Mr. T. V. Wollaston on the Halticidae of the Canary Islands. 11 



17. Psylliodes stolida, n. sp. 

 P. breviter elliptica convexa senescenti- (rarius subviridescenti-) picea, 

 capi te defiexo, prothorace alutaceo minute et leviter punctato ; elytris 

 plus minus picescentioribus profimde punctato-striatis, interstitiis sub- 

 tilissime seriatim pimctulatis (punctulis vix observandis), antennis basi 

 pedibusque dilute testaceis, femoribus posticis picescentioribus. 

 Long, coi-p. lin, 1. 



Habitat in ins. Lanzarota et Fuerteventura, quasdam herbas prsesertim 

 Mercurialis annucB, L., destruens. 



The small, convex, aeneo-piceous Psylliodes described above, the 

 head of which is much deflexed, and the prothorax (in addition to 

 its shallow punctures) minutely alutaceous, is tolerably abundant in 

 certain parts of Lanzarote and Fuerteventura, — in the former of 

 which islands it was taken both by Mr. Gray and myself, on the 

 common Mercurialis annua, m the vicinity of Haria, during January 

 1858 ; and in the latter, by myself, at Oliva, towards the end of 

 March of the following year. 



Genus Ch^tocnema. 

 Stephens, lU. Brit. Ent. iv. 325 (1831). 



18. Chcetocnema tarsalis, n. sp. 



C. subovata nitida, vel senea vel viridescenti-aenea, capita prothoraceque 

 dense et profunde punctatis, elytris profundius et rugose punctatis; 

 antennarum articulis intermediis gracilibus, basalibus, tibiis tarsisque 

 dilute testaceis ; femoribus (prtesertim posticis) picescentioribus ; tarsis 

 gracilibus longiusculis, articulo idtimo gracillimo elongate. 

 Long, coi-p. lin. 1. 



Habitat ins. Canarise, in graminosis ad Argeniguin, per marginem paludis 

 ejus juxta mare sitae, a meipso mense Aprili reperta. 

 The general aspect of the present Chcetocnema is almost the same 

 as that of the common European C. aridella, except that it is a little 

 more aeneous and shining, that the prothorax is somewhat more 

 truncated (or less produced behind), and that the intermediate joints 

 of the antennae are rather slenderer ; and it was not until closely over- 

 hauling it that I detected a structural character Avhich at once sepa- 

 rated it from its more northern ally. This consists in the formation 

 of the tarsi, which are very much naiTower and more elongated than 

 those of the C. aridella, with their apical joint especially (as com- 

 pared with the corresponding one in that species) long and slender. 

 The penultimate one also is less dilated than is the case in that 

 insect, and the whole foot has a different appearance. It was detected 

 by myself, on the 14th of April, 1858, at Argeniguin, in the south 



