1975] Lawrence £ff Stephan — Cerylonidae 143 
Fig. 1 . Ccrylon unicolor (Ziegler), fifth ventrite, posteroventral view. 
Fig. 2. Mychocerus depressus LeConte, mesosternum and portion of meta- 
sternum. Fig. 3. Mychocerus arizonensis , n. sp., same (ms = mesosternum; 
c =r coxa). Fig. 4. Ostomopsis neotropicalis, n. sp., antennal club. Fig. 5. 
Mychocerus arizonensis, tegmen, dorsal view. Fig. 6. M. arizonensis, 
aedeagus, lateral view. Fig. 7. Ostomopsis neotropicalis, tegmen, dorsal 
view. Fig. 8. Philothermus occidentalis, n. sp., tegmen, dorsal view. 
Fig. 9. P. occidentalis, prothorax, ventral view. Fig. 10. Cerylon unicolor 
(Ziegler), prothorax, ventral view. Fig. 11. Lapethus striatus (Sen 
Gupta and Crowson), anterior portion of head, dorsal view. Fig. 12. 
Lapethus discretus Casey, same (ac = anteclypeus, 1 = labrum, m = man- 
dible, s = maxillary stylet). Fig. 13. Cerylon conditum, n. sp., aedeagus, 
lateral view. Fig. 14. Cerylon distans, n. sp., same. Fig. 15. Cerylon 
castaneum Say, male, clypeus and labrum. Fig. 16. Cerylon conditum, 
male, pronotum. Fig. 17. C. castaneum, male, pronotum. Fig. 18. C. uni- 
coior, female, pronotum. Fig. 19. C. unicolor, male, pronotum. 
