58 
INSECTA SAUNDERSIANA. 
Head transverse, short behind the eyes, its three frontal ridges very 
distinct in the males, obsolete in the females, clothed, like the rostrum, 
with reddish fulvous tomentosity. Rostrum rather narrow at the base, in 
the males rather dilated at the apex, in the females somewhat more so, 
much shorter, as well as the head, in proportion to that of the already- 
described species, not twice as long as wide in the most developed males, 
in the females not more than one-lialf longer; its three dorsal ridges are 
most elevated and not thin in the males, but less indicated in the females ; 
antennal groove obsoletely obliquely continued beneath. 
Thorax longer than broad ; sides a little rounded, disc subovalely 
depressed, area circumscribing that depression elevated, transversely ru- 
gulose, especially in the males; posterior carina rather distant from the 
base, scarcely interrupted in the middle, slightly sinuate. 
Scutellum subquadrangular, scarcely transverse. 
Elytra shortly oblong-parallel, subemarginately truncate at the base, 
with the margin somewhat reflected in the middle; widened from the 
posterior angles of the thorax very slightly and obliquely to the shoulders, 
which are obtusely angular; sides straight for four-fifths of their length, 
then semicircularly narrowed to the apex ; convex, narrowly depressed 
longitudinally along the suture, the depression obsolete posteriorly, circum¬ 
scribed anteriorly by a subcostiform convexity reaching two-thirds of the 
length, placed inside of the third stria, better indicated and subrugose in 
the males; all the other interstices flat, anteriorly transversely rugulose : 
longitudinally they are elevated behind the base, then nearly straight to 
three-fourths of the length, subsequently rather obliquely subcircularly 
depressed to the apex; ante-apical callosity short, and far from attaining 
the perpendicular level of the apex. 
.Coloration of a silky white beneath ; the common band of the disc of 
the elytra absolutely circumscribed laterally, of a dull fulvescent hue, 
mixed with brown fuscous dots: its median emargination smaller than in 
the other species already described, submaculiform, of a darker fuscous 
than the sides, which are fulvescent, or at least densely mixed with that 
colour, so as to be scarcely darker than the discoidal band. The coloration 
of the depressed part of the disc is of a more uniform fulvescent hue, but 
less reddish and dense than on the head and rostrum. 
Obs .—This species leads very well to those which are scarcely callose 
at the apex of the elytra. It closely resembles the Pt. virgatus , and has 
been confounded with it in some collections, but the presence of the apical 
