110 Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 



for these aberrant Ptini the title of Tipnus (even with the actual 

 knowledge, moreover, that I had both previously separated them 

 under that of Sphcericus, and had given careful figures of no less 

 than three !) ; but, in spite of this, it is of course evident that 

 Sphcericus has the priority, and must therefore be retained. 



5. Tomicus Dohrnii (Ins. Mad. 290). — It seems likely, accord- 

 ing to information which I have received from Mr. Janson 

 (though I have not yet myself had an opportunity of comparing 

 the two species), that this insect will prove to be identical with 

 the Bostrichus Saxesenii of Ratzeburg. 



6. Phlceophthorus perfoliatus (Ins. Mad. 301). — It is pretty 

 nearly certain that this insect is coiucident with the Ptinus rhodo- 

 dactylus of Marsham (Ent. Brit. 87, 1802); but the genus must 

 certainly be retained ; so that the species should be quoted as the 

 Phlceophthorus rhododactylus, Marsham. In further confirmation 

 of its being identical with the European insect, I may state that 

 several specimens of it were taken by Mr. Bewicke, at S. Antonio 

 da Serra, during the summer of 1859, out of decayed stems of 

 the common Broom, under which circumstances it very fre- 

 quently occurs in more northern latitudes. 



7. Rhyncolus capitulum (Ann. Nat. Hist. 3rd ser. ii. 410, 1858). 

 — As already stated, I inadvertently re- characterized this insect, 

 in my last year's " Additions to the Madeiran Coleoptera," under 

 the name of Hexarthrum compression. The mistake arose, first, 

 from the original type being no longer in my possession for 

 comparison ; and secondly, through my having failed to exa- 

 mine with sufficient care, whilst describing it, the structural 

 features of the " R. capitulum," — thus not perceiving at the 

 time that it possessed but six joints to its funiculus, and that it 

 was therefore no Rhyncolus at all. Hence, whilst the genus 

 Hexarthrum, which I enunciated in 1860 (Ann. Nat. Hist. 

 3rd ser. v. 448), must be retained, the specific title of compressum 

 should of course be cancelled; and the insect will stand as 

 Hexarthrum capitulum. 



8. Rhyncolus tenax and calvus (Ins. Mad. 307; and Ann. Nat. 

 Hist. 3rd ser. v. 448). — In a memoir on the "Atlantic Cosso- 

 nides," lately published in the 'Trans, of the Ent. Soc. of Lon- 

 don ' (vide new series, vol. v.), I stated that the two Madeiran 

 insects which I have hitherto quoted as Rhyncoli will (from the 

 shape of their rostra and the proportions of the joints of their 

 comparatively elongate antennas) be better referred to Phlceo- 

 phagus ; and the only doubt that now remains is, whether the 



Caulophilus sculpturatus of the ' Ins. Mad/ should not, con- 

 sequently, be merged into Rhyncolus. As to this latter ques- 

 tion, I will not at present, in the absence of my original type, 

 attempt to solve it. 



