Mr. T. V. Wollaston on Additions to Madeiran Coleaptera. 363 



linea dorsali, utrinque plaga longitudinal!, macula transversa sub- ' 

 postica et linea transversa subantica (plus minus confluentibus 

 suffusis) nigris; elytris paulo nitidioribus subdiaphanis, remote 

 seriatim punctulatis (punctulis minutis), fasciis duabus profunde 

 dentatis nigris (una sc. magna in medio duplici et altera angus- 

 tiore subpostica) ornatis. 



Long. corp. lin. f1. 



Fariat lineis maculisque plus minus fractis, disjunctis, rarius sub- 

 obsoletis. 



Habitat in iisdem locis ac prsecedens, sed illo paulo rarius. 



Aphanarthrum bicolor,Wo\\., Ann. Nat. Hist. ser. 3. vol. v. p. 165. 



A. pale testaceous, and of a slightly more shining and sub- 

 diaphanous surface (at any rate, as regards the elytra) than either 

 of the other Madeiran Aphanarthra ; also very much less pilose, 

 there being only an extremely few (though rather long) suberect 

 hairs scattered over its surface. Prothorax rather more acumi- 

 nated anteriorly than that of the A. piscatorium, and also a little 

 thickened (or subtuberculose) at the extreme apical margin, 

 but neither so much acuminated nor so distinctly roughened as 

 in the A. Euphorbia; most closely and delicately alutaceous 

 (when viewed beneath the microscope), but with the additional 

 punctures, which are so numerous in the other species, exces- 

 sively minute and extremely remote ; with a transverse dash 

 behind and before, a longitudinal one (connecting them at their 

 extremities) towards either side, and a narrow dorsal line (con- 

 necting them in the centre) black ; but all of them more or less 

 confluent, and occasionally quite disjointed. Elytra likewise 

 alutaceous (but, from the surface being a little rougher, or more 

 uneven, less distinctly so), and most minutely and remotely 

 punctulated ; and with the fasciae dark and very similar to those 

 of the A. Euphorbia, but with the hinder one of them generally 

 more broken and subobsolete. Limbs dusky testaceous. 



The pale, but beautifully marked, subglabrous, and compara- 

 tively unpunctured surface of this elegant Aphanarthrum will 

 immediately distinguish it from its two Madeiran allies. As 

 already stated, it was captured out of the same plants as, and in 

 company with, the preceding species, though somewhat less 

 abundantly. The Madeiran specimens differ in no respect from 

 the Canarian ones, except that they are perhaps a trifle less sub- 

 diaphanous or shining, and that their elytra are a little more 

 coarsely alutaceous, and with their punctures (although so dis- 

 tant and minute) rather more perceptible. Like the A.pis- 

 catorium, it will probably be found to occur throughout the 

 lower elevations of Madeira wherever Euphorbia piscatoria 

 abounds. 



