1 8 APPENDIX, 



A.D. 1864 repertus: necnon etiam in ins. Hierro specimen 

 unicum ceperunt. 



Obs. Species T. canariensi aliquo modo affinis, sed major, latior, 

 postice obtusior (i. e. magis truncate declivis) setisque longioribus 

 magis erectis fuscis pailidioribusque obsita ; prothorace ad latera 

 magis aequaliter rotundato (nee postice subito angustiore) ; ely- 

 trorum nodis mnlto minus exstantibus sed plerumque multo Isetius 

 rufescentibus, interstitiis alternis sensim latioribus. 



This fine Tarphius would appear to be the representative in Gomera 

 of the T. canariensis which occurs, under slightly altered phases, 

 in Grand Canary, Teneriffe, and Palma. For although I feel com- 

 pelled in my diagnosis of the latter to recognize for it a rather wide 

 range of variation, I nevertheless cannot myself believe that the 

 present one should be included amongst any of the insular modifica- 

 tions of that species. And yet I would not wish to imply positively 

 that such may not be the case, for it certainly does seem strange if 

 the almost universal T. canariensis should be absent from the laurel- 

 districts of Gomera; so that I should prefer to leave the question 

 an open one, that it may be solved by others (who may have occa- 

 sion to consider it) in accordance with their belief in the modifying 

 effects of surrounding circumstances on external insect form,. I 

 would however simply remark that the idea of its being any local 

 state of the T. canariensis appears to be negatived by the fact of its 

 existing likewise in Hierro, from which island a single specimen 

 was brought by the Messrs. Crotch, differing in no appreciable par- 

 ticular from the Gomeran ones. And moreover we can scarcely 

 yet pronounce for certain that the canariensis proper is not to be 

 met with (likewise) in some of the unexplored laurel-woods of 

 Gomera. 



Judging from an immense series now before me, collected by 

 Dr. Crotch and his brother in the laurel-districts above Hermigua in 

 Gomera, the T. setosus would seem to diifer from all the forms of the 

 canariensis in being on the average considerably larger and relatively 

 tooader (the subanal region being also more truncated, or obtuse), 

 in its setae being much longer and more erect (a portion of them 

 moreover being comparatively pale), in its prothorax being more 

 equally rounded at the sides (having scarcely any tendency to be 

 suddenly narrowed behind), and in its elytral nodules being much 

 less developed, though at the same time nearly always conspicuously 

 blotched (or rufescent). Although, like most of the Tarphii, very 

 variable in size, it is a remarkably constant species in all other 



