the Atlantic Cosaonides. 367 



Genus Rhyncolus. (PI. 18, fig. 3.) 

 (Creutz), Germar, Ins. Spec. 307 (1824). 

 The RhyncoU and Phlceop/iagi are very closely related inter se ; 

 and of tlie three Madeiran exponents I have hitherto regarded 

 only one (the P. sulcipenms) as belonging to the latter, assigning 

 tlie otlier two (/?. tenax and calvus) to the former. The detection, 

 however, of a typical Rhyncolus in the Canary Islands has induced 

 me to believe that the whole three of these Madeiran representa- 

 tives are better referred to Phlccophagus, with the recorded cha- 

 racters of which they have certainly more in common. Thus, whilst 

 the rostra of the true RhyncoU are more or less abbreviated and 

 thick, and the antennae (18, 3 a) short, with their funiculus-joints 

 closely compressed together (the second one, moreover, being as 

 short as, or even shorter than, the third), and with their capitulum 

 usually small ; in the Phloeophagi the rostra and antennae are for 

 the most part longer and slenderer, the club of the latter is more 

 abrupt, and the joints of the funiculus "are more separated or dis- 

 tinct, the second one of which is obconical, and decidedly longer 

 than the third. The Phlceophag'i, also, have their prothorax gene- 

 rally more rounded at the sides than is the case with the RhyncoU, 

 and the humeral angles of their elytra rather more sloped off or 

 obliquely-truncated ; but in this latter particular (which is not a 

 very important one) the two Madeiran insects which I had regarded 

 as RhyncoU partake more of the Rhyncolus- than of the Phloeo- 

 ■phagus-iy^c. 



3. Rhyncolus crassirostris, n. sp. (PI. 18, fig. 3.) 

 R. piceus, subnitidus ; rostro brevi, lato, triangulari, sat crebre 

 punctulato, oculis oblongis, valde demissis ; prothorace pro- 

 funde punctato (punctis magnis et versus latera confertis), ad 

 latera minus rotundato ; scutello transverso ; elytris profunde 

 punctato-striatis, interstitiis sub-convexis et minute sub-seria- 

 tim punctnlatis ; antennis brcvissimis pedibusque rufo-piceis, 

 illarum capitulo rufo-ferrugineo, solidissimo, ad apicem valde 

 truncate. 



Long. corp. lin. Ig. 



Habitat in truncis emortuis Pint canariensis, una cum genere 

 prascedenti degens ; in regione " Tarajana" ins. Canariae mense 

 Aprili A.D. 1858 primus inveni. 



The present Rhyncolus has much the general appearance of the 

 European R. truncorum ; nevertheless its rostrum is broader and 

 shorter (being very thick and triangular) ; its antennEe (18, 3a) are 



