NODA. 195 
Very closely allied to, and perhaps only a local variety of, WV. lefevrei ; the numerous 
specimens, however, before me agree in having the tibie entirely fulvous and the thorax 
opaque. The general colour of the upper surface varies from light or dark neous to 
metallic blue; the head is finely punctured on the vertex, much more strongly so 
between the eyes; the antenne have the second to the sixth or the second to the 
seventh joints fulvous, the first one above and the terminal joints fuscous or bluish- 
black; the thorax is nearly always of a duller colour than the elytra, and its sides are 
strongly narrowed anteriorly; the surface is usually much more finely and sparingly 
punctured than in N. lefevrei (the punctuation sometimes almost obsolete); the disc of 
the elytra is generally finely geminate-punctate-striate, the sides much more strongly 
punctured in single rows, and the interstices at the apex are strongly costate; the legs 
are eneous, the tibie entirely fulvous. The female insect, although more strongly 
punctured than the male, does not differ materially in other respects. The Teapa 
specimens may represent yet another closely-allied species: they differ in having the 
thorax and elytra more shining and more strongly punctured, and in the base of each 
of the apical joints of the antenne being fulvous; the tibie agree, however, in colour 
with those of the specimens from Tapachula (I have not seen a single specimen of 
N. lefevre thus coloured, the fulvous tint being always confined to the extreme apex 
of the tibiz). . 
It may be remarked that one of the localities for WV. opacicollis is on the Pacific, the 
other on the Atlantic slope. 
9 (s). Noda chontalensis. 
Cupreous or dark blue, the basal joints of the antenne fulvous; thorax very finely but not very closely punc- 
tured; elytra finely and regularly punctate-striate. 
Var. Legs obscure fulvous. 
Length 13-1? line. 
Hab. Nicaracva, Chontales (Janson). 
Of rather convex and subcylindrical shape, dark blue or metallic cupreous; the 
thorax but little rounded at the sides, its surface not very closely nor very finely 
punctured ; the elytra a little more strongly and rather closely punctate-striate, the 
arrangement in double rows only here and there perceptible, the interstices smooth. 
N. chontalensis, of which the sexes scarcely vary except in size, is more finely punctured 
than NV. lefevrei, from which it also may be known by the elytra having the interstices 
smooth near the apex in both sexes. In N. viridis the thorax is almost rugosely punc- 
tured; in WV. subdcylindrica the thorax is also quite differently sculptured, and the 
elytra are strongly punctate-striate; in WV. fulvicornis the thorax is proportionately 
longer, and the antenne and legs are fulvous. 
2c2 
