64 
INSECTA SAUNDERSIANA. 
shortest species (like Pt. callosus). The rostrum is the shortest and broadest 
in the genus, that of the most developed males being shorter and broader 
than that of the female of Pt. elongatus and its allies. The coloration, the 
want of apical callosities, and the good description of M. Boheman in Seh. 
loc. cit., render further details needless. 
Found by Mr. Bates on felled trees. 
* Ptychoderes virgatus, Sch. 
Sat elongatus , supra late sed leviter deplanatus, lateribus infraque con ~ 
vexiusculus , nigro-piceus, tomento infra albido-subvirescente i in dorso 
thoracis elytrorumque albescente , lateribus brunneo-ferrugineo tecius ; 
maculis punctisque ordinariis disci obsolete brunneis ; rostro angusto , 
parum elongato , basi transversim impresso; capite angusto , pone 
oculos paullo extenso , in fronte per oculos conico-angustato convexius- 
culo; thorace latitudine evidenter longiore , lateribus pone apicem 
subtubulatum sat abrupte ampliato , versus carinam posticam hand 
rotundatim paullo ampliato , hac parum sinuata , medio baud in- 
terrupta , basi subparallela , h. e. versus latera parum antrorsum 
directa ; scutello transverso-subquadrato ; elytris subparallelis , versus 
apicem in $ parum , in 2 haud angustatis , basi truncatis , margine 
subplanis , pro humeris parum obliquis obtuse rotundatis paullo 
ampliatis; postice semicirculariter declivilus , callo apicali nullo. 
$ Antennis longitudine corporis , crassissimis , articulis tetragonis , canali- 
culatis , linearibus , apiee breviter parumque clavatis , clava valde 
elongata , angusla , articulo \mo canaliculato , piano , prcecedenti 
parum , sequentibus simul longiore , ultimo subacuto (Schon. ignot.) 
2 Antennis apicem thoracis haud attingentibus , pro ratione sexus sat 
crassoc , cfom latiore , articulo lmo multo breviore quam in $ , 
sequentibus suboeque longis. 
Longit. (rostr. inch) 8f—9 lin. = 14—15 millim. 
Latit. hum. 2|—2^ lin. = 4 T |—5 millim. 
Ptych. virgatus, #cA. Gera. &/?. Crarc, t. v. pars i. pag. 157 (e.rch 
synon. 
Patria: Cayenna. 
