FAMILY SCOLYTIDAE 



eggs being laid at the end of the tunnel. At the end of the first week in 

 March I took mature and maturing beetles at the bottom of the egg- 

 galleries. Some appeared to have already left the tree, crawling up the 

 egg-gallery made by their mother to escape. 



Subsequently a generation of the beetles was found just maturing and 

 leaving a tree, on n March 1905. The beetle apparently chooses the 

 hardest portions of the timber to tunnel into for ovipositing purposes. 

 The insects taken were maturing in tunnels driven into the hard wood of 

 a green stump of a teak in the Shwegun plantation, and the egg-tunnels 

 went alike through hard knots as through the knotless parts. 



In the case examined the teak-stump was riddled with holes, and the 

 numerous tunnels cut into contained for the most part quite mature or 

 maturing beetles, the latter still light yellowish-brown in colour. 



This small Xylchonix is of importance owing to the readiness with 

 which it tunnels into the hardest teak timber and 



thus ruins its commercial value - The life history and 

 abundance of the beetle requires careful attention on 

 the part of Forest Officers in Burma. 



Xyleborus noxius, Sampson, sp. nov. 



REFERENCE. Sampson, Ann. Mag. Nat. Hist. ser. 8, vol. xii, p. 445 (1913). 



Habitat. South Malabar ; Salween River, Tenasserim. 



Trees Attacked. Teak (Tcctona grandis): Nilumbur Teak Plantation, 

 South Malabar; Yindiak (Dalbergia cnUrata}: Kowloon Island, Salween 

 River; Pyinkadu (Xylia dolabriformis) : Kamamaung, Salween River. 



Beetle. Elongate, cylindrical. Piceous brown ; prothorax darker, almost black anteriorly. 

 Head punctate, antennae yellowish brown, club yellow. Prothorax longer than wide, base 



straight, basal angles oblique, sides slightly rounded, apex strongly 



Description. so ; with prominent transverse asperities covering more than 



anterior two-thirds of the surface, decreasing in size to highest point 



of disk and extending laterally to base ; rest smooth, shining, very finely longitudinally 



FIG. 378. 



Xyleborus noxius, 



Samps., sp. nov., in Dal- 



bcrgia ciiltrata. Salween 



River, Tenasserim. 



FIG. 379. 



Xyleborus no.rius, 



Samps., in pyinkadu. 



Tenasserim. 



FIG. 380. 



Xvlcborus 

 Samps., in teak. 

 Nilumbur, South 

 Malabar. 



Scutellum round, large, smooth. Elytra about as wide as thorax at base, not half 

 again ; punctate, the punctures circular, shallow, rather large, the interspaces smooth, 



