2 Mr. R. Trimen on 
is in the Hope Department of the Oxford University 
Museum, and was kindly lent by Prof. Poulton for des- 
cription. The Pyrgus was taken by the Rev. H. Junod 
at Delagoa Bay, and is in his collection at Neuchatel. 
One of the Lycznidx presents characters in combina- 
tion that amount to generic value, and I propose for it 
anew genus, Desmolycwna. Two others, Lycwna gigantea 
and Mimacrea marshalli, exhibit mimetic relations with 
the protected group Acreine, but the former to a less 
extent than the latter. 
Fam. NYMPHALIDA. 
Subfam. ACRAINA. 
Genus ACRHEA. 
Acrxa hypoleuca, sp. n. (Pl. I, fig. 1). 
¢. Exp.al., 2in. 2lin. Fulvous-ochreous, each wing with the 
following black markings, vid.:—two disco-cellular spots (one being 
terminal) ; an irregular discal series of seven spots; and a hind- 
marginal border containing pale spots ; cilia white, narrowly inter- 
rupted with fuscous at extremities of nervules. Forewing: costa 
narrowly edged with black ; spot in cell subreniform, just beyond 
origin of Ist median nervule ; terminal cellular spot attenuated 
superiorly ; below median nervure a small slender oblique spot ; in 
discal series, the first three spots are united and form, with the 
smaller separate fourth spot, a narrow rather oblique subapical bar 
between costa and 3rd median nervule,—the fifth is round, nearer 
base, between 2nd and 8rd median nervules,—the sixth, also rounded, 
is between 2nd and 1st median nervules, immediately below terminal 
disco-cellular spot,—and the seventh is reniform, below 1st median 
nervule and not far from posterior angle; hindmarginal border 
rather narrow, enclosing eight rather large (but inferiorly diminish- 
ing) almost contiguous spots of the ground-colour, so that these are 
outwardly bounded only by a linear black edging of even tenuity, 
but inwardly by much wider black, which is a little diffuse, and, 
while of even width near costa, becomes unequal and strongly 
dentated inwardly between nervules below 2nd radial. Hindwing : 
a very narrow blackish suffusion at base; spot in cell oblique, 
narrow, just above origin of 1st median nervule ; spot at extremity 
of cell very small; in discal series, the spots are smaller than in 
