86 Mr. G. J. Arrow on the Genus Rhysodes. 
elevato lato, ad loborum medium non attingente, supra oculos 
carina levi; prothorace antice semicirculariter arcuato, lateribus 
curvatis, postice paulo contractis, supra eequaliter quadri-costato ; 
elytris striatis, striis valde et confluenter punctatis, humeris 
prominentibus ; prosterno impunctato, epipleuris prothoracicalibus 
irregulariter punctatis, corporis reliquo subtus grosse punctato, 
tibiis anticis apice quadri-spinosis. 
¢, femoribus anticis medio dentatis ; tibiis posticis apice lamella 
spinosa armatis. 
Long. 7°5 mm. 
Hab. Penang. 
The typical specimens, of both sexes, were found by 
Mr. Lamb. ‘The insect very closely resembles 2. nicobar- 
ensis, Grouv., in which, however, the two outer coste of the 
thorax are much narrower than the two inner ones, The 
punctures of the elytra also readily distinguish the two 
species, those of the latter having so completely coalesced 
longitudinally as to be nowhere entirely distinct. 
R. aterrimus, Chevr., which is described from the same 
region, has, if the very loose description can be relied upon 
at all, a very differently formed head to that of the present 
species. 
Rhysodes batchianus, sp. n. 
Niger, nitidus, parum elongatus, capitis lobis fortiter emarginatis, 
antice paululo convergentibus, spatio mediano postice valde dila- 
tato, fere ad loborum medium attingente, supra oculos carina levi; 
thoracis lateribus leviter curvatis, postice perpaulum contractis, 
dorso subeequaliter quadri-costato, costis internis medio valde dila- 
tatis; elytris conjunctim in latitudine ad thoracem equalibus, 
fortiter striato-punctatis ; corpore subtus grosse punctato, pro- 
sterno epipleurisque prothoracicalibus impunctatis, metasterno 
medio excavato, 
Long. 7°5 mm. 
Hab. Batchian. 
I do not know the male of this species, but its distinctive 
characters are no doubt the same as in the preceding one, to 
which 2. butchianus is closely allied. It is much less attenu- 
ated, however, and the two inner coste of the prothorax are 
thicker in the middle. Similarly, the two outer coste are 
thicker than the corresponding parts of R nicobarensis. 
Rhysodes malubaricus, sp. n. 
Niger, nitidus, capite longitudine ad latitudinem wquali, lobis promi- 
nentibus, extus paulo planatis, vertice fere circulariter perforato, 
