172 Mr. T. Vernon Wollaston on the Euphorbia-infestinrj 



Habitat in rami's truncisque Eupliorbiarum in ins. Hierro, 

 rarius. 



The almost total freedom from pile (except under a liigli mag- 

 nifying power) of this little jiphanarthrum, in conjunction with its 

 very lightly sculptured elytra (the punctures of which are but in- 

 distinctly disposed in rows), will, ifiter alia, separate it readily 

 from all of the preceding species. It appears to be rare, the only 

 specimens which I have yet seen having been captured by myself 

 in the island of Hierro. 



27. Ajihanarthrum pusillum,* WoU. 



A. minutum, nigro-fuscum pilis cinereis vestitum ; capite leviter 

 elongato, subporrecto ; prothorace angustulo subelliptico 

 punctato, antice leviter producto et subito contracto acumi- 

 nato ; elytris dense subseriatim punctatis, concoloribus, ad 

 humeros in tuberculum indistincte elevatis ; antennis pedi- 

 busque pallidioribus. 



Long. corp. lin. a — vix |. 



Aphanarthrum pusilluvi, Woll., Ann. of Nat. Hist. (Ser. 3), v. 



- 167 (1860). 



Habitat in ramis Euph. canariensis putridis, in ins. Canaria, 

 TenerifTa et Gomera, a meipso repertum. _ ■ 



The excessively minute size and uniformly dark-brown hue of 

 this little Aphanarlliruvi, in conjunction with its rather elongated 

 subporrected head and its somewhat elliptic, anteriorly contracted 

 prothorax, will at once distinguish it from any of the preceding 

 species. In my notes on the Aphanarthra, published in the 

 "Annals of Natural History" for last year, I stated that this 

 diminutive insect might perhaps constitute eventually the type of 

 a new genus ; but on mounting lately one of its antennae in bal- 

 sam for the microscope, it is constructed on the exact pattern 

 which obtains in the A. Jubce (namely, with certainly two funiculus- 

 joints, if indeed there be not in reality, as already intimated, an 

 infinitesimal third one, — such as seems to be faintly indicated in 

 the Madeiran A. Enphorbics) : so that there appears to be no suf- 

 ficient reason for separating it from the several preceding mem- 

 bers of the group. So far as I have observed hitherto, the A. 

 pusillum is peculiar to the Euph. canariensis, in the rotten stems of 

 which I have captured it (in the great crater of the Bandama) in 

 Grand Canary (on the mountains above Santa Cruz), in Teneriffe, 

 and (on a hill-summit to the north-west of San Sebastian) in 

 Gomera. 



