PKIONODEKA. 131 



mediate piceous joints of the antennae, a constant character in all the specimens I have 

 examined ; but in the Guatemalan specimens the apical joints are also piceous, and 

 the elytral sculpture is rather finer ; but I scarcely think this sufficient to consider them 

 to belong to another species. The figure is from a specimen from Costa Rica. 



2. Prionodera salvini. (Tab. VIII. fig. 20.) 



Elongate, slightly widened behind, fulvous ; last six joints of the antennae obscure piceous ; thorax bifoveolate, 

 strongly punctured, three-dentate ; elytra metallic green, geminate- punctate-striate, interstices longitu- 

 dinally costate. 



Length 4 lines. 



Head with large and smaller punctures at the vertex, and a cruciform depression at the middle ; antennae half 

 the length of the body, fulvous, the last six joints obscure piceous ; thorax with a deep transverse depres- 

 sion at each side, lateral margins distinctly three-dentate, surface strongly and irregularly punctured 

 throughout ; scutellum fulvous ; elytra slightly transversely depressed below the base and widened poste- 

 riorly, of a bright metallic green, surface very strongly impressed with double rows of punctures, the 

 interstices from base to apex strongly longitudinally costate ; underside and legs entirely fulvous. 



Eab. Costa Rica {coll. Salle) ; Guatemala (coll. Baly). 



From P. amasia the present species is easily distinguished by the highly raised longi- 

 tudinal costae of the elytra and the colour of the antennae. 



3. Prionodera hirtipennis. (Tab. VIII. fig. 21.) 



Elongate, parallel, fulvous ; antennae black, the three basal joints testaceous ; thorax obscure, sinuate at side s 

 elytra metallic green, the lateral margin and the apex fulvous ; surface irregularly punctured and trans- 

 versely rugose, with rows of yellowish hairs. 



Length 2J-3 lines. 



Head closely and rather deeply punctured; clypeus concave at its anterior margin, impunctate; antennas 

 nearly as long as the body in the male, shorter in the female, black, four basal joints testaceous ; thorax 

 closely and distinctly punctured, with a very shallow depression at each side, the lateral margins obsoletely 

 bisinuate ; elytra elongate and parallel, of a very bright metallic green, the lateral margin and the apex 

 narrowly testaceous or fulvous, disk closely rugose punctate, the interstices with some fine fulvous 

 pubescence, set in rows at regular intervals ; underside and legs light fulvous, the latter also covered with 

 hairs ; anterior tarsal joint in the male slightly thickened. 



Hah. Guatemala, Capetillo (Champion). 



About twenty specimens of this very distinct and pretty little species were obtained in 

 the above locality only. The female is generally larger than the male, the punctuation 

 of the thorax coarser and more irregular, the antennae shorter, and the anterior tarsal 

 joint elongate and slender. The pubescence on the elytra is a peculiar feature of this 

 species. 



PROMECOSOMA. 



Promecosoma, Lefevre, Ann. Soc. Ent. France, 1877, p. 126. 

 Metaxyonycha, Chapuis, Gen. des Coleopt. x. p. 246. 



The present genus bears a great resemblance to the preceding one, and has in con- 

 sequence been united with it by Chapuis; M. Lefevre, however, has divided the two 

 genera again, on account of the different antennae and general appearance of the insects, 



s2 



