Coleoptera of the Canary Islands. 149 



is very distinct, and is continued along the sides of the head like- 

 wise (in tiie same manner as it is along the pronotum) ; but in 

 Caulonomus (which would appear to be osculant between that 

 family and the Colydiadce) the prothoracic line is very delicate, 

 and only just traceable, whilst the hinder region of the head is 

 free from it altogether — it being only indicated on the anterior 

 portion, namely, from the clypeus to either eye. I lay less stress 

 on the construction of its- feet, because the basal joint in most of 

 the Cucujidce is of such infinitesimal magnitude as to be extremely 

 difficult of observation — so that it is often almost impossible to 

 decide for certain whether it be absent or present ; and it is, con- 

 sequently, a character concerning which we may be liable to err. 

 Nevertheless I may state that, so far as I have been able to 

 satisfy myself on the subject, I believe that the tarsi are (as regards 

 the number of their articulations) on the type of those of Lcemo- 

 fhloeus and the allied groups, namely, pentamerous in the females 

 and heteromerous in the males (the basal one, in both sexes, being 

 excessively minute, and buried in the apex of the tibia). 



Having thus stated the main points in which our present genus 

 agrees with the Cucujidce, and with Lcemophloetis and Phlceonomus 

 in particular, I may add that it is removed from them in the exact 

 proportions of its antennal joints (the second and third of which 

 are shaped somewhat like those in Pediacus, whilst the ultimate 

 one is much narrower than the preceding two), in its large sub- 

 quadrate and apically-truncated upper-lip, in its narrower man- 

 dibles, in the rather shorter terminal-articulation of its palpi, and 

 in its posteriorly-abbreviated elytra (which leave the pygidium 

 exposed, though not so much as is the case in Europs). 



6. Caidoncmus rliyzophagoides* , n. sp. (PI. VII. fig. 2.) 



C. angustus, piceus vel rufo-piceus, nitidus et fere calvus [oculo 

 valde armato minute et parce pubescens] ; capite protho- 

 raceque minute punctulatis, hoc antice vix latiore, in disco 

 (prsesertim antice) leviter longitudinaliter impresso ; elytris 

 leviter punctato-striatis, plus minus piceo-ferrugineis, ad 

 apicem necnon interdum circa scutellum plerumque nigres- 

 centioribus ; antennis piceis, basi rufescentioribus ; pedibus 

 ferrugineo-piceis. 



Var'iat colore omnino dilutiore. 



Long. corp. lin. 1 — 1^^. 



Habitat ins. Lanzarota, Teneriffa et Hierro, in ramulis Euphor- 

 biarum emortuis una cum Europs imprcssicoUis degens, sed multo 

 rarior. 



First detected by Mr. Gray and myself, during January, 1858, 



