104 THE CANADIAN ENTOMOLOGIST. 



ventral excavation. Wings large and broad ; hind wings undulate, with 

 a deep sinus at the end of vein 5, their basal third of the underside cov- 

 ered with long matted whitish hair between the inner margin and the 

 middle cell ; the remaining surface with prostrate scales. No costal fold. 

 (2 $ from the Amur, and 1 from Yokohama, Staudinger.) 



That Pyrgus Tethys Me'netries (Enutn. Corp. a/iii/i. Musei Petropo/it., 

 p. 126, Tab. x. fig. 8) neither belongs to the genus Pyrgus, nor to either 

 of the other genera of European Hesperides, nor even shows close rela- 

 tions with them, is apparent upon a very slight examination. For that 

 reason 1 am also less sure with regard to Catodaulis, whether it does not 

 coincide with described exotic genera which are otherwise unknown to 

 me, and consequently if the synonymy be not thereby unnecessarily 

 increased. Herrich-Schceffer's Table of the genera does not indicate to 

 me any genus corresponding with it. Kirby places Tethys in his genus 

 Erynnis (- Spiloihyris Bdv.), from which it is certainly to be inferred 

 that he was not acquainted with this butterfly, whose habitus decidedly 

 contrasts with that of every other European Hesperian. In Pyrgus A. we 

 notice prominently the transparent spots of the fore-wings and the waved 

 border of the hind-wings. With Scclothrix, Tethys has nothing but the 

 tibial tuft in common. 



The latter character is undoubtedly absent from the female, which is 

 unknown to me ; and still further I do not know whether the shaggy hairi- 

 ness of the hind-wings (which was the occasion for the adoption of the 

 name) pertains to this sex. These hairs seem moreover not to adhere 

 very firmly, for not a vestige of them appears in a male example which has 

 been long on the wing, and "is besides not everywhere present in equal 

 completeness. 



Pyrgus. 



Club of the antennae ovate or elongated, feebly compressed, straight, 

 or not quite regularly falcate, rounded off at the end (except in Poggei). 

 Lock of hair long. Palpi projecting more than the length of the eyes 

 beyond the front, the middle joint bristly, the apical joint thick, bluntly 

 conical, horizontal or directed obliquely forwards. Tibiae unarmed 

 (except in eribrellum), destitute of the tuft. Abdomen as long as the 

 head and thorax united, reaching as far as to the posterior angle of the 

 hind-wings. Fringe checkered. 



