272 PROCEEDINGS OF THE ACADEMY OF [May, 



Reis, O. M. 1909. Handlirschia Gelasii nov. gen. et spec, aus dem Schaumkalk 

 Frankens. Ab/id. Bayer. Akad. Wiss., Math.-Phys. Klasse XXIII, pp. 

 659-694, 1 pi. ' ^^ 



Sellards, E. H. 1906. Types of Permian Insects. Amer. Journ. ScL, XXII, 

 pp. 249-258. (Tupus, n. gen.) 



Explanation of Plate XIV. 



Figs. 1-5. — Phenacolestes mirandus Cockerell. Florissant, Colorado. From 

 photographs. These are the specimens described antea, pp. 225-230. 



Fig. 6. — Dimeragrion percubitale n. gen., n. sp. Wings of male, Rockstone, British 

 Guiana, February 1, 1912. (From photograph by H. A. Walters.) 



Figs. 7, 8. — D. percubitale, apex of abdomen of male type, Wismar, British Guiana, 

 January 30, 1912. 7, dorsal view; 8, right side profile view. Camera draw- 

 ings, Zeiss oc. 2, objective A with lower lens off. Scale alongside fig. 7 is 

 that of one millimeter in tenths, for figures 7 and 8 only. 



