1879.] PHYTOPHAGOUS COLEOPTERA. 777 



Lac, equally different by its coloration and the deep punctures of 

 the elytra ; while L. hypochryseum, Baly, is devoid of the metallic 

 elytral band. 



Genus Chalcoplacis, Chevr. 



7. Chalcoplacis instabilis, sp. nov. 



Subrotundate-ovate. A.bove cupreous or dark blue, shining, head 

 cupreous or violaceous blue ; antennae black, their six basal joints ful- 

 vous ; thorax finely, elytra more deeply punctate ; below and the 

 legs black. 



Length 2 lines. 



Hab. Zapote, Guatemala. 



Head rather deeply punctured, lower part of face more closely 

 punctate than the vertex, clypeus not separated ; jaws very promi- 

 nent ; antennae subfiliform, third and fourth joints of equal length, 

 seventh and the following joints thickened, black, six basal joints 

 fulvous, the first stained with piceous above. Thorax transversely 

 convex, narrowed from base to apex, anterior angles acute ; surface 

 minutely punctured. Scutellum broad, impunctate. Elytra slightly 

 wider at the base than the thorax, convex, the extreme apex rather 

 acutely produced, surface much more strongly punctured than the 

 thorax, the puncturing arranged in irregular rows, the sutural margin 

 accompanied at its posterior third by an impressed line. The colour 

 varying from purplish cupreous to dark greenish blue. All the 

 latter-coloured specimens have the head igneous or cupreous, while 

 the reverse is the case with the cupreous ones, whose head is viola- 

 ceous. Underside black, legs with a coppery hue. 



Genus Noda, Chapuis. 



8. Noda tasmanica, sp. nov. 



Oblong-ovate. ^Eneous ; antennae piceous, their base and the legs 

 entirely fulvous ; head and thorax coarsely punctate, elytra each 

 with four smooth longitudinal costae, their interstices deeply punc- 

 tate. 



Length 2 lines. 



Hab. Tasmania. 



Head with a deep longitudinal groove in middle, deeply and closely 

 punctured ; labrum fulvous, its base piceous ; palpi testaceous, their 

 apex as well as the mandibles piceous ; antennae about half the 

 length of the body, second and third joints short, of nearly equal 

 length, the seventh to the eleventh joint thickened and cylindrical, 

 piceous or black, five or six basal joints fulvous. Thorax transversely 

 convex, its sides rounded and widened in the middle, posterior margin 

 broadly produced in middle, surface deeply and closely punctured, 

 interrupted here and there by some smooth semielevated spaces, 

 brownish or greenish aeneous. Scutellum as broad as long, in one 

 specimen broader than long, impunctate. Elytra scarcely wider at 

 the base than the thorax, about three times as long, punctured like the 

 thorax, the punctures sometimes confluent and interrupted by four 



50* 



