282 LAMELLICOENIA. 



More than fifty examples, offering scarcely any differences of form or punctuation. It 

 is a broadly-ovate species, the outline being due to the flattened expansion of the sides 

 (including the marginal rim) of the elytra ; the convex interstices are smooth, except the 

 second, and towards the base the sixth, both which are irregularly punctured. The 

 pygidium is minutely punctured, and not closely strigulose as in P. psittacina ; and the 

 sternal process is more than twice as long as in that species and conical. Blanchard 

 described P. costata from a singular colour- variety, clayey reddish-tawny, which proves 

 to be a rare exception ; the great majority of our specimens being apple-green, 

 with the apical callus concolorous, and the thickened margins of the elytra and the 

 tarsi sometimes golden. Intermediate examples occur in which the upper surface 

 has strong yellow reflections. The pygidium in the female is flattened to the apex, 

 in the male it is evenly convex. The size varies from 25 to 35 millim. 



15. Plusiotis chloreis. (Tab. XVI. fig. 16, e .) 



P. costata; proxime affinis, sed minor, oblonga, thorace postice angustiore angulisque anterioribus valde porrectis, 

 acutis; elytris profundius punctulato-sulcatis lateribusque prope medium multo minus explanatis cum 

 margine minus incrassato ; toto lsete pomaceo-viridis, tarsis viridi-metallicis ; d" clypeus sicut in P. costata J , 

 apice aDguste sinuato; pygidio differt ante apicem protuberanti-convexo. Processus sternalis paullo 

 longior, acute conicus. $ ? Elytra versus apicem paullo dilatata margineque usque prope apicem 

 incrassato. 



Long. 25 millim. 6 2 ? 



Hab. Mexico, Volcan de San Martin {Salle). 



The second and sixth elytral interstices are, nearly as in P. costata, irregularly 

 punctured towards the base. This mode of sculpture and the much longer sternal 

 process distinguish the species from P. psittacina, which it resembles in the oblong 

 form of the body. The female example, very imperfect, is from Orizaba (Salle). 



16. Plusiotis prasina. 



Plusiotis prasina, Boucard, Proc. Zool. Soc. 1878, p. 295, t. 16. fig. 5 \ 



Hob. Mexico l , Orizaba, Yolos (Salle). 



Three examples, including, according to Boucard, a type-specimen. Length 30 



millim. d 2 ■ 



Closely allied to P. laniventris, the sides of the abdomen and the pygidium in the 

 male thinly clothed with long hairs. P. prasina differs, however, from that species in 

 the outer side of all the tibiae being smooth and not scabious, and in the entire upper 

 surface, but especially the elytra, being much more finely and smoothly punctured, 

 though in both the species the punctuation extends over the whole elytra. The punc- 

 tured strias are scarcely impressed. The female in both species has the same broadly- 

 ovate outline, with the sides broadly expanded and the outer margin flexuous or 

 arcuated. The legs are of a pinkish-clayey hue, the femora greenish, the tarsi 



