46 
INSECTA SAUNDERSLANA. 
Obs .—The tetragonal form of the joints of the antennae in the male is 
the only point of connection between this species and Pt. viridanus , Sch.; 
its general shape and coloration, and especially the extreme depression of 
the disc, place it much better with Pt. elongatus and its allies. I have 
seen but few specimens of this curious species. 
Ptyghoderes elongatus, Germ., Sch. 
Maxime elongatus , valde deplanatus , niger, tomento infra subcretaceo 
albido-flavescente, dorso thoracis elytrorumque in vitta lata communi 
irregulari, determinata albido-flavescente, lateribus fusco tectus; 
maculis punctisque ordinariis disci fuscis ; rostro capiteque longiori - 
bus, hoc pone oculos valde extenso ; thorace pro ratione generis elon- 
gato angustoque , latitudine multo longiore, lateribus ante apicem 
ampliato, obtuse rotundato, carina postica medio late interrupta, 
utrinque dor si arcuata, disco valde impresso ; scutello transversim 
oblongo; elytris elongatis, versus apicem magis angustatis, basi singu- 
latim obtusissime rotundatis, aut conjunctim emarginatis margine 
deplanato, medio lato, humeris haud obliquis , obtusis, supra late de- 
planaiis, longitrorsum rectim horizontalibus , posterius ante callum 
parum declivibus , callo ante-apicali basi lato , conico,libellam perpen- 
dicularem apicis deflexo-perpendiculari saltern attingente (in $ major, 
superante). 
$ Majores: Magis conici deplanatique; rostro magis elongato; antennis 
longitudine fere corporis, sat crassis, articulis subcylindricis , apice 
paullo clavatis. 
$ Minores: Duplo imo triploque minores, minus conici deplanatique ; 
rostro minus elongato; antennis longitudine variabilibus, in mi- 
noribus thoracis basin haud superaniibus. 
9 Magnitudinis minus variabiles, aut majores aut mediocres; antennis 
thoracis medium parum superantibus, clava laliore brevioreque 
quam in $ minimis. 
Longit. (rostr. inch) 7—12^ lin. = 15^—28 millim. 
Latit. hum. If—2f lin. = 3 7 |—6 millim. 
This species, the most common in our collections, seems to be widely 
distributed in the South-American continent, extending from the most 
