292 EGIDA. 
faire une description specifique.” The posterior segment 
of the tail is in fact destroyed, but the remainder of the 
body sufficiently proves its complete distinction from any 
other known British species. It is more elongate in 
form than the species of AXga, and the two basal joints 
of the upper antennz are thin and subcylindric, inserted 
beneath the conically anteriorly produced middle of the 
anterior margin of the head (the flagellum is destroyed). 
The lower antenne are nearly one-third of the length 
of the body, with a stout flagellum, consisting of about 
thirteen articulations. ‘They are inserted close together, 
and not separated by a ridge or scutcheon-shaped piece. 
The eyes are of large size, converging above and nearly 
uniting in front; each eye consists of nine rows of 
facets, the middle or longest row containing thirteen 
lenses. The palpiform appendage of the mandibles is 
slender and three-jointed, the second joint thickened at 
the tip and furnished with ten seta set on at right angles ; 
the terminal joint is about two-thirds of the length of 
the middle one, and terminated by a strong bristle, and 
about seventeen short setz on its inner edge. The 
lateral margins of the segments of the body (especially the 
three posterior) are prominent and distinct, each being 
produced behind into a sharp point (our upper left-hand 
figure L to Q represents the four posterior segments of the 
body and the two anterior ones of the tail seen laterally). 
The terminal segments are traversed with a slightly ele- 
vated carina; the legs are rather longer than in the species 
of Aga; the three anterior pairs are strong, with the 
hand and wrist armed with a few short strong spines, and 
the finger unguiculated, having the base dilated so as 
almost to resemble a separate joint. The tail is as wide 
as the body; the anterior segment is narrower than the 
following, and very short, the sides ending in acute spines ; 
