12-2 
ARCANA NATURÆ 
body of Cardiophorus; Aplastus resombles entirely a slender Corymbites, and has long, serrale 
11-jointed antennæ; Plastocerus has the antennæ 11-jointed and strongly pectinate, and the female 
not very different in form from the male; Euthysanius has the antennæ 12-jointed, but otherwise is 
similar in form to Plastocerus ; but the female has a very long abdomen, no wings, and short elytra 
obliquely truncated at the tip, only covering the base of the abdomen; the antennæ are 12-jointed 
and only serrate in that sex. 
SCHIZOPUS, Lee. 
Antennæ, ll-articulatœ, articulis 5 — 10 latioribus triangularibus , 11 mo ovato; clypeus minutas in 
fronte emarginata receptus, labrum majusculum antice subemarginatum, mandibulæ ernarginatæ. 
Mentum trapezoideum transversum (ligula brevis, transversa, coriacea, palpis deficientibus); palpi 
maxillares brèves cylindrici, articulis subœqualibus ; oculi médiocres ovales. Coxœ anticœ magnæ trans- 
versæ, conicæ, trochantino nullo ; mediœ eis approximatif majusculæ distantes; tarsi tibiis breviores, 
articulis 1 — 3 subtus breviter, 4 to autem longe bilobatis , ultimo prœcedentes très longitudine œquante, 
unguibus ad apicem fissis. Abdomen articulis duobus primis arcte connatis, 5 to emarginato, 6 to promi- 
nulo valdee marginato, 'Imo minuto parum conspicuo. 
A remarkable genus, winch by its form and color recalls certain Gallerucites of the family Chryso- 
melidæ, while the structure of the abdomen is equally suggestive of Psephenus. The head is small ; 
the thorax is gradually narrowed in front, closely applied to the elytra, and slightly sinuate at base. 
The scutel is trilobed, with the middle lobe produced into a point. The elytra are wider than the 
thorax, oblong, rounded at the tip, coarsely but densely punctured. The legs are moderate ; the an- 
terior tibiæ are terminated by very short spurs, but I can see none on the middle or posterior tibiæ. 
The anterior coxæ are large, leaving only a very short prosternum, which extends between them, and 
abuts against the declivous mesosternum; the metasternum is short and fiat, forming an angle with 
the mesosternum, which widely séparâtes the middle coxæ; the episterna of the metathorax are fiat, 
broad, and project in front ; the posterior coxæ are suddenly dilated internally, truncate at tip, with 
the inner margin oblique; their anterior niargin is curved, with the concavity forwards, and the me- 
sosternum is sculptured with a line parallel to this margin. The joints of the abdomen are nearly equal 
in length-, the first and second are connate; the third and fifth are a little shorter than the fourth ; the 
sixth is deeply emarginate, very small, and is visible only within the emargination of the fifth. The epi- 
pleuræ are obsolète behind. 
It will appear from the assemblage of characters detailed, that this genus will be properly enrolled 
as a new family, Schizopodidœ, to be placed between Dascyllidœ and Cyplionidæ, completing the line 
of affinities manifested by the Parnidœ, through Psephenus, a genus of the Atlantic States, with the 
serricorn type of Coleoptera in the two families named above. 
2. S. Lætls, oblongus, viridi-œneus, subtilité r albo-pubescens, capite thoraeeque confertissime scabro- 
punctatis, hoc convexo canaliculato, latitudine duplobreviore, antrorsum angustato, lateribus late rotun- 
datis et late præcipue postice subdepressis ; elytris lœte sanguineo-rufis, confertim minus subtiliter rugose 
punctatis, et subtilius parce punctatis, sutura viridi-œnea; tibiis tarsisque testaceis, antennis fuscis ad 
basin testaceis, articulo imo viridi-œneo. — Long., 16 1/2 mill. — Tab. XIII, fig. 4. 
Leconte, Proceedings of the Academy ofNatural Sciences of Philadelphia, 1858, p. 71. One specimen 
from Arizona ; habits unknown. 
ENDEODES, Lee. 
3. E. basalis, opacus, sanguineus, brevissime pubescens, capite fusco, thorace latitudine longiore, pos - 
