. Length, 

 50 ft. Forked at a height of 21 ft. ; stem full of knots, all the roots (except few small side ones) 

 were found to ha\e been attacked by fungi. There was no other external sign of disease. 



30 May 1906. Beetles found . . . . . 



Some eggs were found on the stem. 



31 ,, ,, Beetles found .... 

 I June „ „„.... 



3 M 



4 „ , 



606 



The eggs collected on 30 May 1906 were 



found to have hatched in the tube. 

 Beetles found ...... 



Total beetles found on tree No. 3 



Sal-tree No. 4. — Green, felled 8 June 1906. Girth, 4 ft. 3 in. Length, 61 ft. 



9 June 1906. Beetles found ........ 228 



24 

 9 



261 



10 

 13 



Total 



Sal-tree No. 5. — Green, felled 20 June 1906. Girth, 4 ft. 5 in. Lei 



21 June 1906. Beetles found , 



22 ,, ,, ,, ,, 



"3 ?) )) )> 51 



26 „ „ „ „ 



9j»iy „ 



Total 



Sal-tree No, 6. — Green, felled 8 July 1906. Girth, 4 ft. 3 in. Len: 

 9 July 1906. No beetles were found. 



"-' »' )) ?) ?> ?) )) 



'^ )i )> J) 5) ); )7 



17 „ „ Beetles found ...... 



;th, 61 ft. 



128 



47 

 21 

 20 



9 

 8 



233 



th, 72 ft, 



In November 1905 Ranger Rakhal Das Chakravarti reported that he 

 had discovered longicorn grubs tunnelling into living sal-trees, "trees of 

 5 ft. in girth having completely succumbed on account of their attack." 

 These grubs were collected on 6 November, A fortnight later the ranger 



