(3) 
PLAGIODERA. 243 
Head impunctate ; the basal five joints of the antenne fulvous, the other joints black, strongly transverse, the 
first joint thickened, the second elongate, the following three joints gradually shortened ; thorax about 
three times as broad as long, slightly longer at the sides than at the middle, the lateral margins but little 
rounded, the disc impunctate; scutellum obscure piceous; elytra rounded, convex, rather strongly and 
closely punctured, the punctures arranged in very irregular rows, which are here and there separated by 
smooth longitudinal spaces, the lateral margins thickened and accompanied by an impressed line, which is 
very strongly marked towards the base, the suture very narrowly and six round spots on each elytron 
metallic green, the spots placed thus—one at the shoulder, two obliquely before, two others (more 
transversely) below the middle, and one near the apex; underside darker than above; the knees and 
tarsi black. 
Hab. Panama, Volcan de Chiriqui (Champion). 
A single specimen. 
16. Plagiodera obscuripennis. 
Subrotundate, convex, fulvous, the apical joints of the antenne black; thorax nearly impunctate; elytra 
blackish, finely and subremotely punctured, the lateral margins and the epipleure fulvous. 
Length 23 lines. ; 
Head fulvous, entirely impunctate; the antenne short, the last six joints strongly transverse, black, the others 
fulvous; thorax strongly transverse, the sides straight, greatly narrowed in front, the posterior margin 
oblique on each side, straight in front of the scutellum, the angles obtuse, the surface impunctate or with 
a few minute punctures; scutellum fulvous, its apex broadly rounded ; elytra blackish, with a faint bluish 
gloss, the shoulders slightly raised, the surface finely but not closely punctured, the punctures arranged 
partly in double rows near the suture, the extreme lateral margins and the epipleure fulvous; underside 
and legs fulvous, impunctate. 
Hab. Mexico, Acapulco in Guerrero (Hége). 
The nearly impunctate thorax, the blackish elytra, and the extremely narrow fulvous 
margin of the latter principally distinguish P. obscuripennis. 
17. Plagiodera arizone. 
Plagiodera arizone, Crotch, Proc. Ac. Phil. 1873, p. 53°. 
Hab. Norra America, Arizona !.—Mexico, Northern Sonora (Morrison). 
The specimens received from Mr. Morrison, and named by him P. arizona, agree 
with the short description given by Crotch, who says that the species is extremely near 
P. californica, Rogers; this latter, however, belongs to the genus Lina, and differs 
totally in colour from the present insect, being entirely of a blackish-green hue. In 
P. arizone the head, thorax, underside (with the exception of the breast, which is 
dark bluish), and legs are fulvous, and the elytra are obscure greenish or bluish; the 
first four joints of the anteune are fulvous, the rest black; the thorax is finely and 
very irregularly punctured (sometimes almost impunctate on the disc); the elytra 
may be described as rugosely punctate, the interstices being everywhere transversely 
wrinkled. PP. arizone is omitted from Gemminger and Harold’s Catalogue, and also 
from that of Duvivier. 
