no. 2089. NOTES ON NEOTROPICAL DRAGON FLIES— WILLIAMSON. 637 



EXPLANATION OF PLATES. 



Plate 38. 



All figures with same magnification. All profile views are of the left side. Male 

 appendages are all apically black, and the sparse short hairs, which are present, are 

 omitted in the drawings. Figs. 1-18, males; figs. 19-21, female. 

 Figs. 1-4. Metaleptobasis bovilla; 1 and 2, lateral and dorsal views of male appendages; 



3 and 4, dorsal and lateral views of mesothoracic horns. 

 Figs. 5-8. M. brysonima; same as bovilla. 

 Figs. 9-12. M. mauritia; same as bovilla. 

 Figs. 13-18. M. manicaria; 15, 16, and 17 are dorsal views of mesothoracic horns to 



show individual variation; in profile in this species the mesothoracic horns are 



wider subapically, as shown in fig. 18. 

 Figs. 19-21. M. (?) sp. Rockstone, British Guiana; 19, lateral view, 20, anterior view, 



and 21 dorsal view of pro thoracic horns. 



Plate 39. 



Magnification greater in fig. 3 than in figs. 1 and 2. 



Figs. 1 and 2. Wings of Metaleptobasis manicaria, 2 male specimens from Cumuto, 



Trinidad, March 10, 1912. 

 Fig. 3. Wings of Leptobasis vacillans, male, Los Amates, Guatemala, January 18, 1905. 



In figs. 1 and 2, compare position of arculus with reference to second antenodal, and 

 origin of M la and M 2 in hind wings. The differences in the antenodal-arculus relations 

 of the 2 specimens result directly from differences in the distance from wing base to 

 nodus, this distance being greater in fig. 1 than in fig. 2. 



Comparing figs. 1 and 2 with fig. 3, the origin of M 2 with reference to the postnodals is 

 a striking character and the only venational character employed at present in separat- 

 ing the genera. Another and more significant character is : In Metaleptobasis A and Cu 2 

 are in the same line, while in Leptobasis A and Cu 2 are not in the same line, bracing 

 having taken place at the end of MA. 



Plate 40. 



Wing photographs of Palaemnema paulina males, made by Miss Mary B. Lyon, 

 Cornell University. 



Fig. 1. El Fiscal, Guatemala, June 5, 1909; front and hind wings, showing the unusual 



5-sided sub quadrangle. 

 Fig. 2. El Fiscal, Guatemala, June 6, 1909; front and hind wings, showing the added 



antenodal in the front wing. 

 Fig. 3. El Fiscal, Guatemala, June 6, 1909; 2 hind wings, showing added antenodal in 



the upper (left) wing. 



Plate 41. 



Wing photographs. 



Fig. 1. Protoneura calverti, male, Potaro Landing, British Guiana, February 10, 1912. 

 Fig. 2. Protoneura corculum, male, Morales, Guatemala, May 21, 1909. 

 Fig. 3. Protoneura amatoria, male, Puerto Barrios, Guatemala, March 6, 1905. 

 Fig. 4. Protoneura aurantiaca, male, Los Amates, Guatemala, June 21, 1909. 

 Fig. 5. Protoneura cara, male, Agua Caliente, Dept. Santa Rosa, Guatemala, June 2, 

 1909. 



