384 
Psyche 
[December 
Figs. 18-23. Fig. 18. Lateral view of Pogonomyrmex barbatus. Fig. 19. Ventral 
region of 2nd abdominal segment of P. barbatus. Note rows of posteriorly pointing, 
anterior spinules (s). Fig. 20. Ventral region of 3rd abdominal segment of P. barba¬ 
tus. Note rows of posteriorly pointing, anterior (s) and anteriorly pointing, posterior 
(a) spinules. Fig. 21. Anteriorly (a) and posteriorly (s) pointing spinules on ventral 
region of 4th abdominal segment of P. barbatus. Fig. 22. Anteroventral region of 
Crematogaster laeviuscula, showing hairs (large arrow), papillae (small arrow), and 
pleats (p). Fig. 23. High magnification of papillae of C. laeviuscula. 
