Hackman: Cicadella Hieroglyphica. 197 



In phase 1, ventral aspect, the valves placed side by side are com- 

 paratively narrow at their bases, widest at a point a little before the 

 middle, and then tapered to somewhat pointed apices. Dorsally 

 they do not appear to extend as far cephalad as they do ventrally, 

 nor are thej^ divided into right and left valves except for a short 

 distance apically, at which point they are widely separated. 



In phase 2, viewed ventrally, the two valves have become longer 

 and slightly narrower than in the preceding phase, and instead of 

 their former relationship, side by side, the right valve at the base is 

 now assmning a ventral position with respect to the left valve. Also, 

 the flat surfaces of the valves, instead of being parallel to the ventral 

 plates, are now assuming a perpendicular position. Between the 

 valves, at a point a little beyond the middle, a short, slender finger- 

 like process is visible. Viewed dorsally, this process appears be- 

 tween the two valves at the point of wide separation in phase 1 and 

 projects for a short distance caudad. It is an evagination of the 

 integument of the valves. 



In phase 3, ventral aspect, the two valves have continued to in- 

 crease in length. The right valve is distinctly folded over the left 

 valve at the base. A lateral aspect shows plainly the relative posi- 

 tion of the median process and the valves. In phase 3, dorsal aspect, 

 there is little change in the valves except an increase in length. The 

 median process also shows an increase in length and width. 



In phase 4, ventral view, the valves again are longer than in the 

 preceding phase, and the median process also shows a distinct in- 

 crease in length. The folding of the right valve over the left valve 

 is more complete, and the bases of the two valves are farther apart 

 than in the preceding phase, the left valve having moved caudad. 



In phase 5 the oedagus appears very similar to the adult oedagus. 

 Here the valves have become very much longer than in phase 4. 

 The median process has increased greatly in length. 



During the development of the valves their apices have main- 

 tained their relative length in respect to the ventral plates. The in- 

 crease in length has been taken up by increased dorsal curvature. 



For a description of the adult male internal genitalia, reference 

 may be made to the description of the species. 



