FAMILY BOSTRYCHIDAE 



169 



they first appear in March, or even Feb- 

 ruary, if the specimens sent by Mr. Glea- 

 dow to the Indian Museum were obtained 

 during that month. In Chota Nagpur I 

 have taken them early in March, and they 

 probably appear in February, as this is 

 certainly the case in the Central Provinces. 

 At Katha, in Upper Burma, I found the 

 insect infesting a bamboo on 20 Feb- 

 ruary 1905, whilst what was probably the 

 second generation of the year was taken 

 in "jungle-wood" firewood billets on the 

 launch Katinka, as we were running up 

 the Ataran River, on 15 March 1905. The 

 billets were used as fuel for the launch. 



In Tenasserim, therefore, the beetle 

 will have completed a generation and a 

 half before the species commences to lay 

 the first eggs of the year in North India. 

 Regarding the period of rest during the 

 winter months, data for the various parts 

 of the country are still required. Accord- 

 ing to Mr. B. O. Coventry, the last gene- 

 ration of the year appears at Changa 

 Manga in September and October. This 

 observer says that the beetles appear in 

 September and oviposit, disappearing in 

 October. This would seem to show that 

 in the Punjab a portion of this generation 

 passes through the winter in the larval, 

 pupal, or semi-mature imago stage. In 

 DehraDun, however, I bred out beetles in 

 the third week of November from sissu bil- 

 lets brought with me from Changa Manga ; 

 so that a portion, at least, of the Sep- 

 tember-laid eggs mature, and hibernate as 

 beetles. I discovered at Changa Manga 

 that these beetles hibernate in the thicker 

 bark of old dying or dead sissu standards. 

 Trees examined were pitted with holes 

 which did not extend down into the sap- 

 wood, and had been made only to form a 

 resting-place for the beetle during the 

 winter. As regards the number of gene- 

 rations passed through during the year, 



Fig. 115. — Exit and entrance holes 

 of Sinoxylon crassitm and S. anale 

 in a stem of Dalbergia sissoo. 

 Changa Manga Plantation, Punjab. 



