70 i MARTIN JACOBY 
The open coxal cavities, bifid claws, unarmed apices of the 
tibiae together with the shape and impressed surface of the 
thorax leave little doubt that the present species must be pla- 
ced in Momoea. From M. viridipennis Baly a closely allied species, 
it differs in the colour of the underside and legs and that of 
the margin of the elytra as well as in the general smaller size. 
42. Sastra placida, Baty. 
dg. Thorax produced into a strong tooth at the sides. 
Var. Elytra entirely greenish fuscous; legs and antennae 
black, the three apical joints of the latter, fulvous. 
Hab. New Guinea, Fly River (L. M. D'Albertis). 
This seems to be a most variable species and I do not think 
to err when I consider all the specimens before me, obtained 
at the same locality as varieties. It seems that all the specimens 
without the produced lateral tooth of the thorax and which 
includes the type, which I was enabled to examine through the 
kindness of M." Baly, must be considered the females, which 
may be further known by the smaller head and eyes and the 
shorter antennae; these differ again amongst themselves greatly 
in regard to colour. In the typical form the elytra are obscure 
pale fulvous, finely pubescent and punctured and the base and 
sides of the elytra to a greater or smaller degree are slightly 
metallic green. In the insect which I look upon as the male 
but which may possibly belong to another species, the elytra 
are pale fuscous with the base of a slight metallic green tint 
and each elytron has two distinct longitudinal costae at the 
sides which are joined at the shoulder (these costae are not so 
distinct in the females but vary in degree) other structural 
differences I am not able to find. In all, the third joint of the 
antennae is very long and the claws are bifid; the punctuation 
of the head and thorax is equally variable as well as the colour 
which varies from testaceous to fulvous and fuscous. 
