1978] Vetter & Rutowski — Sulphur Butterflies 
385 
Figure 1. A, males of C. cesonia (left), E. nicippe (upper right), and N. iole (lower right); B, dorsal hindwing of male 
N. iole (note sex brand under tip of arrow); scanning electron micrographs of N. iole sex brand without (C) and with (D) 
scales. Scale lines: A, 3 cm; B, 2 mm; C, 300 D, 200 n . 
