1888. J 259 



typical tubercles cannot be very certainly distinguished from the 

 secondary dots. The hairs of the typical tubercles and, to a less 

 extent, of the secondary dots in the second and third skins, are tipped 

 with globules of fluid. Similar globules may be detected on the hairs 

 of the young larvae of rapce and brassicae, but in cardamines they are 

 much larger and more conspicuous, so that no doubt of the nature of 

 the club at the end of each hair is possible, especially as they are 

 shortly renewed if wiped off. They are proportionately largest in the 

 youngest larva in its first skin, but are more numerous in the second, 

 and still more in the third, as the secondary dots develop, and here 

 they are proportionately larger on the hairs of the tubercles proper 

 than on those of the dots. I have no theory to suggest as to the 

 object and use of this curious provision. 



Burghill, Hereford : 



February, 1888. 



DESCRIPTION OF A NEW GENUS AND SPECIES OF LYCMNIBM. 

 BY HAMILTON H. DRUCE, F.E.S. 



PSEUDALETIS, n. g. 

 Allied to Spindasis, but the fore-wings much less triangular and considerably 

 longer, and the hind-wings much more produced at the apex. Head smaller. An- 

 tennae rather short, gradually thickening towards the end, while in Spindasis they 

 are distinctly clubbed. Palpi exceedingly minute, and densely clothed with scales. 

 Abdomen robust, with a thick tuft of hair at the anus. Neuration as Spindasis. 



Type : Pseudaletis Agrippina. 



The species described by me as Spindasis Clymenus will come into 

 this genus. 



PsEUDALETIS AgRIPPINA, n. Sp. 



$ . Upper-side — Primaries and secondaries bright orange-red, rather broadly 

 bordered (except along the costal margin) with black, containing an irregular mar- 

 ginal row of pure white spots. 



Primaries : costal margin narrowly bordered with black, darkest at the base ; 

 at the apex are three gradually decreasing pure white spots, followed by two much 

 smaller and again by a large spot at the posterior angle. Secondaries with three 

 marginal white spots at the apex, followed by two smaller and again by a larger spot 

 between the last median nerTule and the sub-median nervure, beyond which, at the 

 anal angle, there is a broad white patch extending to the orange, with the inner half 

 rather thickly covered with long black hairs. There are also two short black tails. 



Under-side as above, excepting that the black border so distinct on the upper- 

 side is wanting, and that inside the rows of spots at the apices and anal angles of 

 both wings there are rows of smaller white spots running parallel. The base of the 



