Mr. T. V. Wollaston on the Cohoptera of St. Helena. 321 



32. Tomicus cemulus, n. sp. 



T. cyliiidricus, nitidus, nigro-piceus, pilisque longiusculis suberectis 

 fulvescentibus parce obsitus ; prothorace amplo, subalutaceo, pos- 

 tice evidenter punctulato, mox ante medium subnodoso-convexo, 

 antice dilatato obtuse rotundato necnon mucronibus asperato ; 

 elytris leviter striato-punetatis punctulisque minoribus iii inter- 

 stitiis uniseriatim notatis, ad apicem retiisis, parte perpendicular! 

 dentibus sublateraKbus duobus subsequalibus (sc, superiore et in- 

 feriore) ac perpaucis lateralibus minutissimis granuliformibus 

 utrinque armata ; antennis pedibusque testaceo-ferrugineis. 



Long. Corp. lin. 1^. 



The single specimen from which the above diagnosis has 

 been drawn out, and which was cajDtured at St. Helena by- 

 Mr. Melliss, has much the general appearance, at first sight, of 

 the European T. saxeseni (which occurs likewise in the Azo- 

 rean, Madeiran, and Canarian archipelagos) ; but a closer in- 

 spection will show not only that it is a little larger and more 

 pilose, with its prothorax less alutaceous and more distinctly 

 punctulated behind, but tliat its elytra are more retuse (or perpen- 

 dicularly truncated) at the apex, and that each of them is armed 

 with (in addition to smaller and granuliform ones) two robust 

 acute spines. This latter character, apart from its less shining 

 and more evidently punctulated prothorax and darker hue, 

 will equally separate it from the T. perforans^ a species closely 

 resembling the saxeseni^ and which has been found in the 

 Madeiran and Cape -Verde archipelagos (where, however, in 

 all probability it has become natm'alized accidentally through 

 human agencies). What the exact habit of the St.-Helena 

 species may be, I cannot tell ; but, if found in the higher dis- 

 tricts of the island, at a distance from the towns, it is of course 

 possible (though I should scarcely think likely) that it may be 

 truly indigenous. 



Fam. 17. HylesinidaB. 



Genus 26. Hyluegus. 



Latreille, Gen. Crust, et Ins. ii. 274 (1807). 



33. Hylurgus ligniperda^ . 



Bostrichus ligniperda, Fab., Ent. Syst. i. ii. 367 (1792). 

 Hyhirgus ligniperda, Well., Col. Atl. 250 (1865). 



As in the Azorean, Madeiran, and Canarian groups, the 

 European H. ligniperda appears (judging from examples of it 

 which were captured by Mr. Melliss) to have become natu- 

 ralized at St. Helena ; but as it is an insect which is eminently 

 liable to accidental transmission along with trees of the pine 

 family, its presence in even so remote an island may perhaps 

 be accounted for. 



[To be continued.] 



