Coleoptera of the Canary Islands. 153 



biarum laxo arido (necnon rarius etiam in Plnis canariensibus), 

 passim. 



The P. deplanatus was taken abundantly, by myself, during 

 February, 1858, from under tlie dry outer fibre of dead Euphor- 

 bias, at a low elevation in the region of El Golfo, on the west of 

 Hierro ; and, in less profusion, by Mr. Gray, in the east of that 

 island. It does not appear, however, to be confined exclusively 

 to the Euphorbias (though evidently most partial to them) ; as I 

 captured a single example, during the following May, beneath the 

 bark of a Pinus canariensis at the Agua Mansa of Teneriffe ; and 

 another, in a similar position, at the edge of the Barranco above 

 Santa Cruz of Palma. Out of 0)5 specimens now before me, S2 

 are males and 33 females. 



Fam. TELMATOPHILID^. 



Genus Thallestus, nov. gen. (PI. VII. fig. 4 et 6.) 

 Corpus parvum, oblongum vel elliptico-oblongum, subconvexum, 

 pubescens : prothorace ad latera minutissime subcrenulato et 

 strid elevata sublaterali utrinque instructo : scutello trans- 

 verso : atis amplis. Antennse (fig. 6 a) capitis prothoracisque 

 longitudine, subgraciles, clavatse, articulo Imo leviter robusto, 

 2do graciliore paulo breviore, sequentibus 7 (i.e. ad clavam) 

 latitudine subaequalibus, a Stio longiusculo longitudine gra- 

 datim decrescentibus reliquis clavam magnam laxam abrup- 

 tam biarticulatam eflficientibus (lOmo magno poculiformi, 

 llmo orbiculato basi truncato). Labrum submembranaceum, 

 transversum, antice rotundatum integrum ciliatum. Mandi- 

 bulce (fig. 6 b) validae, acutse, ad basin externam fisso-sinuatas, 

 intus excisse ciliat^ et membrana auctae. Maxillce (fig. 6 c) 

 bilobee : lobo externa subovato, apice valde et longe pube- 

 scenti : interno paulo breviore, valde pubescenti, inarmato. 

 Palpi maxillares articulo Imo angusto ffexuoso, 2do Stioque 

 crassioribus subeequalibus, ultimo elongate, fusiforrai basi 

 truncato: lab'iales (fig. 6d) articulo Imo subflexuoso, 2do 

 paulo longiore crassiore, ultimo maximo crasso subsecuri- 

 formi-truncato. Mentum amplum, elongatum, basi latum, 

 inde ad apicem valde et facile angustatum, summo apice sat 

 profunde excavato-emarginato. Ligula cornea, quadrata, 

 apice membrana divergenti pilosa aucta. Pedes (fig. 6 e) 

 graciles : tlbi'is gracilibus, apice calcaratis : tarsis 5-articulatis, 

 subtus longe pilosis, articulis Imo, 2do et Stio subaequalibus 

 (ado paulo longiore), inter se (prsesertim Imo et 2do) arete 

 applicatis (suturis valde obliquis et cegre obscrvandis), 4to 



