XV CLASSIFICATION 411 
species, one in the Mediterranean region and one in Chili. There 
are about sixty species of Uloborus, some of which have a wide 
distribution, while many (eg. U. republicanus, of Venezuela) are 
social. The type species, U. walckenaerius, is a very rare spider 
in England. 
(iii.) The MIAGRAMMOPINAE include two genera containing some 
very interesting forms. The genus Miagrammopes, of which 
twenty species have been described, though the number is 
probably far greater, is characterised by a very long cylindrical 
abdomen, and by the apparent possession of only four eyes, in 
a transverse row. These are really the posterior eyes; and the 
anterior eyes, or some of them, are present in a very reduced 
condition. Little is known of the habits of these spiders. 
The other genus, Hyptiotes, though only boasting three species, 
possesses a special interest on account of the remarkable snare 
constructed by the spiders which belong to it. 
This has already been described in the section 
upon defective orb-webs (see p. 349). 
The type species, 1. paradoxus, is very rare 
in England, and though small and inconspicuous, 
it is certainly one of the most curious members 
of our Spider fauna. 
Fam. 25. Archeidae.—This small family 
includes certain remarkable fossil spiders from 
Baltic amber, and two rare recent forms, Archea 
(Eriauchenus) workmani from Madagascar, and F 
Mecysmauchenius segmentatus from America. 
The chelicerae, which are extraordinarily long, are articulated tar 
away from the mouth-parts. The caput is clearly marked off 
from the thorax, and is much raised. In several other respects 
these spiders are very distinct from all other members of the 
order. 
Fam. 26. Mimetidae.—The Mimetidae form a small group 
in general appearance recalling the Theridiidae, with which family 
they were for a long time incorporated. The chief genera are 
Ero, Mimetus, and Gelanor. Ero furcata (= thoraciea) is a 
pretty little spider, not rare among grass in England. The 
upper side of its very convex abdomen is marked with red, 
yellow, and black, and bears two little protuberances or humps 
near the middle. It is only about an eighth of an inch long. 
1a. 212.—Hyptiotes 
paradoxus, 2. 
