70 
INSECTA SAUNDERSIANA. 
(when seen from above) to be quadrangularly truncate behind. This cha¬ 
racter is peculiar to this species amongst the elongated American forms 
which we could call Ptycho'deridee. 
II. Antennae $ corpore dimidio longiores, articulis tenuibus, succes¬ 
sive crassitudine decrescentibus, cylindricis, apice clavatis ; clava 
angustissima, elongatissima, articulo ultimo acutissimo, primo 
longiore; $ thoracis basin subattingentes, crassiusculi, clava 
latiuscula, elougato-acuta, articulo ultimo primo longiore, sub- 
recto, acuto. Thorax latiusculus, subconicus, h. e. ab apice ad 
canuam posticam subsinuatim ampliatus, latitudine non longior; 
mox pone apicem transversim—ante basin late—modice impres- 
sus ; carina postica alte elevata, medio non interrupta, versus 
latera parum oblique antrorsum ducta, lateraliter valde subacute 
producta et abrupte terminata. Elytra subparallela, medio 
disci longitudinaliter parum impressa, singulo infra basin callo 
integro alteroque ante apicem rnimito duplicato instructo, pone 
callum suboblique declivi, apice emarginato, angulo suturali 
spiniformi. Processus scutellaris mesosterni inter coxas inter- 
medias simplex. — Ectatotropis, Jekel. A EfiTcxro^ extensus, 
TgoTTig, carina. 
Typus : Phlceotragus conicollis , Jekel in litt. 
Congen.: Phlceotragus punctulatus , Dupont in litt. 
Ohs .—The type of this group approaches much nearer, in the slight 
depression of its elytra and the minute callosity of their hinder part, to Pt- 
viridanus than the two preceding genera, of which it has also the coloration 
and maculation. The congeneric species presents all the characters of the 
type, and renders the group homogenous. It is coloured like Pt. mixtus 
and virgatus , to which it has a striking resemblance. 
III. Antennce $ corpore auk sub- aut plus-dimidio longiores, 9 
elytris basin multo superantes. Caput cum rostro quam in pri¬ 
ced entibus magis elongatum angustatumque, carina in fronte 
magis elevata. Thorax angustus, medio lateribus parum am- 
pliatis, latitudine media multo longior, mox intra apicem trans¬ 
versim — ante basin late — modice impressus, cum carina media 
longitudinali brevissima; carina postica medio aut non, aut late 
interrupta, sed versus lateres valde oblique antrorsum ducta, 
