56 PHYTOPHAGA.—SUPPLEMENT. 
rugosities, and punctured on the interstices, sparingly clothed with fulvous pubescence, 
and generally of a dark metallic-blue colour, with the sutural and lateral margins 
narrowly purplish. In some specimens all the colours are paler, but perfectly recog- 
nizable. Usually the underside, as well as the legs, is fulvous, and the breast nearly 
black ; in one or two examples, however, the underside is altogether darker. M. frenata 
has the elytra similarly coloured, except that the suture is more broadly purplish; and 
the thorax much longer and with a less distinct transverse groove. The variety only 
differs in colour ; it is from Chontales. 
15. Megascelis championi. 
Pale testaceous ; above pale metallic green; head remotely, the thorax more closely, punctured ; the latter 
strongly narrowed posteriorly, and with a distinct transverse groove; elytra sparingly pubescent, the 
suture pale testaceous, the basal and lateral margins purplish or blue. 
Length 14-2 lines. 
Hab. Guarema.a, Zapote (Champion) ; Panama, Caldera in Chiriqui (Champion). 
The general colour of the upper surface is similar to that of IZ. quadrisignata, except 
that there are no spots, a pale metallic green covering a testaceous ground-colour ; the 
head is remotely punctured, and the punctures are much deeper anteriorly than at the 
base (the distant punctuation is therefore one of the characters by which M/. championi 
may be known from most of its allies); the thorax is not longer than broad, more 
closely punctured than the head, almost without transverse wrinkles, the surface of the 
same testaceous colour as the head, with a similar pale green metallic gloss, and with 
a distinct transverse groove; the scutellum is also of the same colour as the thorax ; 
the elytra are of a brighter metallic green, the basal and the lateral margins more or 
less distinctly blue or purplish and the suture pale fulvous or testaceous, and the punctua- 
tion is distinct and less interrupted by transverse strigee than usual ; and the antenne are 
black, with pale basal and (in one specimen) apical joints. MU. championi resembles in 
the shape, colour, and punctuation of the thorax MV. collaris ; and it is quite possible 
that the former is only a pale variety of the last-named species. I have, however, three 
specimens before me which agree with each other in the colour of the elytra (it is dark 
blue in I. collaris); and in the absence of intermediate specimens I cannot look upon 
them as varieties. 
16. Megascelis quadrisignata. 
Testaceous or fulvous; above pale metallic greenish ; thorax closely punctured, with a raised longitudinal 
central line; elytra covered with very short pubescence, each with a spot at the base and another below 
the middle purplish-blue. 
Length 14 line. , 
Head not very closely but distinctly punctured, light metallic green ; antenne black, the four basal joints 
testaceous ; thorax not longer than broad, widened at the middle, with a transverse central depression, 
closely punctured, without transverse strige, the disc with a central longitudinal ridge, the punctures 
larger anteriorly than at the base; scutellum deeply punctured ; elytra with the usual transverse strige, 
