Review of the Genus Hrebia. 217 
Mr. Elwes from his single male specimen is very different 
from that of xthiops, having a margin of styles along 
nearly its whole length and spreading at the head over a 
considerable surface: it is nearly straight and the open 
side extends nearly to the head. The most natural place 
of the species is, therefore, apparently, as a member of the 
ligea group, but related to ligea much as, say, flavofasciata 
is to manto. I cannot, however, avoid the belief that 
vidleri may prove to be the American representative of 
xthiops, and that some accident has, perchance, attributed 
to this specimen a substituted clasp. 
b. 1. #.manto (Fig. 5). I have already 
discussed the form of clasp in this species. The neck is 
rather longer and narrower than in ligea, and the shoulder 
drops to ‘it rather suddenly and precipitately, but this 
is merely a general or average difference not holding good 
for all specimens. There is also, perhaps, a little more 
variation in the direction of large and bold styles on the 
shoulder, interfering with its regular outline, but I could 
not propose to name with certainty any individual clasp of 
either species. The sharpness of the lateral process of 
the sickle in manto, compared with the spathulate 
tendency that it exhibits in ligea and ewryale, can, however, 
I think, be depended on. Pyrrhula is merely a local 
variety, but its clasp varies rather more than in typical 
manto. An odd specimen (from an old collection), stated 
to be a Swiss example ef pyrrhula, and not unlike it, has 
a very different clasp, more like that of #. pharte. It is 
certainly not manto, but I must. hope for more material 
before going further, and only mention it here to call 
attention to a possibly unrecognised species (Fig. 8, &, /). 
2. H. eriphyle (Fig. 6). The clasp has 
the same general outline as that of H. manto, but it is 
very smooth and regular by comparison, owing to the 
smallness and uniform size of the styles ; and this character 
suffices to distinguish the species in the many specimens of 
both that I have examined. A critical distinction, how- 
ever, may be found in the sickle, the total length in 
manto being 1°88 mm. and in eviphyle 1:50 mm., or about 
as 5 to 4. 
The clasp in the remaining species of the group has no 
very definite lobe or shoulder, but a neck and head are 
usually definitely marked off from the body or shaft. 
