Zoological Society. 221 



rugose, and has fine longitudinal keels on the upper surface, of which 

 the central one is most strongly developed, and the one next it on 

 each side indistinct. The head is convex above, and thickly punc- 

 tured. The thorax is about one-third broader than long ; the an- 

 terior margin is straight, and the lateral margins are very nearly 

 straight ; the anterior part is rather narrower than the hinder part ; 

 the hinder margin is in the form of a segment of a circle, being 

 produced in the middle, and joins the lateral margin so as to form a 

 somewhat salient but obtuse angle ; the upper surface is but very 

 slightly convex, and thickly and distinctly punctured. The elytra 

 are convex, and of an elongate -ovate form, and scarcely one-third 

 broader than the thorax ; the upper surface is densely clothed with 

 minute hairs ; punctate-striated, the punctures not very large, and 

 distinctly separated ; the interstices are plane, or indistinctly convex, 

 and are very finely ^ punctured. On each stria is a series of small 

 black and whitish spots, and these most of them are oblong. 



Adioristus angustatus. Ad. niger, fusco-pilosus ; antennis, tibiis 

 tar sisque fusees centibus ; rostro brevi, crasso, carinato ; thorace 

 punctulato ad later a et postice subrotundato ; elytris thorace paulb 

 latioribus, elongatis, subovatis, punctato-striatis, maculis parvulis 

 nigris ornatis. 



Long. corp. et rostri, 5j lin. ; lat. 2 lin. 



Hab. Valleys of Petorca. 



This species closely resembles the last in many respects, and espe- 

 cially in its colouring, and in being covered with minute ashy-brown 

 decumbent hairs, but it is of a narrower and more elongated form, 

 and of a much smaller size. 



The rostrum is about half as long again as the head, rugose, and 

 has three parallel keels on the upper surface, of which the central 

 one is the most prominent. The head is thickly punctured. The 

 thorax is scarcely one-third broader than long, slightly emarginated 

 in front ; the sides are nearly straight and parallel, but near the 

 anterior part they gradually converge, so as slightly to contract the 

 width of the thorax at this part ; about the posterior third of the 

 thorax the sides also converge towards the posterior margin, so that 

 the thorax may be described as obliquely truncated on each side be- 

 hind : the posterior margin is straight ; the upper surface is nearly 

 flat, and thickly and distinctly punctured. The elytra are moderately 

 convex and of an elongated ovate form, and about half as broad 

 again as the thorax; punctate-striated, the punctures of moderate 

 size and distinctly separated, excepting on the hinder part of the 

 elytra ; they are densely clothed with decumbent ashy-brown hairs, 

 and on each stria is a series of oblong blackish spots ; the interstices 

 are very delicately but thickly punctured. 



Adioristus conspersus. Ad. niger, subopacus, fusco-pilosus ; an- 

 tennis tarsisque fuscescentibus ; rostro brevi, crasso, carinato ; 

 thorace punctatissimo, subquadrato, postice paulb angustiore, modice 

 convexo, lateribus subrotundatis ; elytris quoad latitudinem thorace 

 fere cocequalibus , lateribus subparallelis, punctato-striatis, intersti- 

 tiis plants. 



