Fig. 
Fig. 
EXPLANATION OF THE PLATES. 
TAB. I. 
. Trombidium mexicanum (pp. 1, 44): la, palpus; 14, mandible; 1c, first tarsus ; 
1d, second tarsus. 
. Trombidium trilineatum (pp. 4, 45): 2a, palpus; 2 4, tarsus; 2c, texture of the skin. 
. Trombidium albicolle (pp. 5, 45): 3a, palpus. 
TAB. II. 
. Trombidium hispidum (pp. 2, 44): la, palpus; 16, mandible; le, first tarsus ; 
1d, second tarsus. 
. Trombidium guayavicola* (pp. 4, 45): 2a, palpus; 2c, tarsus. 
. Trombidium muricola (pp. 5, 45): 3a, 3 4, varieties of the same. 
TAB. III. 
. Trombidium nasutum (pp. 2, 44): la, palpus; 16, second tarsus; le, first tarsus ; 
ld, anterior margin of sternum; le, mandible; 1 f, texture of the skin; lg, skin 
with hairs. 
. Bdella splendida (pp. 15, 48): 2a, tarsus; 26, top of the rostrum; 2c, mandible. 
. Larva of Bdella (?) sp.+ (p. 16) : 3a, first tarsus, showing the texture of the skin ; 
36, mandible; 3¢, palpus; 3 d, second tarsus. 
TAB. IV. 
. Trombidium quinquemaculatum (pp. 8, 45).: 1a, palpus; 14, fourth joint of first leg ; 
lc, first tarsus. 
. Rhyncholophus erinaceus (pp. 6, 45): 2a, palpus, with top of labium; 24, section of 
leg with hairs; 2c, tarsus. 
* = T. muricola, var. ft Probably belongs to Rhyncholophus. 
BIOL. CENTR.-AMER., Arachn. Acar., January 1893. C 
