APPENDIX. 31 



and proportionately more elongated, than the T. latlusculus ; its pro- 

 thorax is more strictly conical, and rather less widened behind the 

 middle, being more straightened obliquely, or less rounded, at the 

 sides ; its elytra are more gradually, and straighily, attenuated (or 

 lengthened) posteriorly, where also they are usually somewhat more 

 diluted and rufescent, or less black ; its entire punctation is a trifle 

 finer; and its frontal costae are less abbreviated behind, though 

 scarcely continued to the anterior edge of the pronotum. 



The above diagnosis is drawn out from Gomeran examples ; and I 

 should add that a. Palman one now before me is a little smaller, 

 browner, and more oval, and has the ridges of its forehead somewhat 

 more produced posteriorly. Whether those from Teneriffe accord 

 best with the Palman or the Gomeran forms I am not able to say, 

 for I have at present no Teneriffan individual for comparison ; but 

 the question is not a very important one, for I do not think that 

 such minute differences can indicate more, at the utmost, than slight 

 insular phases of a single species. 



The T. elongatulus is very closely allied to the Hadeiran T. integer, 

 of which I am far from certain that it is more than a geographical 

 modification, and with which indeed in my late Canarian Catalogue 

 I actually identified it. I think however it will be more prudent to 

 keep it separate, the fact of its frontal keels being less decidedly 

 lengthened behind, in conjunction with its prothorax being a little 

 more sparingly punctured, more convex on the disk, and more im- 

 pressed at the base, and its elytral striaB being coarser, rendering it 

 probable (when its different habitat is taken into account) that it 

 may perhaps be specifically distinct. Nevertheless if it should prove 

 ultimately to be a mere variety of the T. integer, of course the latter 

 name will have to be adopted. 



Throscus integer. 



T. elongate affinis, sed magis brunneus; costis frontalibus postice 

 minus evanescentibus (usque ad marginem pronoti anticum ductis) ; 

 prothorace subdensius punctate, in disco vix minus convexo et 

 basi paulo levius impresso ; elytrorum striis sensim levioribus. 

 Long. corp. lin. 1-1|. 



Trixagus integer, Woll, Cat. Mad. Col. 82 (1857). 

 Habitat Maderam sylvaticam, in humidis subeditioribus rarissimus. 



Found in the damp laurel-woods of Madeira proper, at a rather 

 high altitude, where it would appear to be extremely rare. As 

 already stated, it is very closely allied to the T. elongatulus of the 



