548 CUCUJIDA. 
This species differs from P. mexicanus by the more elongate thorax, which also is 
less distinctly denticulate at the sides, and by the greater sexual disparity. The male 
has the hind legs longer, their dilated tarsal joints very considerably longer ; the female 
is duller, and the punctuation of the elytra is much finer than it isin the male. The 
species varies in colour, but in the specimens that are quite black above the ventral 
segments are ferruginous. Six examples are before me. 
8. Platamus difficilis, sp. n. 
Depressus, niger vel piceus, pube erecta ad latera crebrius vestitus ; prothorace elongato, crebre punctato, ad 
latera denticulato ; elytris fortiter seriatim punctatis. 
Long. 7 millim. 
Hab. Guatemata, Volcan de Agua 8500 to 10,500 feet (Champion). 
We have received only one pair of this species, which after comparison | am not 
able to consider a variety of either of the other forms here described. It is separated 
from P. mexicanus and P. grouvellei by the more abundant pubescence at the sides of 
the elytra; from P. uniformis by the shorter joints of the male feet, and by the fact 
that the elytra of the female are dull. From P. dispar it differs by the closer 
punctuation of the thorax and the much less obliterated sculpture of the wing-cases 
of the female. 
The sides of the thorax are distinctly denticulate, the lateral margin at the front 
angle not incrassate. ‘The wing-cases in the female are dull, and their punctures are 
somewhat smaller than those of the male. The length of the dilated joints of the male 
feet is about the same as in P. mexicanus, but the tibie are longer and much more 
pubescent. 
4. Platamus uniformis, sp. n. 
‘Elongatus, depressus, niger, nitidus, pube erecta ad latera crebrius vestitus; prothorace elongato, crebrius 
fortiter punctato, ad latera obtuse denticulato; elytris fortiter seriatim punctatis. 
Long. 63-7 millim. 
Hab. Guatemata, Capetillo (Champion). 
Antenne elongate, setose, piceous-black, ferruginous towards the extremity. Thorax 
more closely punctate than in the other species of the genus, elongate. The elytra 
are elongate, and the punctures are coarser than they are in P. growvellei, but become 
fine and obsolete at the tip. The dilated joints of the male hind foot are not elongate ; 
there is but little difference in sculpture between the sexes. 
We have received seven examples of this species, one only of which isa male. ‘The 
difference in the sculpture of the elytra of the two sexes is less than it is in either of 
our other species. The male may be readily distinguished from that of P. growvellei 
by the shorter dilated joints of the feet, and the female may be identified by the shining 
