190 University of California Publications. [ ZooLocy 
Fig. 42.—Arietellus setosus. Female. (a) Dorsal X9. (b) Fifth foot 
X83. (c) Distal portion of one of the bristles of the an- 
terior maxilliped «140. 
4. Genus Phyllopus Brady. 
Phyllopus Brady, 1885, p. 78. 
Phyllopus Giesbrecht, 1892, pp. 66, 419; 1898, p. 124. 
Phyllopus Wolfenden, 1904, p. 124. 
2 Last thoracic segment not entirely symmetrical; abdomen 
with 4 segments, genital segment asymmetrical. Anterior 
antennae with 24 joints. Inner ramus of posterior antennae 
about half as long as the outer ramus of 8 joints. Blade of 
mandible strong, with four teeth. Anterior maxillipeds elon- 
gated, posterior with short, broad first basal. First to fourth 
pairs of feet with 3-jointed rami, second basal with inner mar- 
