562 OPILIONES. 
inner row being the larger; also a few scattered tubercles on the apical dorsal half. Tibi iii. with a 
row of denticles beneath ; iv. with a series of minute setigerous tubercles. 
Colour. Body and legs entirely dull olive-brown, unicolorous. 
Hab. Guatemata, Coban, Cubilguitz (Sarg). 
2. Erginus clavo-tibialis, sp.n. (Tab. LIL. figg. 19, 19a, 4, 3.) 
Type, ¢, in coll. Godman & Salvin. Total length 6 millim. (excl. mand.); femur iv. and patella+ 
tibia iv. 4 millim. 
3. Similar in general characters to E. serrato-tibialis, but without tubercles at the base of coxa iv.; a spur 
present on trochanter iv. Femur iv. with rows of tubercles, but without denticles. Patella iv. dilate, 
with tubercles and three longer tuberculiform denticles on the inner dorsal side. ‘Tibia iv. very short, 
only slightly longer than patella iv., very much dilate on each side, with 5 conspicuous denticles on 
the outer side towards the base and 5 on the inner side towards the apex ; with also a central dorsal 
series of 6 or 7 tubercles, besides others indefinitely arranged; beneath are two rows of tubercles. 
Protarsus iv. bearing a series of minute separate denticles on the inner side, extending throughout its 
entire length. 
Colour. Body and legs reddish-ochre-brown, the protarsi and tarsi paler. Dorsal scutum and free segments 
entirely dotted over with scattered yellow spots, the third segment being outlined posteriorly with a fine 
yellow line. The lateral margins of the prosoma and dorsal scutum are marked with irregular filigreed 
spots of yellow. 
Hab. Mexico, Atoyac in Vera Cruz (Sarg). 
3. Erginus serrato-tibialis. sp. n. (Tab. LII. figg. 20, 20a, ¢.) 
Type ¢, gynetype 2, in coll. Godman & Salvin. Total length, g & 9, 9 millim. (excl. mand.); femur iv. 
5:25, patella+tibia iv. 5°5 millim. 
¢. Similar in general characters to EL. pectinigerus. The two spines on the tergal third segment are short. 
Tarsal segments, i. 6; ii. 9 or 10; iii. 7; iv. 8. Basal segment of mandible with marginal warts. 
Femur iv. with several series of minute tubercles, but without denticles. Patella iv. with an inner 
dorsal series of three longer and two shorter denticles, besides numerous small tubercles above. Tibia iv. 
with 16 basally coalescent subequal denticles on the outer side and 13 on the inner, the longest being 
about the width of the segment, and the apical denticle of the inner series being separate and recurved ; 
besides a dorsal and an inner-dorsal series of tubercles, those of the first series being longer at the 
base and gradually diminishing in size until they become obsolete towards the apex. Protarsus iv. 
without small separate denticles on the inner side. Coxa iv. with a pair of tubercles at its base close to 
trochanter ill. 
>. Similar in structure and colour to the ¢,, except in the development of the tibia and patella iv. 
Colour. Body and legs very similar to those of the preceding species, except that the upperside is much 
darker, and the underside by comparison paler. The yellow filigreed blotches and dots are more distinct 
in the female, and possibly this varies very much with individuals. 
Hab. Muxico, Teapa (H. H. Smith); Guatemata, Tikal, Cahabon, Cubilguitz (Sarg). 
4, Erginus cylindro-tibialis, sp.n. (Tab. LIL. figg. 21, 21,8, 3.) 
Type, d, in coll. Godman & Salvin. Total length 7 millim. (excl. mand.); femur iv. and patella + 
tibia iv. 5 millim. 
¢. Generally similar to that of E. serrato-tibialis, but the denticulation of tibia iv. is different. There are 
two rows of stout, coniform, separate, adjacent denticles on the inner side, the upper series being on the 
basal half only, the denticles becoming finer and finally obsolete. Another series of warts appears on 
the outer side, and the protarsus has a series of widely separate minute tubercles on the inner side. 
