STRIPED PINE-BORING BEETLE. 95 



degree Gyllenlial, report regarding its occurrence in Birch and other 

 deciduous-leaved trees rests undoubtedly on confusion with the pre- 

 ceding kind " * [namely, Trypodendron quercus, Eichhoff, the Striped 

 Deciduous Tree-borer, E. A. 0.] . 



With regard to larval and pupal description, I copy that of Dr. 

 Taschenberg : — 



" The larva is white ; the place of the claw-feet being taken by six 

 short conical lumps. The brown head is furnished with strong 

 mandibles. As long as the larva lies in its nest, rolled together with 

 the head near the tail, the lower part is pressed smooth, and the back 

 arched. . . . Half of May and June, afterwards half of August, 

 September, in wood. 



" The pupa is white, slightly shining on the thorax, otherwise dull, 

 and on both sides of the body set with 4-5 hook-like teeth directed 

 backwards and inwardly, the foremost of these being the smallest. 

 Length of the body 3*5 millimetres. They remain on an average 

 fourteen days in their cradles, with the head turned towards the 

 mother-gallery." i 



So very little detail (as far as I am aware) has been recorded from 

 original observation of the life-history in Britain of this and the allied 

 species, T. domesticum, that I have thought it best to extract some of 

 the chief points from the enormously elaborate papers of Herr Eichhoff 

 and Dr. Taschenberg, hoping that the infestation being thus brought 

 forward may lead to further investigation. 



The method of infestation of this species to Pine timber (as given 

 by Prof. Fisher, p. 229 of work quoted, avte, p. 93) is stated to be for 

 the mother beetle to bore straight into the tree for a short distance, 

 and then to construct one or more brood galleries at the end of the 

 entrance tunnel, usually at right angles to this entrance burrow, and 

 always transversely to the long axis | In the floor and roof of these 

 galleries the mother beetle gnaws small cylindrical holes vertically 

 into the wood for the reception of the egg, and after oviposition she 

 blocks these holes with wood-dust, forming partitions between the 

 secondary and primary galleries. There are generally from thirty to 

 fifty eggs.— (W. R. F.) 



* ' Die Europaischen Borkenkafer,' von W. Eichhoff, p. 299. 



t The above description is taken from the elaborate account of this species 

 given by Dr. E. L. Taschenberg in ' Praktische Insektenkunde,' pt. ii. p. 234, under 

 the synonym of Xyloteres lineatus, 01. 



\ These burrows I have not had the opportunity of examining in Pine timber, 

 but, judging by comparison of figures and descriptions, they may be generally 

 described as somewhat in shape like a capital Y or T laid horizontally, the stem of 

 the letter representing the perforation of the mother-gallery made from the outside 

 of the tree, and the arms, one of which is often missing, or very variously twisted 

 or modified, representing the brood galleries. — E. A. 0. 



