388 
Rev. T. A. Marshall's Monograph of 
The two first- genera are distinct and natural^ although 
Ejpimicta contains only a single species ; the eight 
following are more artificial_, but as they seem likely to 
facilitate the determination of species, I have allowed them 
to remain. They may be distributed into three natural 
groups; 1. Dacnusa (G. iii., iv.) ; 2. Gyrocampa (G. v., 
vii.) ; and 3. Coelinius (G. viii,, ix., x.). Gyrocampa, 
Chorehus, and Ghsenusa are very closely allied both in 
form and habits ; Chsenon and Coelinius are in all essen- 
tial particulars the same, and may be optionally regarded 
as synonyms, which indeed they originally were. 
Porster has much increased the number of generic 
names by commencing the dismemberment of the great 
genus Dacnusa, but he has left untouched the majority 
of the species. 
i. (Enone, Haliday. 
Hal., Hym. Brit., ii., 3 (1839). 
Head broad, transverse ; front very short ; eyes naked ; clypeus 
somewhat semicircular, or obtusely triangular ; mandibles quad- 
ridentate, the 2nd tooth the longest, the 4th the smallest ; maxil- 
lary palpi 6-, labial 4- jointed. Postscutellum armed with a denti- 
form spine. Stigma oval-lanceolate, more or less short, emitting 
the radial nervure from the middle, or from just before the 
middle ; radial areolet lanceolate, remote from the tip of the wing ; 
recurrent nervure slightly rejected. Abdomen subsessile, oval, as 
broad as the thorax, entirely or in great part covered with longitu- 
dinal stri« ; segments 2-3 indiscrete, forming with the 1st a sort 
of carapace which conceals all the following segments, or these if 
visible are extremely short ; belly concave ; terebra concealed. 
The length of the antennae is the readiest means of distinguishing 
the sexes. 
Nees von Esenbeck was acquainted with two species, 
which he formed into a section of Sigalphus; their 
resemblance to that genus is very striking, but the 
structure of the mandibles shows them to belong to the 
Exodontes. Forster changed the name CEnone to Sym- 
phya, but without stating his reasons for so doing ; 
CEnone occurs as a specific name in Lepidoptera, but I 
cannot find any instance of a genus so called. Dahlbom, 
in his Monograph of Chelotius (Sv. Ak. Handl., 1833, 
p. 159), described a species pullatus, having only two 
