44 
INSECTA SAUNDERSIANA. 
IV. Antennae $ ut in Sect. II. et III. Elytra aut late sed parum, aut 
obsolete deplanata, postice circulariter declivia, callo ante-apicali 
aut obsoleto aut nullo. Tibiae ut in Sect. II. et III. Articuli 
duo basales tarsorum ut in Sect. III.— Pt. antiquus, Kl.; Pt. 
obsoletus , Jekel; Pt. viridanus, Sch. 
V. Antennae $ ut in Sect. I. Elytra convexa, supra haud impressa, 
postice circulariter declivia, callo nullo.— Pt. virgatus, Sell. 
As may be seen, from the characters here above detailed, the first two 
divisions contain the most depressed species, and the three others the most 
convex, scarcely depressed in the elytra (except Pt. antiquus, in which the 
depression approaches that of Pt. elongatus and its allies, but with the 
ante-apical callosity nearly obsolete); and the last species, Pt. virgatus, 
one of the least depressed, without callosities, leads again to the Pt. depres- 
sus in the structure of the antennae in the male. 
Ptychoderes depressus, Jekel. 
Modice elongatus, crassiusculus, supra valde lateque depressus; niger, 
iomento infra albido-Jlavescente , dorso thoracis elytrorumque in vitta 
latissima parum sinuata dense albido-Jlavescente, lateribus fusco tec- 
tus; maculis punctisque ordinariis thoracis dilute fuscis; rostro 
crassiusculo, parum elongato; capite breviusculo ; oculis oblongis, 
parum convexis; thorace latiusculo, longitudine parum angustiore, 
lateribus paullo rotundato, carina postica parum sinuata, medio an- 
guste interrupta ; scutello transversim subovato ; elytris basi singula- 
tim obtuse rotundatis, margine cequali subpiano , ad humeros obliquos 
thorace parum latioribus, lateribus versus apicem sat angustatis 
(preesertim in <£), disco supra valde depressis, ante callum sat oblique 
declivibus, seriato setosis, callo apicali obtuso, basi parum lato, libel- 
lam perpendicularem apicis suboblique truncati non attingente. 
$ Majores: Antennis crassis, corpore multo longioribus, articulis tetra- 
gonis, longitudinaliter canaliculatis, apice valde subglobosim cla- 
vatis, primo clavce apice ultimisque toto subtus pilosis. 
$ Dimidio minores: Antennis apicem elytrorum non attingentibus. 
^ Antennis crassis (pro ratione ), medium thoracis superantibus, articulis 
haud tetragonis, obsolete canaliculatis, clava crass a, elongata , arti- 
culo ultimo ante apicem extus emarginato, apice acuto. 
