CANAEIAN COLEOPTEEA. 97 



thickened at the extremity, and with their eighth joint (or the fourth 

 from the apex) greatly elongcded and triangular, for their prothorax 

 being- much developed, rounded and broadly compressed at the sides, 

 very uneven on the disc and more or less scooped-out in front, and 

 for their elytra being very widely margined, especially behind. I have 

 not, however, dissected them, to ascertain whether they possess any 

 differential characters in their oral organs, to correspond with these 

 external (but nevertheless' purely structural) ones. 



158. Silpha simplicicornis. 



S. oblonga, nigra, subnitida ; prothorace in disco vix sed versus la- 

 tera leviter punctulato, apice sat profunde emarginato, ad latera 

 valde explanato-rotundato, postice in disco obsoletissime et obtuse 

 longitudinaliter 4-subcostato ; elytris leviter subasperato-pxmctu- 

 latis, utroque 3-costato ; antennis valde elongatis, fuscescentibus. 



Feem. vixopacior, elytrorum costa exteriore (prsesertim ante apicem) 

 magis elevata. — Long. corp. lin. 7-9. 



Silpha simplicicornis, Bridle, in Webb et Berth. (Col.) 59. pi. ii. f. 10 

 [script, tenuicorms*'] (1838). 



Habitat in sylvaticis Tcneriffa), hinc inde baud infrequens. 



The larger size of this noble Silpha, in conjunction with its more 

 shining and much more lightly punctured surface, its more uneven 

 and laterally developed prothorax (on which the longitudinal costae 

 are very obtuse and almost obsolete), the much less elevated ridges of 

 its elytra, and its rather longer limbs, will readily separate it from 

 the following species. It appears to be the commoner of the two, — 

 though, at the same time, exceedingly local and confined to certain 

 spots within the sylvan districts of Teneriffe. I have taken it in the 

 laurel- woods on the mountains above Taganana, as also at Las Mer- 

 cedes and (more particularly) at the Agua Garcia. It has likewise 

 been commimicated by the BariTO do Castello de Paiva ; and I possess 

 specimens, given me by Dr. Heer, which were collected by M. Hartung. 



159. Silpha figurata. 

 S. oblonga, nigra, subopaca ; prothorace profunde punctate, apice 



* It is much to be regretted that M. Brulle should not have made up his mind 

 as to the names of his species before his Plates were engraved ; for, as it is, these 

 two Tencriffan Silphas stand in his work under no less than four separate titles ! 

 The present species is called siirqjlicicor^iis in his letter-press, and tenuicornis on 

 his Plate ; whilst the following one is described as the figurata, but is figured 

 under the title of costafa ! Indeed, from the excessive badness of his figures, 

 and the fact that they are not even referred to at all in the text (as is the case with 

 the whole 29 species which he has illustrated !), it really becomes difficult to tell, 

 from this non-agreement of the names in the letter-press and Plate, which iigiu'e 

 and which diagnosis are intended to correspond. 



