COLEpPTERA. 
67 
A Antennas basin elytrorum super antibus, nigris , articulo 8 o funiculi 
primoque claves fere toto dense niveo-tomentosis. 
$ Mi hi incognita. 
Longit. (rostr. inch) 6| lin. = 14 T | millim. 
Latit. hum. If lin. = 3 T 4 g millim. 
Patria : Amazona : Dom. Bates (D. Stevens). 
This species is extremely close to Pt. annulicornis , Sch., and has pro¬ 
bably been confounded with it, for the only specimen which I have seen I 
found amongst duplicates bought from Mr. Stevens, and I have seen none 
in the collection of Mr. Saunders. The specimen being smaller than the 
most minute of the males of Pt. annulicornis, and seeming at a first glance 
spoiled or rubbed, this fact is not surprising. Nevertheless, from the in¬ 
spection of a single specimen, I regard it as a distinct species, and 
as a male. 
It is smaller than the smallest males of the above-named species, 
and proportionally much narrower. The eyes have their inner border not 
straightly, but somewhat roundly approaching on the forehead, so as 
to render it more narrowed at the base, less conic, though yet narrower at 
the apex : they certainly appear broader on the upper side. The thorax is 
proportionally much narrower and longer, and especially its sides are 
scarcely dilated behind the middle, where they are scarcely wider than the 
base : this last character is very evident. The elytra , proportionally much 
narrower and longer, are extremely straightly truncate at their base, very 
thinly and regularly margined, whilst they are in both cases more or less 
irregular in Pt. annulicornis. Their shoulders are much more, and 
extremely, oblique and obsolete, scarcely dilating the elytra behind the 
base ; their sides are yet more parallel; their dorsal depression is very shal¬ 
low, and they are longitudinally less elevated behind the base, when seen 
in profile, and less concavely depressed behind that elevation, and their 
posterior declivity is much slighter, without the least appearance of 
callosity. 
The coloration, though different, would not have been a sufficiently 
distinctive character, if it had not been accompanied by the preceding dif¬ 
ferences. It is of a fulvous olivaceous hue, having on the pectus and the 
basal segment of the abdomen and the apex of the elytra a cinnabarine 
tint, which I have never seen amongst the numerous specimens I have 
seen of Pt. annulicornis. The black subdenudate quad rangularly placed 
