106 
Mr. Charles J. Gahan on the 
89. Perihoeum insulanum, sp. n. 
Reddish-testaceous and nitid ; elytra pale yellowish-testaceous 
and also nitid. Prothorax minutely and very sparsely punctured, 
each of the punctures carrying a rather long erect hair; with a 
slight tuberosity on the middle of each side ; with three very 
slightly raised tubercles on the disk, immediately in front of the 
basal transverse groove, of which the middle one is larger and 
somewhat oblong in shape. Elytra distinctly but somewhat 
sparingly punctured ; each terminated at the apex in two spines — a 
very short one at the suture, and a somewhat longer one on the 
outside. Posterior femora bidentate at the apex, femora of the 
two anterior pairs unarmed. Antennae sparsely ciliate, with the 
first joint reddish and nitid, the succeeding joints faintly pubescent, 
those from the third to the eighth armed at the postero-distal angle 
with a sharp spine. Long. 11, lat. 2^ mm. 
Hah. Jamaica (Cockerell). 
This species resembles Periboeum fragile, Bates, but 
the form of the prothorax is dijfferent, the elytra are not 
tipped with black, and their external apical spines are 
shorter, as are also those of the posterior femora. 
90. Periboeum insulare, White. 
Sphaerion insulare, White, Cat. Col. B. M. Longic, 
p. 109 (1851). 
Hab. Jamaica (Gosse). 
Entirely testaceous, with ithe elytra and legs slightly paler in 
tint than the other parts. Prothorax somewhat rounded at the 
sides, closely alveolate-punctate. Elytra strongly and very closely 
punctured, except on the posterior fourth or fifth ; each bispinose 
at the apex. Antennae neither carinate nor grooved, but slightly 
flattened above ; joints 3rd to 7th or 8th each armed with a spine 
at postero-distal end. Femora unarmed at the apex, tibias without 
carinas. 
From the above characters it will be seen that this 
species occupies a somewhat doubtful position in the 
genus Periboeum. I should be inclined to place it in 
Elaphidion (section Hypermallus), were it not for its 
colour and general facies, which are very suggestive of 
the present group. 
