6o8 



FAMILY SCOLYTIDAE 



$ Head concave on front, with two long brushes of reddish hair over eyes curling 

 down on to front. Prothorax wider than long, base straight, sides much rounded, the anterior 

 margin emarginate, the surface covered with a few sparse hairs. Elytra with sides slightly 

 rounded to near apex, thence constricted slightly, the apex bluntly obtuse ; surface somewhat 

 flattened basally, moderately shining, the apical third dark brown, the colour gradually 

 darkening to apex ; the diskal striae feeble but visible from base, absent on lateral areas, 

 more prominent on apical declivity, the surface of which is rougher, the intervals rugose and 

 tuberculate ; the pubescence fairly dense on declivity. 



9 Head without central brush of hair on front, with a longitudinal rather feeble median 

 line, convex, with scattered fine punctures becoming larger on vertex, the surface between 

 very finely reticulate. Prothorax with anterior margin nearly straight, base slightly bisinuate, 

 sides rounded anteriorly, produced into a blunt point medianly, thence emarginate, the 

 posterior outer angles bluntly obtuse ; the diskal pore elliptical in shape, filled with a dense 

 yellow pubescence. Elytral striae very feeble, the suture brown throughout, the rest of 

 colouring darker than in $ : the striae and rugosities on declivity not so prominent as 

 in $ and the pubescence less dense. Length, $ 2.8 mm., 3- 1 mm - 



This beetle was first discovered in 1903, tunnelling into the timber of 



oak-wood in Darjeeling, by Mr. B. B. Osmaston, in 



Life History. charge at the time of the Darjeeling forests. The beetle 



was cut out of the galleries in the wood of the tree, but 



no further information on its life history was obtainable. 



UNDETERMINED SCOLYTIDAE. 

 Hylesinus ? or Dryocoetes ? sp. 

 Habitat. Siwaliks, North India. 

 Tree Attacked. Ssindan(0iigeiniadalbergioides). Sabbhawala, Siwaliks. 



Beetle.- I have taken only immature dead specimens in tunnels in the wood of the tree. 

 These were light yellowish brown to dark brown, but dried up and undeterminable. 



Towards the end of April I obtained a number of dead beetles 

 from the inner bark and sapwood of a dead Ougeinia 



Life History. dalbergioides. The female tunnels 

 through the bark of the tree to 



oviposit. On reaching the sapwood she eats out in 

 this and the bast a transverse gallery, i.e. at right 

 angles to the long axis of the tree, laying her eggs on 

 either side. On hatching, the grubs eat out galleries 

 at right angles to the female tunnel, the larval 

 galleries keeping a straight course with but little 

 serpentining. All the galleries groove deeply into the 

 sapwood. 



Observations seemed to indicate that the beetles 

 oviposit in trees which have died and lost a portion 



f . * * A 



FIG. 387. Egg and 

 larval galleries of Hyle- 



r sinus ? or Dryocoetes ? 



of their sap, but further investigation is required to !? n the sapwood of 

 substantiate this point. Ougeinia dalbergioides. 



Siwaliks. (E. P. S.) 



