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beetles do not emerge till spring. They are the last of the genus to 

 appear, coming out towards the end of June, whilst S. destructor has 

 been out for several weeks. This species is by no means hardy, for 

 a large proportion of the broods die ; but it is not so delicate as S. 

 rnultistriatus. 



5. Scolttus bug-ulosus, Batz. Though hitherto accounted 

 rather rare, this species must always be, however, more common than 

 S. pruni, because it is much hardier ; whilst S. pruni prefers large 

 trunks, not entering wood smaller than three inches in diameter, S. 

 rugulosus burrows in all, even in branches which are mere twigs, and 

 so finds abundant pabulum, where the other insect would starve. I 

 have never detected S. rugulosus in the living tree, and do not believe 

 that either it or S. pruni is injurious to orchards. It comes out about 

 a week before 8. pruni, but is later than the other species of the genus. 



This insect is notable amongst the Hylesinidce for not hiding the 

 entrance of the gallery of oviposition; in a stick infested by it the 

 openings of these may be readily seen, whereas usually they are well 

 hidden in some crevice of the bark, as for example is the case with S. 

 destructor and rnultistriatus, in neither of which can the opening be 

 detected, except during its formation, and then by the frass lying at 

 its entrance. This partly depends on the fruit trees attacked often 

 having very smooth bark. 



The gallery is longitudinal and rather more than an inch in length, 

 and is lined all round with white frass from the wood, on which the 

 burrow slightly encroaches, and not with frass from the bark, as in the 

 other species, making the gallery when opened very conspicuous against 

 the dark coloured bark beside it. The eggs are laid on either side, 

 behind the frass ; their numbers seldom reach 80. When not crowded 

 together the larvse make a tolerably regular " typograph," and burrow 

 into the wood to hybernate, sometimes to a depth of nearly half-an-inch. 



When the bark is thick, they sometimes, like S. destructor, hyber- 

 nate in its thickness. 



6 Scolvtus intricatus, Batz. This species, according to my 

 experience, is, after S. destructor, the most common species, and cannot 

 be considered scarce. It seems, also, to be not so closely allied to the 

 other species as they are to each other, having more rounded outline, 

 and less of the typical quaint truncated form. It feeds on oak, and 

 differs from the other species in habit, by making a transverse instead 

 of a longitudinal gallery of oviposition, which, in comparison with the 



