APPENDIX. 



so, since the development of these small prothoracic excrescence 

 eminently variable in all the species which possess them *. 



Aphanarthrum pygmseum, n. sp. 



A. minutissimum, nigrum (vel fusco-nigrum), subopacum, pilis bre- 

 vibus subdemissis subalbido-cinereis parce vestitum ; prothorace 

 basi latiusculo, apice attenuate acutiusculo et ibidem ssepius ferru- 

 gineo ac plus minus evidenter subrecurve biplicato-incrassato (vix 

 bituberculato), alutaceo et levissime parceque punctulato necnon 

 antice sat grosse marginato ; elytris subseriatim punctatis et grosse 

 transversim rugulosis, sa3pius vix dilutioribus (i. e. fasciis obsoletis, 

 omnino suffusis) sed interdum obscure brunneo-ochreis in limbo 

 fasciaque media dentata suffuse nigrescentibus. Long. corp. lin. |. 



Var. ft. laticollis. Vix major, prothorace basi paulo latiore, apicem 

 versus vix minus grosse asperato, ad apicem ipsissimum subdistinc- 

 tius biplicato. [Ins. Palma.~] 



Habitat Teneriffam et Gomeram, in caulibus Eupliortice canariensis 

 putridis a DD. Crotch repertum. Var. ft, a meipso capta, ad 

 ins. Palmam pertinet. 



The most minute of all the ApTianarihra hitherto detected, and 

 one which was captured during the summer of 1864 by the Messrs. 

 Crotch (within the rotten stalks of the Euphorbia canariensis} both 

 in Teneriffe and Gomera. I had however myself previously taken 

 a single example in the island of Palma, which I think does not 

 differ sufficiently from those of the Messrs. Crotch to be regarded as 

 more than a slight insular modification of the same species, though, 

 on account of its being immature, and from want of material for 

 compiling a satisfactory diagnosis, I thought it safer to ignore it 

 altogether in my Canarian Catalogue. 



In its general colour and rather short subdecumbent pubescence, 

 as well as in its prothorax being usually ferruginous at the apex 

 (where it has a tendency, more or less expressed in different indivi- 

 duals, to be somewhat subrecurved and minutely incrassated, though 

 scarcely tuberculated, into a sort of bipartite plait), the A. pygmceum 



* Considering how liable these prothoracic tubercles are to be -more or less 

 developed in unquestionably the same species, it is barely possible that the two 

 immature examples (from Lanzarote) which in my Canarian Catalogue I described 

 under the name of A. armatum may represent some insular state of the canescens 

 in which those minute processes are much more apparent than is the case even 

 in the Gomeran individuals ; for the great enlargement of their ely tral fascia?, 

 which are so nearly suffused over the entire surface that there is merely a paler 

 region behind the base, is quite in accordance with some of the darker specimens 

 of the canescens. Nevertheless, until further material has been obtained from 

 Lanzarote, it certainly would be most unsafe to regard the armatum (which has 

 several small characteristics of its own) as anything but truly distinct. 



