PLATYDEMA. | 203 
strongly transverse, distinctly margined at the sides, convex, the sides slightly rounded and rapidly 
narrowing anteriorly, the anterior angles rounded, the apex. feebly emarginate, the base bisinuate, the 
surface very finely, shallowly, and diffusely punctured, red, the disc (except along the base) broadly infus- 
cate, midway between the outer limits of which and the lateral margin is an oblique black streak ; 
scutellum triangular, red ; elytra scarcely wider than the prothorax at the base, slightly rounded at the 
sides, regularly punctate-striate (the punctures rather coarse and deeply impressed), the interstices exceed- 
ingly finely and rather closely punctured, testaceous, with ‘two large black spots on each side near the 
base, and a very broad angulated, black band (distant from the suture, and not reaching the lateral margins, 
and ramifications of which extend posteriorly along the fourth, sixth, and eighth interstices, enclosing 
testaceous patches), the second interstice (except at its basal third and the extreme apex) is also black, 
_ the suture (except at the basal third), and the third interstice for a short distance in the middle, reddish 
brown ; legs testaceous, the outer edges of the tibic finely setose ; beneath shining, almost smooth ; epi- 
pleure not extending to the apex of the elytra. 
Length 5 millim. 
Hab. Mexico, Cordova (Hége). 
One example. 
45. Platydema cordovense. (Tab. IX. fig. 10.) 
Form of P. lucens. Head red, finely and not very closely punctured, the epistoma not distinctly defined ; 
antenne and prothorax as in P. lucens, the disc of the latter with a broad transverse black patch, the 
margins alone broadly reddish, the surface rather more evidently punctured ; elytra testaceous, with three 
large black spots on each side (one near the base, one larger, angular on its basal edge, about the middle, 
and one near the apex), a large subtriangular black mark immediately below the scutellum, beyond 
which to the apex the suture is reddish brown, the interstices rather more evidently punctured than in 
P. lucens. 
Length 5 millim. 
Hab. Mexico, Cordova (Saillé). 
One example. Closely allied to, and from the same locality as, P. /ucens, and only 
differing in the markings of the thorax and elytra. Additional material may possibly 
prove it to be a variety of that species; but for the present I prefer to retain it as 
distinct. | 
46. Platydema unicolor. (Tab. IX. fig. 11.) 
Ovate, convex, bright red, shining. Head shallowly, sparingly, and not very finely punctured, the epistoma 
limited posteriorly by a shallow transverse impression; antenne with from 4-6 basal joints, and 
the outer half of the apical one, red, the rest black, the penultimate joint transverse; prothorax trans- 
verse, rounded at the sides, narrowing from the base, the anterior angles broadly rounded, the apex 
almost straight, the base bisinuate (but not strongly) and with a distinct oblique fovea on each side, the 
surface very finely, shallowly, and sparingly punctured ; scutellum scutiform; elytra about the width of 
the prothorax at the base, feebly rounded at the sides, regularly punctate-striate (the punctures deep, 
rather coarse, and not closely placed), the interstices exceedingly finely and sparingly punctured ; legs 
red, the outer edge of the tibiz finely setose. 
Length 44-57 millim. 
Hab. Nicaraaua, Chontales (Janson). 
Two examples. 
Var. The basal joints of the antenne and the palpi more or less stained with piceous ; the basal and apical 
2DD 2 
