336 Mc. O. Waterhouse on 
To complete this paper I subjoin the following species, 
collected by Dr. Hooker and Mr. T. Havers:— 
Iydromedion elongatum, var. 
In the British Museum there are three specimens which 
differ from the species which I have named J/. elongatum 
in being rather smaller, testaceous, relatively shorter, and 
having the elytra less ‘strongly punctured, ‘the strix not 
impressed. These may prove to belong to a distinct 
species, but I prefer at present considering them a variety 
of the above named. 
Hab.—Straits of Magellan (Dr. Hooker). 
Hydromedion variegatum, sp. Nov. 
Precedenti affine ; minus convexum, testaceum, fusco- 
variegatum, antennis tibiisque fusco-annulatis. Capite 
post oculos rotundato-angustato. Elytris sat fortiter sub- 
seriatim punctatis, marginibus reflexis. 
Long. 33—4i lin. 
I am chiefly induced to give this the rank of a species 
on account of the form of the head. In /Z. elongatum 
the head behind the eyes has the sides parallel, so that the 
eyes do not project ; in the present insect the head is con- 
tracted behind the eyes so as to leave them prominent. 
The thorax is less convex, and has the lateral margins 
distinct. The elytra are relatively shorter, less convex, 
not strongly punctured, and the margins are gently 
reflexed. The apical half of each joint of the antennz 
and tarsi is fuscous, and the tibiz are ringed with the 
same colour. 
Hab.—Straits of Magellan (Dr. Hooker and Capt. 
Ross). Brit. Mus. 
Parahelops Haversti, sp. 0. 
Ovalis, brunneo-testaceus, nitidus, convexiusculus, 
Capite creberrime subtiliter punctulato ; oculis promi- 
nentibus. Thorace capite duplo latiori, longitudine 
1 Jatiori, leviter convexo, ereberrime distincte punctulato, 
antice posticeque fere recte truncato, angulis rotundatis, 
lateribus leviter rotundatis, marginibus reflexis. Scutello 
transverso, crebre punctulato.. LElytris thorace paulo 
