South American species of Diahrotica. 37 



plicate below the humeral callus ; disk with several very faint 

 longitudinal sulcations, only visible when viewed obliquely. 



This species, for the possession of which I am indebted 

 to the kindness of Mr, Jacohy, differs in its smaller size 

 and in the absence of any flavous coloration on the disk 

 of the elytra. The specimen before me appears to be 

 a ? ; in the absence of the other sex I am compelled to 

 keep the two species distinct. 



Spec. 65. Diahrotica Gorhami. 



Anguste oblonga, postice vix ampliata, pallide prasina, nitida, 

 abdomine flavo, pectore, scutello capiteque nigris, clypeo utrinque 

 antennisque piceo-flavis, tibiis tarsisque fulvo-*inctis, thorace con- 

 vexo, non-foveolato ; elytris tenuiter sat crebre punctatis, ad latera 

 plicatis, utroque vitta brevi suturali communi alteraque humerali 

 nigris, macula transversa pone medium picea. 



Long. 3 liu. 



Hah. Ecuador (Buckley). A single specimen in my 

 cabinet. 



Head not longer than broad, subrotundate ; clypeal ridge 

 strongly raised; antennae nearly three-fourths the length of the 

 body, filiform, the second joint short, the third rather longer, the 

 fourth longer than the preceding two united. Thorax nearly one- 

 half broader than long ; sides straight and parallel from the base 

 to the middle, thence rounded and converging towards the apex ; 

 disk convex, obsoletely deflexed on the sides. Elytra oblong, 

 slighly dilated posteriorly, convex, rather strongly plicate below the 

 humeral callus, disk rather closely impressed with fine punctures. 



Diahrotica Gorhami agrees to some extent with D. 

 nigromaculata, Jac. ; it is, however, more oblong in 

 form, more convex and the disk of the elytra is without 

 the longitudinal sulcations present in the latter species ; 

 the post-medial spot is probably at times more strongly 

 developed. 



Spec. 66. Diahrotica quinquemaculata, Fabr. 



Galeruca quinquemaculata, Fabr., Syst. EL, i., p. 452 ; 

 Oliv., Ent., vi., p. 659, tab. 8, fig. 77. 



Anguste ovata, postice ampliata, convexa, flava, nitida, pectore, 

 scutello capiteque nigris, antennis piceo-fulvis, articulis intermediis 

 ultimoque piceis ; thorace non-foveolato, fulvo-rufo ; elytris sat 

 crebre punctatis, lateribus obsolete plicatis ; vittis basalibus tribus, 



