162 Mr. T. Vernon Wollaston on the Euphorbia-infesting 



Found exclusively, so far as I have hitlierto observed, beneath 

 the loose rotten bark of the Euphorbias, particularly about the 

 lower portions of the stems (where they come in contact with the 

 damp earth), — under which circumstances I took it, along with 

 (though far scarcer than) the Eutriptiis putricola, in the region of 

 El Golfo, on the west of Hierro, during February, 1858. In 

 company with it I also captured a closely allied species, the 

 E. politum, — from which, however, the E. ovale may be known by 

 its rather larger size and less rounded outline, by its somewhat 

 more depressed, less shining and less glabrous surface, by its 

 prothorax being more sinuated at the sides (with its sublateral 

 line more curved), and by its entire punctuation being stronger 

 and much more dense. It is likewise nearly related to a third'j" 

 species, which seems to be confined to the laurel-districts of 

 higher elevations; but is a little more oval in outline (being just 

 perceptibly less acute both before and behind), less deeply punc- 

 tured, and with its sublateral prothoracicline a trifle less straight- 

 ened, — it being more ev'\Ae\\\\y curved-outwards at the base (towards 

 the posterior angle). For the figure of the E. ovale I am in- 

 debted to Professor Westvi'ood. 



t I subjoin a diagnosis of this third species, — which will serve to point out its 

 distinctions from its two near allies, described above. 



Enlrachium punctatum, n.sp. 



B. nigrum, elliplico-ovale (antice et postice subacutum), subnitidum, pro- 

 funde punctatum, parce et minutissime cinereo-pubescens ; prothorace lon- 

 giuseulo, ad latera subsinuato, stria laterali subrecta ; elytris postice attenu- 

 atis, punctis sub-sulcato-confluentibus ; antennis pedibusque piceis, illarum 

 capitulo ferrugineo. 



Long. Corp. lin. f — vix 1. 



Habitat in locis editioribus sylvaticis TenerifFag et Palmae, rarissimum. 



Apart from its attachment to the laurel-regions of intermediate and lofty ele- 

 vations (in lieu of the E?(p/iO)bia-districts of the lower altitudes), the E. puncta- 

 tum may be recognized from the ovale (to which it is very closely allied) by 

 being a little more elliptic in outline (or subacute both before and behind), by its 

 disiinctly coarser punctuation (especially of the elytra, where the punctures have 

 a tendency, when viewed beneath the microscope, to be disposed in irregular 

 longitudinal grooves, or furrows, — and, theiefore, in a measure, sub-confluent), 

 by its antennal-club being more brightly ferruginous, and by its lateral protho- 

 racic line being straighter, — or not at all curved-outwards at the base (as in that 

 species) towards the posterior angle. It appears to be very scarce, occurring 

 under the bark and chippings of forest-trees within the damp sylvan districts, I 

 have taken it in the wood of the Agua Garcia, as also above Taganana and at Las 

 Mercedes, of TenerifFe ; and in the Barranco de Galga, of Pal ma. 



