Review of the Genus Hrebia. 231 
2. EL. meta (Fig. 44), This species has rather 
slender lateral processes to the tegumen. The styles do 
not end so abruptly upwards as in other species, but pass 
on to the body, dwindling in size. There are some little 
differences in the size of the styles and their lateral 
extension in different specimens, which I have under the 
names yssica, gertha, mopsos, alexandra, but they are not 
sufficient to warrant definition. I fancy larger series 
would show such slight differences to be individual to a 
great extent. 
3. EL. sibo (Fig. 45). This has the lateral 
processes of the tegumen very short and small, incurved 
and adpressed, so as to be very inconspicuous. The clasp 
has a little trace of depression before the tip (site of 
neck ?); styles of moderate size in several rows. 
3a. LE. ocnus. It has the same tegumen as 
stbo, which is quite a distinctive one. The styles are 
rather bolder and the one at the extremity of the clasp 
is very large. As five preparations of my own, and one 
or two of Mr. Elwes’s preparations, are all I have seen of 
the two species, I do not like to be positive, but incline 
to regard the differences observed between sibo and ocnus 
_as individual ‘variations ; I should unite the species, if this 
is at all in agreement with other indications. 
4, E. kalmuka (Fig. 46). This species 
comes nearest to H. sivo in the form of the tegumen; the 
clasp is smaller, with bolder styles in definite alternate 
rows, the front one incurved. Despite its peculiar facies, 
both the appendages and neuration show this to be the 
natural position of the species. 
5. HL. radians (Fig. 47). I have already 
referred to the cylindrical S-shaped shafts and hemi- 
spherical ends of the lateral processes of the tegumen, that 
distinguish this species. The styles are large and bold, 
there is a depression in the stylous ridge possibly repre- 
senting the neck. 
6. E. turanica (Fig. 48). This very closely 
resembles /. meta especially in-the form of the tegumen, 
and in the styles invading the shaft of the clasp, which is 
however smaller, more delicate apically and more rounded. 
7. £. edda (Fig. 49), The central process 
of the tegumen is rather long; the clasp resembles that of 
