576 OPILIONES. 
of the first opisthosomatic segment and the posterior margin of the third. Segments 4-7 bear a trans- 
verse row of small tubercles. Patelle iii. and iv. of the legs short and globiform. 
Colour. Body entirely brown, the mandibles pale yellow-brown. 
Hab. Guatemata, Tecpan (Séoll). 
2. Paramitraceras hispidulus, sp. n. (Tab. LIV. figg. 4, 4a-d, ¢; 5, 
5a, b, 2.) 
Type do, gynetype 2, in coll. Godman & Salvin. Total length, ¢ 2, 5 millim. 
g. Very similar to that of P. granulatus, but much smaller, the mandibles being not nearly s0 much developed. 
The legs and body-integument, including the eye-tumulus, are densely covered with setigerous tubercles 
and granules, the set being longer than in the above-mentioned species. 
Tarsal segments, i. 3; ii. 4; iii. 5; iv.5. Terminal tarsal claws simple, those on iii. and iv. without an 
inter-basal process. Palpi: coxa with 1, and femur with 4 or 5 small denticles beneath; patella with 
a small tubercle on the inner apical angle; tibia square, with a short denticle at each anterior angle and 
another on the outer posterior angle; tarsus longer than the tibia and narrower, with a few fine marginal 
sete; terminal claw half the length of the tarsus. In some examples, which I take to be females, the 
tibia of the palpus is simple. 
9. Similar to the ¢, but the tibia of the palpus is simple, parallel-sided, without denticles. The exact form 
of the conical eye-tumulus varies a little in different individuals. 
Hab. GuatEMALa, Petet (Sarg). 
METACONOMMA, gen. nov. 
Type M. femorale, sp.n, Mexico. 
Eye-tumulus forming a broad, blunt, erect cone, its apex bearing a sharp point ; the eyes situated at the base, 
one on each side. Tarsal segments, i. 6; ii. 10 or 11; iii. 7; iv. 7, without terminal inter-basal process 
between the tarsal claws. Scutum with five distinct, but shallow, transverse grooves. Legs short in 
the ¢ ; femora iii. and iv. denticulate in the apical half. Palpi stout, not longer than the body ; tibia 
and tarsus with stout spines (basally enlarged) on each side ; terminal claw as long as the tarsus; tarsus 
not longer than the patella. 
A single species only has been received by us from Mexico. It evidently falls very 
near the genus Conomma of Loman. 
1. Metaconomma femorale, sp. n. (Tab. LIV. fig. 6, 3.) 
Type, d, in coll. Godman & Salvin. Total length 7 millim. 
g. Tarsal segments, i.6; ii. 10 or 11; iii. 7; iv. 7. Terminal claws as in Paramitraceras granulatus. 
Integument, legs, palpi, and mandibles smooth, not granulose. Movable digit of mandible stout, very 
slightly curved, with a stout triangular tooth towards the base; fixed digit without teeth. Palpi short, 
not longer than the body, very stout; coxa studded with several rather long denticles; trochanter with 
a single inferior apical denticle; femur with a very long, stout, basal, spiniform denticle, and a basally 
single row, and an apically divergent double row, of small denticles ; patella with a tuberculous prominence 
on the inner apical margin; tibia broad, with four large bisegmentate spines on each margin; tarsus 
shorter than the tibia, with three long finer spines on each margin [these spines, as in the Gonoleptide, 
are modifications of setigerous denticles, in which the seta has itself become transformed into a rigid 
spine]; terminal tarsal claw as long as the tarsus. Coxa of leg i. with a row of four larger and a row 
of smaller denticles, besides a row of four small tubercles across the maxillary piece. Legs i. and ii. more 
slender than iii. and iv., none of them being granulose. Trochanter iii. dilate, its posterior margin tuber- 
culate; femur iii. with a stout, conical, basal spur, and in the apical half a row of six short partially coalescent 
denticles on each side, besides a row of low tubercles on the posterior margin of the basal half. 
