140 Mr. T. Vernon Wollaston on the Euphorhia-infesting 



attached to the Euphorbias in Madeira which have not been ob- 

 served hitherto at the Canaries ; added to which, the plants there 

 (which grow often in places difficult of access) have not yet been 

 so thoroughly examined as in the neighbouring archipelago ; and 

 it is, consequently, possible that, when such shall have been done, 

 a greater proportion of the Canarian species will be found to 

 exist. One or two, however, would seem strictly to represent 

 each other in the respective groups : thus, the Canarian Mesiles 

 J'usif'ormis is the exact counterpart of the Madeiran 31. Euphorbice, 

 and the Canarian Hypophloeus Euphorbice of the Madeiran H. am- 

 blguus. The Pldcephngus caidium might perhaps, also, be regarded 

 as the analogue of the Madeiran Caidolrwpis subnitidus; and the 

 Canarian Aphanarthrum affine as that of the A. Euphorbice. But 

 the several species vphich are apparently peculiar to that singular 

 and Cattus-W^e plant the E. canariensis are of course entirely 

 absent from the Madeiras, 



Fara. TR0G0S1TIDJ5. 



Genus Leipaspis, nov, gen. (PL VII. fig. 1.) 



Corpus sat magnum, lineare, angustura, subcylindricum, sculp- 

 turatum : captte magno, convexo, elongate, apice trisinuato, 

 fronte leviter canaliculata ; ocidis a raargine prothoracis an- 

 tico valde remotis, prominulis, oblongis, antice integris rotun- 

 datis, postice truncatis : prothorace elongato, basin versus 

 gradatim leviter attenuate, apice baud excavato, angulis 

 anticis obtusis : mesolhorace elongato, supenie valde con- 

 spicuo, scutello nullo : elytris elongatis, parallelis, limbo 

 (prsBsertim ad humeros) plus minus incrassato. Antennce 

 breves (capitis vix longitudine), articulo Imo inflato sub- 

 globoso, sequentibus ad clavam parvis gradatim paulo ma- 

 joribus (^do brevissimo), reliquis clavam magnam sat ab- 

 ruptam laxam triarticulatam efficientibus (9no et lOmo 

 eequalibus intus productis, llmo subsecuriformi-globoso). 

 Labrum (fig. la) corneum, transverso-quadratum, angulis 

 anticis rotundatis ciliatis, apice leviter emarginatum. Man- 

 dibulce robustissimse, corneas, triangulares, apice acutse biden- 

 tatse et infra apicem dentibus duobus parvis obtusis obscuris 

 auctae. Maxillce (fig. lb) lobo singulo maximo lato recto 

 intus et apice densissime longissimeque pubescenti instructae ; 

 lobo inlerno brevissimo, minutissimo, subobsoleto. Palpi 

 elongati ; maxillares articulo Imo parvo flexuoso, 2do 

 majore elongato subclavato, Stio hoc breviore, ultimo Ion- 



