OL en 
———————————— ll 
7. = — 
2 
Pe a ee 
Added to this, the hind wings are more pilose at the 
bases than in the foregoing species ; a denser and 
less transparent texture being the result. The 
markings are arranged almost exactly as in /”. apollo, 
but the f.w. have the two outermost of the four costal 
spots marked with red, as well as that near the inner 
margin. H.w. with the red spots larger, and lighter 
red than in /. afo//o, and without white centres, a 
well marked ante-marginal row of triangular spots. 
Spots near anal angle sometimes marked with red, 
but only faintly so. 
? Usually larger, duskier, more transparent than ¢ . 
Abdominal pouch differs from that of 7. afo/lo, as 
will be seen in the figure, especially in its anterior 
part (avée, p. 171). 
HaAn., Altai, Tianschan, Alps of Kokand. At 
an elevation of about 4,000 to 6,oooft. V.—VIIL. 
This species when first discovered was thought to 
be identical with var. cory4as of Fischer de Waldeim, 
1823. It is, however, perfectly distinct from that 
form, which has its habitat in North-Eastern Siberia. 
a. ab. 2 nigricans Stgr. Aust. Par. pl. VIII. 
fig. 3. A very dusky melanic form of ¢ taken in 
Tianschan by Alpheraky with the type, but not 
reaching such great elevations. 
6. var. minor Stgr. Aust. Parn. pl. VIIL., figs. 1, 2. 
A small and darker form, and less transparent than 
type. HH. w. with the inner marginal patch more 
intense and extended, hiding the spots near anal 
angle. Red spots smaller than in type, and some- 
times centred with white. 
Hap. Ala Tau (Songaria). Hazereth, Province of 
Samarkand. Found with the type in these two 
separate districts of Central Asia. Said not to occur 
at the higher elevations. 
( To be continued. ) 
BRITISH FRESHWATER MITES. 
By CHARLES D. Soar, F.R.M.S. 
( Continued from page 178). 
2. Hydrochoreutes kramert Piersig, 1895. 
DO not think this water mite requires any 
particular description. It can easily be 
Fic. 9. H. krameri, Petiolus. 
recognised from 4. ungulatus by its petiolus (fig. 9). 
It isa much rarer mite than the other. 
MALE.—The male is. a little smaller than the 
male HW. unugulatus. 
LocaLiries.—During my experience I have only 
seen two specimens, both males. One was sent by 
Dr. George from Lincolnshire, and one I found in 
Surrey. I have not yet had a fully-developed female 
SCIENCE-GOSS/P. 209 
of this species, only one or two young ones, and a 
few nymphs. 
GENUS BKACHYPODA LEBERT, 1875. 
The characteristics of this genus are :— Body 
chitinous, with a granulated surface, and a 
depressed line running round margin of female. Legs 
short, not very hairy, but adapted for swimming. All 
tarsi have claws. Epimera forms one group. _ Valpi 
spoon-shaped on fourth segment. Eyes widely 
separated and near margin of body. Three discs on 
each genital plate. 
Brachypoda versicolor Miller, 1776. 
MALE.—Body : A long oval, slightly truncated on 
the anterior margin. Length about 0°64 mm. Width 
about 0°44 mm., dorso-ventrally rather flat, par- 
ticularly in the posterior portion. Colour a straw 
Fic. 1. &. versicolor. Ventral surface of Male. 
yellow, with green, red and white patches on the 
dorsal surface, which in some specimens are very 
brilliant. On the anterior margin of the dorsal sur- 
Fic. 2. &. versicolor. Ventral surface of Female. 
face is a depressed line, which extends backwards 
about one-third of the body. 
Lecs.—A pale straw colour. Length of first pair 
about 0°40 mm. ; fourth pair abouto*53mm. On the 
fourth segment of the last pair of legs isa strong spur, 
very similar to those we find on the male Arrenuri. 
This was one reason why Koch, in his work, placed 
this species in genus Arrenurus. All feet have 
claws. 
EPIMERA.—Forms on group, very highly coloured, 
the central portion in some cases being a bright 
