MEGASCELIS. 55 
fulvous pubescence ; underside clothed with fine silvery pubescence, the abdomen and legs fulvous, the 
breast with a tinge of pale metallic green; claws piceous. 
Hab. Mexico, Panistlahuaca (Sallé). 
Of this rather large-sized Megascelis there are two female specimens before me which 
I cannot satisfactorily identify with any described species of similar size. The very 
finely rugose head and thorax, the dull colour of the upper parts, and the costate 
interstices of the elytra will assist in the determination of I. robusta. 
13. Megascelis tibialis, 
Metallic blue ; above obscure dark green or purplish; the antenne, tibie, and tarsi black. 
Length 2~23 lines. 
Head metallic green or blue, deeply and closely punctured ; the epistome separated by a more or less distinct 
triangular groove, very coarsely rugose-punctate ; labrum testaceous; palpi fulvous; antenne almost 
entirely black, the basal joints sometimes fulvous below ; thorax about one half longer than broad, distinctly 
narrowed below the middle, deeply and closely punctured, the interspaces towards the base transversely 
rugose, the surface clothed with thin fulvous pubescence, and without central ridge; elytra dull greenish 
or purplish, clothed with whitish pubescence, deeply and closely punctured, the interstices transversely 
wrinkled ; underside metallic blue or green; the femora fulvous, the knees, tibiee, and tarsi black. 
Hab. Mexico, Toxpam, Cordova, Orizaba (Sallé), Oaxaca. (Hoge). 
From all the species of the genus, with the exception of two or three, UM. tibialis 
may be known by the metallic underside in connection with the dull coppery or 
greenish colour of the upper surface. From the Brazilian I. ewilis and MW. anguina, 
Lac., the present insect is separated by the black colour of the knees, tibie, and tarsi. 
The four specimens before me show no difference in the above particulars. 
14. Megascelis collaris. 
Fulvous ; the breast black or piceous; head and thorax very finely punctured, the latter deeply transversely 
grooved ; elytra metallic blue, the suture narrowly purplish. 
Var. The elytral suture narrowly fulvous. 
Length 2 lines. 
Hab. GuatEMaLa, Zapote (Champion); NicaRracva, Chontales (Janson); PANAMA, 
Bugaba, Caldera in Chiriqui (Champion). 7 
I can only compare MV. collaris to M. amabilis or M. frenata, Lac., of Colombia, 
with which it agrees in size and, partly, in colour. In the present species the head and 
thorax are fulvous, with a pale metallic green tint; the head is very finely and 
sparingly punctured (in which J. collaris differs from most other known species) ; the 
antenne are black, with two or three of the basal joints fulvous; the thorax is of the 
same colour as the head, rather closely and distinctly punctured at the sides, less closely 
in front, without any transverse rugosities, the anterior portion being rather strongly 
swollen, and bounded behind by a deep transverse depression (in If. amabdilis the thorax 
is of similar colour and punctuation, but the anterior portion is far less strongly deve- 
loped, and the groove is shallower); the elytra are impressed with the usual transverse 
