190 Mr. R. I. Pocock on new 
This new genus, of which some of the characters given 
may prove, when other species are discovered, to be merely of 
specific value, is allied to Myrtale of Simon, of which but 
one species also, M. Perrott, is known (Ann. Soc. Ent. Fr. 
1891, p. 300). In many points, indeed, the two are so 
strikingly alike that I was at first disposed to regard them as 
the same. But the figure of the carapace of Myrtale, pub- 
lished on p. 82 of vol. 1. of ‘ Hist. Nat. Araignées,’ makes such 
a reference impossible ; for, if at all accurate, this figure shows 
that the carapace and especially the head of Myrtale are 
much narrower than in Paramigas, and that the branches of 
the thoracic fovea are much longer, the external one, for 
instance, being as wide as the ocular area. Simon also says 
that the claws of the legs in Myrtale have only one tooth, 
and that the labium is only spined at the apex, whereas in 
Paramigas, at least, its distal half is spined. 
With the two specimens of this species were received two 
trapdoor-nests, evidently taken from the trunk of a tree. 
One of these is short, its length from the hinge to the base 
being only once and a half the width of the door and only a 
little greater than the width of the nest ; the other one, how- © 
ever, is much longer, the length from the hinge being twice 
the width of the door. The doors are of the wafer type, and 
are covered, like the sides and upper surface, with moss, 
lichen, and pieces of bark. 
MICROMESOMMA, gen. nov. 
Nearly allied to Paramigas, Moggridgea, and Myrtale. 
Carapace resembling that of Paramigas in having the 
cephalic sulci well developed, but the fovea, which is so deep 
in Moggridgea, shallow ; posterior portion of carapace marked 
with three pairs of marginal impressions; the median im- 
pression of the fovea not so deep as in Paramigas. 
Eyes arranged as in Paramigas, but the anterior median 
less than half the size of the anterior lateral, which are rela- 
tively enormous and nearly spherical; the distance between 
the anterior median eyes about equal to their diameter ; 
posterior laterals minute, barely half the size of the anterior 
medians, and noticeably smaller than the posterior medians, 
which, although elongate, are about as large as the anterior 
medians. 
Mandibles, maaille, labium, and sternum as in Paramigas, 
but the sternum distinctly less narrowed between the coxe of 
the first pair of legs; cove of the second and third legs 
armed posteriorly at the base with a distinct cluster of 
spinules ; indications of these on the coxe of the first leg. 
