474 ^Ir. W. Warren on new 



LVIIL — Descriptions of some neio Genera o/'Pjralidae. 

 By W. Warren, M.A., F.E.S. 



In the course of rearrangement of tlie collection of Pyralidae 

 in the British Museum the formation of many new genera 

 was found to be a matter of necessity. Three only of these, 

 Thh'ptocc.ras, Eurycraspeda, and Callinaias, have as yet been 

 published, and will be found in Col. Swinhoe's paj^er in the 

 Trans. Ent. Soc. for 1890. In view of the approaching publi- 

 cation of a new volume of the ' Illustrations of Typical 

 Specimens of Lepidoptera Heterocera in the Collection of the 

 British Museum,' it has now become necessary to expedite 

 the appearance of the descriptions of a few more of these new 

 genera, to which reference will have to be made in the forth- 

 coming work, and these (nineteen in number) are herewith 

 characterized. Diagnoses of the remainder will be published 

 at the earliest opportunity. 



Parasarama. 



In point of structure, markings, and general appearance 

 identical with Sarama, Moore; distinguished at once by the 

 absence of the antennal processes which occur in the males 

 of that genus. 



Type 1'. cuproviridalis $ , Moore {Locastra, ^l .) ,■= Locas- 

 tra manjarita (J, Butler. 



Opsibotys. 



In place of the old generic terra Botys — the original type of 

 which is the Geometer now known as Lythria purpuniri'a — 

 it is proposed to substitute the term Opsibotys (i. e. Botys in 

 appearance) for all those species of Lederer's tirst division, 

 viz. those with porrect, rostriform, labial palpi, which are left 

 when all other separable genera have been removed. 



Type O.fusca/isj Schitf, {Pyralis). 



Rhectothyris. 



Superficially very much like Lederer's genus Trifhyris • 

 distinguished by entirely diifcrent labial pal|)i. In L/i-cto- 

 tliyris these are shortly rostriform, porrect, while in Trit/iyris, 

 Led., they are upcurvcd close in front of the face. Fore 

 wings very elongate, being four times as long as broad, with 

 the hind margin very oblique and slightly bulging in the 

 middle; wings crossed by two broken hyaline fasciie. 



Type B. </i-atiosalis, Wlk. [Samea?). 



