the Atlantic Cossonides. 405 



crjiial (after the fashion of tortoise-shell), its prothorax is more 

 rounded at the sides, rather coarsely alutaceous, and very much 

 more finely and remotely punctured (and with comparatively 

 larger addilional punctures in its central basal depression), its 

 elytra are more evidently (though only very slightly) sub-pube- 

 scent and vvith their striae proportionably broader and deeper, 

 and its funiculus-joints are altogether somewhat shorter and more 

 compact. From the Madeiran 71/. Eiiphorh'icz! it may be known, 

 inter alia, by its darker hue, more laterally-rounded jirothorax 

 (which has its hinder central punctures much more coarse), by 

 its larger frontal fovea, and by its elytral striae being very much 

 broader, deeper, and more distinctly crenated. 



§ II. Corpus vrinus, suh-fus'iforvie (ehjtris postice scns'im acuviinitl'is); 

 femnribus masculis subfus obtuse siih-denlal'is. 



39. Mcs'itcs fus'ifonnis, n. sp. (PI. 19, figs. 7, 9.) 

 71/. nigro-piceus, nitidus, deprcssus, fere calvus ; fronte inter 

 oculos profunde foveolata ; prothorace in disco levissime et 

 parce punctulato, sat obscure carinato necnon poslicc in 

 medio impresso et ibidem profunde sub-biseriatim punctato ; 

 elytris plus minus nifescentioribus, jn-ofunde pnnctato-stri- 

 atis, intcrstitiis planiusculis, minutissime et parce punctulalis ; 

 antennis pedibusque rufescentioribiis. 



Mas. — Rostro punctulato, ad antennarum insertiouem ])au!o 

 votundato-ampliato ; prothorace versus latera vix profundius den- 

 siusque (quam in disco) pnnctato. 



Teem. — Rostro graciliorc, tereti, polito, rufo-picco, ad anten- 

 narum insertioncm (i. e. mox ante basin i})sani) paulo am])h"ato ; 

 prothorace versus latera multo profundius densiusque (quam in 

 disco) punctato. 



Long. Corp. lin. 1^ — 3. 



Habitat insulas Canarienses, ramos Euphorbiarum cmorluos 

 ubique destruens. 



The present Mcsiles and the M. pub'ipenn'is may be at once 

 known from those already enumerated by their sub-fusiform out- 

 line (their elytra being more or less perce])tibly attenuated pos- 

 teriorly), and by their male-feuiora being obtusely iwi-dentate 

 beneatli ; whilst inter se they will be recognised by the M.fusi- 

 Jhrinis being (like the five preceding species) free from any trace 

 of the lurid pubescence which is so conspicuous in the Palman 

 representative. IMie iM. fusiformis is, likewise, less deeply scidp- 

 tured than the pubipeiinis ; and its elytral interstices arc less 



