Coleopttra of the Canary Islands. 155 



those around Mycetophagus. As to their connection with the 

 Cleridce, in juxta-position with which some authors have placed 

 them, it is difficult to conceive in what it can possibly consist. 



Although so similar to B'tp/iyllus, in its structural minutiae, 

 Thallestus is nevertheless certainly distinct from it. The two 

 species described below are of a uniformly pallid hue, having no 

 tendency to fascise, or markings of any kind ; their antennas, also, 

 are longer and slenderer than is the case in Biphyllus (the inter- 

 mediate joints particularly being more elongate), their tibise are 

 narrower, and the edges of their prothorax are less coarsely 

 crenulated. 



9. Thallestus siibelUptlciis* n. sp. (PI. VII. fig. 4.) 



T. elliptico-oblongus, ferrugineus, breviter sericeo-pubescens ; 

 prothorace convexo, transverso, parce punctato, ad latera 

 vix sequaliter rotundato (basi subconstricto) ; elytris (una 

 cum antennis pedibusque) clarioribus, convexis subellipticis 

 basi truncatis, leviter substriato-punctatis, limbo incrassato. 

 Long. Corp. lin. 1 g. 



Habitat in ramis putridis Euphorbice canariensis, in montibus 

 supra Sanctam Crucem TenerifFse mense Februario a.d. 1859 a 

 meipso repertus. 



The rather larger size and more elliptic outline of this species, 

 in conjunction with its convexer and more finely sericeous surface, 

 its less abbreviated and somewhat posteriorly-constricted pro- 

 thorax, its altogether lighter sculpture, and the more thickened 

 margin of its elytra, will separate it readily from the T. ty- 

 phceoides. Its sublateral prothoracic costa, also, is a little more 

 evident ; and there are just traceable indications of a second line 

 on either side of the pronotum behind, within the other (or outer 

 one). The few specimens of it which have as yet come beneath 

 my notice were captured by myself, during February, 1859, in 

 the putrid stems of the Euphorbia canariensis, on the mountains 

 above Santa Cruz of Teneriffe. 



10. Thallestus typhceoides* n. sp. (PI. VII. fig. 6.) 

 T. oblongus, angustulus, ferrugineus, longe et dense pubescens ; 

 prothorace brevi- transverso, parce et profunde punctato, ad 

 latera aequaliter rotundato ; elytris (una cum antennis pedi- 

 busque) clarioribus, subparallelis, substriato-punctatis;, limbo 

 vix incrassato. 

 Long. corp. lin. Ij — vix IL 



