96 Mr. A. G. Butler on the 



Streptostele simplex. 



Testa subulata, tenuis, imperforata, cereo-alba ; anfractus 9, apicales 

 Isevcs, cfcteri convexiusculi, sutura obliqua profunda discreti, lon- 

 gitudinaliter confertim striati ; apex obtusus, globosus ; apertura 

 parva, longit. totius | vix sequans, subtjuadrata ; pcrist. baud 

 incrassatum, antice leviter expansum ; columeUa subrecta, reflexa. 



Longit. 8^ niillim., diara. 2 ; apertura 2 longa. 



Tliis species has I'athei* convex wliorls, 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. fastiqiata^ Morelet. It also bears some resemblance to S. 

 Biichholzi o^ Martens, from the Gameroons, but is considerably 

 smaller, and has shorter and rather more convex whorls. 



VIII.' — Notes on the Genns Dyschorista, Led., a small Group 

 of Moths allied to Orthosia. By A. G. Butlek. 



The genus Dyschorista was founded for the reception of two 

 Euro])can species, D. suspecta, Hiibn., and D. i/psilon=Jissi- 

 puncta, Hew. (see Lederer, Noct. p. 143, gen. 82). 



Accepting Z). suspecta as type of the genus, it will be neces- 

 sary to include the bulk of the forms referred by M. Gueuee 

 to his previously characterized genus Orthodes. 



Orthodes, Gu^nc^e, was described in the tirst volume of the 

 ' Noctuelites,' p. 371, no type being indicated ; but Gueuee 

 selected two of the species, 0. t-nigrum and 0. curvirena 

 (both Brazilian), for illustration. In the descrijjtion of the 

 species of his second group Guence pointed out that 0. cur- 

 virena differed structurally from the remainder of the genus: — 

 "L'une d^elles [Curvirena) a les palpes particulitireraent 

 ascendants et allonges." He thus restricted the identification 

 of his type to 0. t-nigrum, the first species of his first group. 



In the ]\Iuseum 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 s})ecies correspond with D. suspecta 

 in size, ])attern, coloration, tiie ascending palpi, simple an- 

 tenna3, and heavily tufted anal decorations of the male. 



In his ' Cheek-list of North-American Moths ' for 1882 

 Grote rightly reilueed the number of M. Guenee's Nortli- 

 Anieriean species, Orthodes niniia and candens being sunk as 



