Fig. 1. 
Fig. 1. 
Fig. 1. 
EXPLANATION OF THE PLATES. Xxl 
view of the buccal parts; 2d, genital orifice; 2e, microscopical texture of 
the epiderm; 2 f, adhesive grooves at the end of the sternal plate; 2g, chela of the 
mandible with its appendages. 
TAB. XIX. 
Megisthanus armiger, 3 (pp. 84, 51): La, ventral view; 1 4, lip and palpi; 1c, chela 
of the mandible ; 1 d, genital orifice ; 1 e, tooth-bearing joints of second leg. 
. Pachylelaps heros, var. mexicanus, 3 (pp. 37, 38, 52): 2a, ventral view; 2 b, chela 
of the mandible; 2c, genital orifice; 2d, ventral view of the buccal parts, lip, corni- 
culi labiales, and palpi; 2e, leg of the second pair. 
Celenopsis uropodoides, ¢ (pp. 35, 52), dorsal view: 3a, chela of the mandible with 
its appendages ; 3 4, lip with corniculi labiales. (See also Tab. XVI. figg. 4-4.) 
Celenopsis megisthanoides, 2 (pp. 36, 52) : ventral view of the buccal parts, with the 
lip, corniculi labiales, and valpi. 
TAB. XX. 
Celenopsis megisthanoides, 9 (pp. 386, 52): la, ventral view; 16, chela of the 
mandible. 
Holostaspis marginatus (pp. 39, 52): 2a, ventral view ; 24, lip, corniculi labiales, and 
palpi; 2c, chela of the mandible; 2 d, tarsus of second leg. 
TAB. XXI. 
Pterolichus momotorum, 3 (pp. 89, 52): 1a, anal appendages with the adhesive discs ; 
1 4, chelze of the mandibles and palpi. 
Pterolichus momotorum, 2 (pp. 39, 52): 2a, ventral view. 
. Proctophyllodes sialiarum, 3 (pp. 42, 53). 
Proctophyllodes sialiarum, 2? (pp. 42,53): 4a, leg of the second pair ; 4 4, chela of the 
mandible; 4c, egg with embryo. 
. Megninia pteroglossorum, 3 (pp. 40, 52): 5 a, nymph of ?; 5, larva. 
BIOL. CENTR.-AMER., Arachn. Acar., January 1893. d 
