(Plate 43). I have adopted Herbst^s name cylhulrm after 

 Dejeaiij who has applied the name cylindncm to a North Ameri- 

 can species. — Before I proceed further I shall notice its pecidiari- 

 ties. Most insects that live under bark either have moderately 

 long or very short legs ; but in our insect the tarsi, which are 

 5 -jointed, are remarkable for their length, being twice as long as 

 the whole remainder of the leg ; the coxse of the anterior pair are 

 very powerful, and this pair has a singular appearance, being 

 bowed outward so as to form nearly a circle when viewed in 

 front ; the transverse furrows upon the tibiae of this pair are very 

 peculiar characters, and must materially assist the insect in its 

 course through its narrow labyrinths beneath the bark. 



It is to the assiduity of Mr. D. Bydder that we are enabled to 

 record it in our British Fauna : the specimens in my own as well 

 as all other cabinets, are from the large stock which he once took 

 in the New Forest under tlie bark of felled oak and beech trees 

 in the month of May. Although it must be upwards of twelve 

 years since that capture was made, and the insect has been sought 

 for since, I have never heard of a single specimen having been 

 taken. This, however, is only additional evidence to a well known 

 fact, that myriads of Xylophagous insects may be found in one 

 tree, whilst others close to the spot will be untouched, or affected 

 in so shght a degree as to prevent discovery. There is nothing 

 perhaps in nature more wonderful than the sudden appearance and 

 disappearance of these minor works of the Creator, which are at 

 His command called forth to answer ends that our limited under- 

 standings cannot comprehend, and which being accomplished are, 

 by a combination of circumstances no less wonderful, swept away 

 from us altogether for a season. 



All the trees of this country occasionally suffer, and some of 

 them materially, from the attacks of insects. As it therefore 

 becomes of great importance that we should be acquainted with 

 them, I shall, whenever I arrive at the illustration of such genera, 

 point out their peculiar habits. I regret that in the present 

 instance I can find no account, in any of the works with which I 

 am acquainted, of the economy of our insect ; and if it were 

 known, we no doubt should have been fully informed upon the 

 subject in the invaluable works of the learned Latreille. 



Geranium pratense (Meadow Crane's Bill) is figured in the 

 plate. 



