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



decrescentibus), gradatim leviter bilobis, 4to minuto inter lobos 

 tertii sub-recepto, ultimo longissimo vix clavato ungidculis 

 magnis simplicibus munito. 



Obs. Genus Pedlaci formam simulans et illo affinitate proxi- 

 mum ; sed prothorace simplici (nee ad latera denticulate), 

 antennarum articulis intermediis inter se subaequalibus (nee 

 alternatim majoribus et minoribus), maxillarum lobo externo 

 angustulo, interno latiore et ad apicem ipsum distincte unci- 

 nate (nee inarmato), ligula in medio cornea cordata, mento 

 ad apicem baud emarginato, tibiis posticis masculis curvatis 

 et per marginem internum fortiter ac mirande denticulatis, 

 necnon tarsorum articulo basali (in utroque sexu) magno, 

 secundi longitudine (nee minuto), praeter csetera, a Pediaco 

 recedit. 



A Trplaroc, qui lignum serra desecat, et o-iceXic, tibia [i. e. 

 tibia mascula postica]. 

 So nearly, at first sight, does the present genus assimilate 

 Pediacus, that it was not until I had examined it critically tliat I 

 perceived its distinctions, — which, nevertheless, are very important 

 ones. Thus, not only is its pronotum simple (being alike free 

 from discal fovese and lateral denticulations), but its intermediate 

 antennal joints are subequal (instead of being alternately large and 

 small, as in the members of that group) ; its outer maxillary-lobe, 

 also, is much narrower than is the case in the Pediaci, whilst the 

 inner one (instead of being unarmed) is minutely uncinate at the 

 tip ; the central portion of its ligula is subcorneous and singularly 

 cordate; its mentum is totally unemarginate in front; its first 

 tarsal-articulation (instead of being minute) is large, and quite 

 equal to (if not indeed somewhat longer than) the second; and its 

 hinder male-tibi« are most curiously developed, — being curved 

 and robust, and beset internally with nine or ten most distinct 

 (but totally disconnected) teeth. In its flattened body, pallid hue 

 and general contour, Pristoscelis agrees with Pediacus. 



8. Pristoscelis deplanatus, n. sp. (PI. VII. fig. 3.) 



P. rufo-ferrugineus, depressus ; capita prothoraceque confertis- 

 sime punctatis; elytris rufo-testaceis, subnitidis, leviter punc- 

 tato-striatis, singulo costa submarginali elevatd longitudinali 

 instructo ; antennis pallide rufo-ferrugineis ; pedibus rufo- 

 testaceis. 



Long. Corp. lin. If — 2. 



Habitat ins. Teneriffa, Palma et Hierro, sub cortice Eiiphor- 



