from Lizard Island, North-eastern Australia. 463 
Fam. Helopide. 
Omolipus socius. 
O. ater, nitidus ; elytris seriato-punctatis, his prothoracis basi latiori- 
bus; antennis tarsisque concoloribus. 
Deep glossy black; head and prothorax very minutely punc- 
tured; elytra rather broader than the prothorax at the base, 
each with about nine rows of deeply-impressed, rather distant 
punctures, those of the two nearest the suture smaller; antennze 
and legs black, shining ; tibize at the base and tarsi clothed with 
fulvous hairs. Length 5 lines. 
Nearly allied to Omolipus corvus, Pasc. (Journ. of Entomol. i. 
p- 127), but with the prothorax broader and less contracted at 
the base, yet narrower than the base of the elytra, the humeral 
angles more obvious, and the punctures less deeply impressed, 
especially on the two sutural rows; the antenne and tarsi are 
also destitute of the brownish hue of the former species. 
Chariotheca amaroides. 
C. latiuscula, atra; prothorace subquadrato, lateribus marginatis ; 
elytris ovatis, cupreis. 
Rather broad and robust for this genus, smooth, glossy black; 
head with a few coarse punctures between the eyes; lip nearly 
hidden ; antennze scarcely longer than the breadth of the head ; 
prothorax very minutely punctured, transversely subquadrate, 
narrowly margined, the sides rounded anteriorly, but curving 
inwards towards the base ; elytra ovate, seriato-punctate, copper- 
brown (but under the lens they are seen to be mottled with 
metallic green) ; legs and body beneath glossy black. Length 
6 lines. 
In its form this Helopian resembles some species of Amara or 
Zabrus ; except that the upper lip is less exposed, I see nothing 
to distinguish it from Chariotheca. 
Tragocerus formosus. 
T. flavo-luteus, pilis brevibus suberectis vestitus; elytris fasciatis, 
singulatim tricarinatis, carina suturali abbreviata, apice sinuatis. 
Luteous, covered with short, coarse, nearly erect hairs ; head 
with a short impressed line between the eyes; antenne about 
half the length of the body, covered with a fulvous pile; pro- 
thorax unarmed, slightly narrowed in front, curved inwards at 
the side near the base, the disk dark glossy brown, surrounded 
by coarse fulvous hairs; scutellum triangular, smooth, dark 
brown ; elytra elongate, each with three prominent carine, the 
outer extending from the base to the apex, the second nearly as 
long, the inner one only about half the length, the apex sinuated, 
