550 OPILIONES. 
With regard to the identification of the genera of Perty and Koch, one can only at 
present ascertain what are the types and wait till some competent arachnologist has 
examined the type-species still existing in the museums at Berlin and Paris, and 
has definitely settled what their special characters may be. 
The various genera belonging to this subfamily, some of which are only known to 
me as yet from South America, may be distinguished as follows :— 
GENERA. 
A. Tarsus iii. with 6 segments. 
a. Tarsus i. with 5 segments, 1 and 2 slightly dilate ( ¢). 
6, Tarsus i. with 6 segments, 1-3 slightly dilate ( ¢). 
1. Segments of tarsi iii. and iv. not incrassate, compressed. 
2. Segments of tarsi ii. and iv. incrassate, compressed 
B. Tarsus i. with from 7-10 segments. 
a‘, Tarsus i. with from 5-8 segments. 
a’. Basal segments of tarsus i. only slightly enlarged (3). 
a. Tarsus i. with 5 segments, 1 and 2 slightly 
enlarged (¢) . 
6°, Tarsus i. with from 6-8 segments. 
a‘. Tarsus i. with 6 segments, 1-3 slightly enlarged (¢@). 
a’. Legs iii. and iv. not markedly stouter than 
leandi.. 2. 1 we ee ee 
6°. Legs iii. and iv. markedly stouter than i. and u. 
6*. Tarsus i. with 7 or 8 segments. 
a’. Tarsus i. with 7 segments, 1-4 slightly en- 
larged (3) 2 2 7 1 we ee ee 
6°. Tarsus i. with 8 segments, 1-5 slightly en- 
larged (3) . 2 we ee ee 
b?. Basal segments of tarsus i. very markedly dilate. 
a’. Tarsus i. with 6 or 7 segments. 
a’. Tarsus i. with 6 segments, 1 and 2 or 1-3 dilate (¢). 
a’, Segments | and 2 of tarsus 1. dilate 
b°. Segments 1-3 of tarsusi. dilate . . . . . 
6°. Tarsus i. with 7. segments, 1-4 dilate. 
b”. Tarsus i. with 5 segments, 1 and 2 dilate . 
b', Tarsus i. with 10 segments . . . 
PARAVONONES, gen. nov. 
METAVONONES, gen. nov. 
ERGINOIDES, gen. nov. 
Meracynorta, gen. nov. 
Cynorta, C. L. Koch. 
Ereinus, Simon. 
METERGINUS, gen. nov. 
Pacitrama, C. L. Koch. 
[Ruavcus, Simon. ] 
[MrrarHavcvs, gen. nov. | 
[ PARARHAUCUS, gen. nov. | 
[ Nzoruavcus, gen. nov. | 
[Cosmetus, Pewty (nec Simon).| 
Nore.—The types of Metarhaucus, Pararhaucus, and Neorhaucus are from South America. A short description 
of each is added below for the sake of comparison. 
PARAVONONES, gen. nov. 
Type P. biserratus, sp.n. Mexico. © 
The species here included under Paravonones are very like Vonones, Simon. 
This genus, however, founded 
upon a female, has seven segments in tarsus lii., whereas all the forms described below have but six 
segments, The number of tarsal segments stands thus :—i. 5, 1 and 2 subequal, dilate in ¢; ii. 8-10; 
