146 FAMILY BOSTRYCHIDAE 



Beetle. $ The front is finely and densely pubescent in the centre, 

 and not gibbous ; prothorax smaller than in , nearly square or rounded ; 



dorsal punctures of elytra well marked, becoming 

 Description. elongate near suture, and slightly denser on 



apical declivity. 



$ Three kinds of g are found : 



I. Normal heteromorphous <J, anterior angles of prothorax pro- 

 longed into horns which are curved downwards and have a glabrous outer 

 surface ; apical declivity of elytra with four marginal costiform callosities. 

 93- 2. A (J having a mixture of the female and male characters. The 



Bostrychopsis prothorax is without horns, the latter being replaced by two teeth ; the 

 fiarallela, Lesne. d without marg j na i callosities. 

 Central Provinces. . 



3. The horns ot prothorax are replaced by teeth, of which the inner 



one is often absent ; the marginal callosities are present, more or less prominent. 



Size of insect is variable, the length being from 6mm. to 15 mm. Specimens from Raipur 

 measured 9. 13 mm. 



Specimens of this insect were sent to me in 1901 by the late Mr. A. M. 

 Long, of the Indian Forest Service. He found them 



Life History. tunnelling into dead stacked bamboos (D. str ictus), in 

 the middle of June, in the Raipur forests. The beetles 



were taken from the interior wood-tissue, where the insect appeared to be 

 engaged in egg-laying. 



I have since taken the insect both in the Central Provinces and in 

 Bengal. The eggs are laid in the wood-tissue of the bamboo, and the grubs, 

 on hatching, feed on this wood, eating out irregular galleries which more or 

 less coalesce. On maturing, the beetles leave the bamboo generally by one 

 orifice, either the entrance-hole of the female beetle or one eaten out by the 

 first beetle to mature. 



Whilst acting as Superintendent of the Indian Museum in Calcutta, in 

 1903, a live specimen of a male was brought to me, taken in one of the 

 streets in the middle of May. 



The beetle often infests bamboos in the thatched roofs of bungalows, in 

 company with the species of Dinoderus already described. 



HETEROBOSTRYCHUS. 



Articulations of antennal club without well-defined velvety patches. 

 Prothorax narrower in front, slightly hollowed out medianly near anterior 

 edge. The beetles tunnel into the timber of fallen and felled trees, and also 

 into converted timber. 



Heterobostrychus unicornis, Waterhouse. 



REFERENCES. Waterhouse, Bostrychus unicornis, Ann. Mag. Nat. Hist, sth ser. iii, p. 361 (1879); 

 Fairmaire, Ann. Belg.p. 539(1893); Lesne, Ann. Soc. Ent. Fr. p. 558 (i? 



Habitat. Goalpara, Assam. Also reported from Kanara (T. R. D. Bell), 

 Calcutta, Madras, Rangoon, Andaman Islands. 



Tree Attacked. ? Sal (Shorea robusta) or Bamboo (D en dro calamus 

 str ictus). Kachugaon, Goalpara. 



