APPENDIX. 43 



has more in common with the canariense than with any of the other 

 species; nevertheless it is scarcely more than a third the size of 

 that insect, its prothorax is relatively a little wider at the base, and 

 its elytra are much obscurer in hue (being often almost black), and 

 even in paler specimens seem to have their hinder fascia obsolete, 

 being, however, gradually (though indistinctly) darkened, or clouded, 

 towards the lateral margins. 



Aphanarthrum bicinctum. 



A. nigrum, pilis erectis longiusculis cinereis vestitum; prothorace 

 alutaceo et dense punctato, apice fere simplici (plus minus minu- 

 tissime bituberculato) ; elytris subseriatim punctatis ac transversim 

 rugulosis, plus minus brunneo-ochreis (rarius testaceo-ochreis), 

 fasciis duabus nigris (una sc. magna dentata et altera subpostica) 

 ornatis ; antennis pedibusque piceo-testaceis. Long. corp. lin. |-1. 



a. Minus, subnitidum; prothorace ad apicem ipsissimum ssepius 

 anguste ferrugineo ; elytris Ia3te ochreis, fasciis plerumque angustis 

 et argute determinatis. [Ins. Lanzarota et Fuerteventura.'] 



/3. obsitum. Paulo major ; prothorace vix longiore, ad apicem saBpius 

 concolori et paulo evidentius tuberculato ; elytris plus minus brun- 

 neo-ochreis, fasciis plerumque majoribus. [Ins. Canaria Grandis.~] 



y. vestitum. Paulo major quam status /3, sublatius, subopacius ac 

 sensim densius pubescens ; elytris brunneo-ochreis, fasciis ple- 

 rumque magnis sufFusis ; et colore omnino obscuriore. [Ins. Tene- 

 rijfa.] 



Aphanarthrum bicinctum, Wott., Ann. Nat. Hist. v. 165 (1860). 

 , Id., Cat. Can. Col. 260 (1864). 



Habitat in Lanzarota, Fuerteventura, Canaria et Teneriffa, Euphorbias 

 emortuas destruens. 



I have given a corrected diagnosis of this Aphanarthrum, inasmuch 

 as the more extensive material (collected principally by the Messrs. 

 Crotch) which I have lately inspected would seem to imply that there 

 are at least three (if not more) tolerably appreciable phases of it, or 

 insular modifications. The state " a " (from Lanzarote and Fuerte- 

 ventura) might well be supposed at first sight to be specifically dis- 

 tinct from (at all events extreme examples of) the state " y " (from 

 Teneriffe) ; but when the two are carefully inspected with the aid of 

 the"/3"(fr m Grand Canary), the case is completely altered, and I am 

 satisfied that they are all mere forms of a single rather plastic species. 



Genus LIPARTHBUM. 

 Wollaston, Ins. Mad. 294 (1854). 



