303 
Notes on the Uropodinse. By A. D. Michael. 
female) commences between the coxae of the third pair of legs and 
nearly reaches those of the first pair ; it does not fill up the whole 
space between the coxae, being rather narrow ; it is rounded anteriorly, 
truncated posteriorly, and slightly curved at the sides. It has a low 
and fine, longitudinal, median ridge. The genital aperture of the 
male (fig. 4) is rather broader than long, and is placed between the 
coxae of the third legs. 
Legs rather long and set far under the body ; there is a con- 
siderable distance between the coxae of the third and fourth pairs. 
The first pair (fig. 3) have one large and one smaller blunt tooth 
projecting from the outer side of the coxae in both sexes. The femora 
of all the legs have a median crest underneath. The tibia of the first 
leg bears on its inner side a curved, blunt, chitinous rod ; the tarsus 
of the same leg, two shorter blunt rods on its upper surfaces ; a thick 
brush of fine, but not long, hairs near its distal end, and some other 
hairs. The femur of the same leg bears a fine spine on the inner 
side, and those of the other legs a similar, but stouter, spine on their 
posterior side, all directed backward and inward. There is also a 
sparse whorl of small hairs or spines on each genual and tibia, and 
some on the tarsi. All legs terminated by claws on longish peduncles, 
and rather small caruncles. 
Habitat. — One pair, male and female, were found by Mr. E. 
Bostock in an ant’s nest (that of Lasius flavus) near the Land’s End, 
Cornwall, in 1892. I have named the species after him ; I am not 
aware of any other capture of the species. 
List of the British Species of Uropodin^:. 
This list includes all such species as are known to me, except that 
it does not, however, include a few species which are in my cabinet, 
but are still undescribed. 
Uropoda ovalis Koch. 
Notaspis ovalis , Koch, £ Deutschlands Crustaceen,’ &c., Heft. xvii. 
fig. 21. 
„ „ J ulius Muller, “ Insecten Epizoen der Mahrischen 
Fauna,” Jahresheft der Naturwiss. Sec. der Mahr- 
Schles. Ges., 1859, pp. 157-84. 
Uropoda scutulata Megnin ? “ Mem. sur T organisation, &c., des Acariens 
de la famille des Gamasides,” Journ. de l’Anat. 
et de la Physiol. (Robin), May 1876. 
„ „ Haller ? ‘ c Acarinologisckes,” ii. Archiv fur Na- 
turges., 1881, p. 185. 
Notaspis obscurus Berlese, “ Indag. sulle metam. di alcuni Acari inset- 
ticoli,” Atti del R. 1st. Yen. di Sci., &c., 1877, 
