AMERICAN COMPONENTS OF THE TENTYRIIN^ 521 



evenly convex, the apical bead extending entirel}- across, rather 

 coarsely, sparsely and irregularly punctate, without smooth line, 

 but little more coarsely or less sparsely so laterally, except in a 

 narrow longitudinal area near lateral sixth and along the lateral 

 edges, where the punctures are less coarse but dense ; scutellum 

 moderate, fully as long as wide, narrowly rounded ; elytra two- 

 thirds longer than wide, almost four times as long as the pro- 

 thorax and nearly two-thirds wider, rapidly and angularly nar- 

 rowed in about apical fourth, the apex acute, the sides parallel 

 and feebly arcuate to the broadly rounded and rectangular humeri, 

 which are widely exposed at base, the elongate callus very strong; 

 surface not impressed apically, even, without impressed lines, 

 coarsel}' and sparsely, confusedly punctate, the punctures becom- 

 ing very coarse and muricate, though not much more close-set, 

 laterally ; abdomen sparsely, moderately finel}' punctate. Length 

 14,8 mm.; width 6.3 mm. Argentina (Mendoza), — Rolle. 



farctus n. sp. 



It is possible that this may be identical with some one of the 

 forms described by Berg or Fairmaire, but I am unable to con- 

 firm this at present, as the species are numerous and rather 

 closely allied ; I have two others among my material, both un- 

 determined. All of these species, in fact, may possibly have 

 been previously described but, as the literature is inaccessible 

 at present and it became necessary to definitely fix the types of 

 the new genera here defined, they are described as new with 

 sufficient detail to secure identification. 



III. 



In the new edition of the European Catalogue of Hey den, 

 Reitter and Weise, some changes of nomenclature appear, that 

 were overlooked in drawing up the table of tribes on pages 277- 

 282 of this paper. It appears that the genus Capnisa, of Lacor- 

 daire, must be designated Gnathosia Fischer, in future, and 

 the genus Gnathosia^ of Lacordaire, be known under the name 

 Dailognatha Esch. It is not possible for me to confirm this 

 nomenclature at present, but it should be recalled as significant 

 that Motschulsky, in characterizing his Emmetiastus compactus 

 (ante p. 287), makes use of language that is absurd if we accept 

 Capnisa in the Lacordairean sense, but perfectly intelligible if 

 we consider Capnisa^ of Lacordaire, to be in reality the Gna- 

 thosia^ of Fischer, the outline in this genus being oval and 



Proc. Wash. Acad. Sci., October, 1907. 



