96 
Mr. A. G. Butler on the 
Streptostele simplex . 
Testa subulata, tenuis, imperforata, cereo-alba ; anfractus 9, apicales 
laeves, cseteri convexiusculi, sutura obliqua profunda discreti, lon- 
gitudinaliter confertim striati ; apex obtusus, globosus ; apertura 
parva, longit. totius | vix aequans, subquadrata ; perisfc. haud 
incrassatum, antice leviter expansum ; columella subrecta, reflexa. 
Longit. millim., diam. 2 ; apertura 2 longa. 
This species has rather convex whorls, is finely striated, 
and has a deepish suture. The outer lip is scarcely thick- 
ened and does not exhibit the sinus at the upper part which 
is characteristic of the genus. In form and general appear- 
ance, however, it agrees very well with the type of the group, 
8. fastigiata , Morelet. It also bears some resemblance to S. 
Buchholzi of Martens, from the Cameroons, but is considerably 
smaller, and has shorter and rather more convex whorls. 
VIII. — Notes on the Genus Dyschorista, Led ., a small Group 
of Moths allied to Orthosia. By A. G, Butler. 
The genus Dyschorista was founded for the reception of two 
European species, D. suspecta , Hiibn., and D. ypsilon=fssi - 
puncta , Hew. (see Lederer, Noct. p. 143, gen. 82). 
Accepting D . suspecta as type of the genus, it will be neces- 
sary to include the bulk of the forms referred by M. Guenee 
to his previously characterized genus Orthodes . 
Ortliodes , Guenee, was described in the first volume of the 
c Noctuelites,’ p. 371, no type being indicated; but Guenee 
selected two of the species, 0 . t-nigrum and 0. curvirena 
(both Brazilian), for illustration. In the description of the 
species of his second group Guenee pointed out that 0. cur- 
virena differed structurally from the remainder of the genus: — 
a L’une d^elles ( Curvirena ) a les palpes particulihrement 
ascendants et allonges.” He thus restricted the identification 
of his type to 0. t-nigrum , the first species of his first group. 
In the Museum collection we have an example of 0 . t-ni- 
grum , and, as may be seen from the figure in the ‘ Noc- 
tuelites,’ it has no connexion whatever with the remainder of 
the species, but is in fact far more closely allied to Leucania ; 
fortunately the remaining species correspond with D. suspecta 
in size, pattern, coloration, the ascending palpi, simple an- 
tennae, and heavily tufted anal decorations of the male. 
In his ‘ Check-list of North-American Moths ’ for 1882 
Grote rightly reduced the number of M. Guenee’s North- 
American species, Orthodes nimia and candens being sunk as 
