90 MARTIN JACOBY 
The colour of the antennae, the rounded sides of the thorax 
and the nearly impunctate elytra distinguish this species from 
the preceding ; the numerous specimens obtained show however 
a good deal of variation in one way or other, and those from 
Yule island differ in the fulvous underside but not in any 
other way. 
Hemistus, n. gen. 
Body ovate, rounded, convex; antennae filiform; palpi robust, 
incrassate; thorax transverse, narrow, the sides strongly rounded, 
the surface convex; scutellum broadly trigonate; elytra strongly 
deflexed posteriorly, confusely punctured, their-epipleurae broad, 
continued to the apices; tibiae unarmed; the first joint of the 
posterior tarsi as long as the two following joints together ; 
claws appendiculate; prosternum very narrow; the anterior 
coxal cavities open. 
The genus, here proposed resembles in general shape and 
colour Emathea Baly but differs greatly in regard to structural 
details from that genus; the open coxal cavities, unarmed tibiae 
and appendiculate claws would place the genus in Chapuis’ 
Mimastrinae with which in general outline it has little in common; 
the thorax especially is of peculiar shape on account of the 
strongly rounded sides and the robust palpi is a further character 
of distinction in Hemistus. 
10. Hemistus submetallicus, n. sp. 
Fulvous; terminal joints of the antennae, black; head and 
thorax impunctate ; elytra metallic dark blue, very finely and 
closely punctured. 
Length 3 lines. 
Head not longer than broad, impunctate; the frontal tubercles 
distinct and transverse, bounded behind by a deep groove; an- 
tennae half the length of the body, black, the three or four 
basal joints fulvous, the third and following joints nearly equal; 
