172 Annals Entomological Society of America  [Vol. V, 
EXPLANATION OF PLATES. 
PLATE X. 
Xystocheir taibona sp. nov. 
Gonopods of male, caudo-ventral aspect. 
Fig. 
The same, lateral aspect. 
Fig. 
nore 
Polydesmus bontkus sp. nov. 
Fig. 3. Left gonopod of male, caudo-ventral aspect. 
Titsona sima gen. et. sp. nov. 
Fig. 4. Left leg of first pair, caudal aspect. 
Fig. 5. Antenna. 
6 
Fig. Head and anterior segments, lateral aspect. 
Buwatia monterea gen. et sp. nov. 
Fig. 7. Antenna. 
PuaTE XI. 
Paraiulus tivius sp. nov. 
Fig. 1. Gonopods of male, caudo-ventral aspect. 
Fig. 2. Gonopods of male, lateral aspect. 
Fig. 3. Third pair of legs of male. 
Fig. 4. Second pair of legs of male, caudal aspect. 
Fig. 5. First pair of legs of male, caudal aspect. 
Fig. 6. Gnathochilarium of male. 
Fig. 7. Sensory hair from lateral region of clypeus. 
Paraiulus timpius sp. nov. 
Fig. 8. Gnathochilarium of male. 
Fig. 9. Gonopods of male, lateral aspect. 
PLATE XII. 
Soniphilus geronimo sp. nov. 
Fig. 1. Head, dorsal aspect. 
Fig. 2. Head and prehensorial feet, ventral aspect. 
Fig. 8. Caudal region of body, ventral aspect. 
Poabius nankus sp. nov. 
Fig. 4. Right anal leg, dorsal aspect. 
Parawulus garius sp. nov. 
Fig. 5. Anal scale. 
Fig. 6. Caudal end of body, lateral aspect, showing anal valves, scutum, etc. 
Fig. 7. Same, dorsal view. 
Fig. 8. Appendages of second segment of female as seen from lateral and 
slightly cephalic view. First segment partly separated from the 
second. 
PLATE XIII. 
’ Poabius verdescens Chamberlin. 
Fig. 1. Right anal leg, dorsal aspect. 
Poabius iginus sp. nov. 
Fig. 2. Right anal leg, dorsal aspect. 
Kethops utahensis Chamb., gen. nov. 
Fig. 3. Last two segments, dorsal aspect. 
Fig. 4. Last segment, ventral aspect. 
Fig. 5. Fourteenth ventral plate. 
Fig. 6. Right anal leg, mesal aspect. 
