432 
INSECTA. 
This subgenus consists of five or six species, two of which 
are from New Holland, and the remainder from America* * * § . 
The three first joints of the tarsi in the two following subgenera 
are in the form of a reversed heart, and have no membranous pro- 
longation underneath; the fourth is deeply bilobate; the last, but 
slightly elongated, exhibits no projecting and silky appendage be- 
tween its crotchets. The antennae are filiform, simple, or at most 
pectinated, and never consist of more than eleven joints. 
Ptilodactyla, Illig. — Pyrochroa, De Geer. 
Distinguished by the semi-pectinated, or serrated antennae of the 
males. 
The species of this subgenus are peculiar to America f . 
Dascillus, Lat. — Atopa, Fah. 
Only differs from Ptilodactyla in the antennae, which are simple 
in both sexes j;. 
The remaining Cebrionities have small mandibles which project 
but little, or not at all, beyond the labrum, a generally soft and al- 
most hemispherical or ovoid body, and palpi terminating in a point. 
The antennaj are simple, or but slightly dentated. The posterior 
legs of several are fitted for leaping. They live on aquatic plants. 
In these, the penidtimate joint of the tarsi is bilobate. The second 
and third of the antennae are shorter than the fourth. 
Elodes, Lat. — Cyphon, Fab. Dej. 
The posterior thighs differing but little in thickness from those 
of the preceding subgenus §. 
ScYRTES, Lat. — Cyphon, Fab, 
Thighs of the posterior legs are very large, and the tibiae terminated 
by two stout spurs, one of which is very long, a circumstance which 
enables these Insects to leap. The labial palpi are forked, and the 
first joint of the posterior tarsi is as long as all the others taken 
together ||. 
In those, all the joints of the tarsi are entire. 
Nycteus, Lat. — Hamaxobium, Ziey. — Eucynetus, Schiip. 
The third joint of the antennae very small, and much shorter than 
the second and following one, the last almost granose ; the four tibiae 
* Rhipice7-a mcmjinata, Lat., Cuv., Rt^gn. Anim. Ill; Kirby, Lin. Trans., XII, 
xxi, 3 ; — Poli/toMus marginatus, Dalm., Anal. Entom. p. 22 ; — P.femoi'aius, Id. Ib. 
21 ; — P. mi/sfaciiius, Id. Ib. 22 ; Hispa mpstacina, Fab. ; Drur. Ins. Ill, viii, 7. I 
have seen another species in the collection of Count Dcjean, entirely fulvous, sent 
to him from America by Major Le Conte. 
'|- Ptplodactpla elaterina, Illig.; Pyruclu-oa niticla, De Geer, Ins., V, xiii, 6 — 17. 
J Atopa cerrina, Fab. : A. ciiierea, var., Id. ; Ptiiiiis testaceo-villosus, De Geer, 
IV, ix, 8 ; Cistela cervina, Oliv., Col., Ill, 54, 1, 2, a. 
§ The first division of Cyphon, Fab. 
11 The second division of Cyphon, Fab. See the Catalogue, &c. of Dejean. 
