268 Annals of the Carnegie Museum. 



Plate III. 



Figs. 37-42. Supero-internal oblique views of the right abdominal appendages 

 of males of species of Heteragrion. 



37. Heteragrion ceq-uatoriale Selys, $ , Piches and Perene valleys, Peru. 



38. Heteragrion inca, sp. nov., $ , Iquitos, Peru. 



39. Heteragrion triangnlare Hagen, $ , Chapada, Brazil. 



40. Heteragrion aarantiacwn Selys, $ , Rio de Janeiro. 



41. Heteragrion JIavidorsum, sp. nov., g, nine miles from Coroico, Bolivia, 

 May 19, 1899. 



42. 43. Heteragrion angustipenne Selys, $ , Cumbase, Peru. 43, profile view, 

 left appendages. 



FlGS. 44, 45. Perilestes fragilis ? Hagen, $ , Chapada, Brazil. 44, supero- 

 internal oblique view of right superior appendage; 45, internal view of same from 

 slightly above. 



Fig. 46. Pe?'itestes comutus ? Selys, $ , Surubres, Costa Rica, similar to fig. 45 ; 

 damaged. 



FlGS. 47, 48. Oxyagrion divaricatum, sp. nov., g, Chapada, Brazil. 47, dor- 

 sal, and 48, left profile view of abdominal appendages. 



Figs. 49, 50. Oxyagrion rufulum Hagen, $ , Quillota, Chile. 49, left profile 

 view of appendages ; 5°> supero-internal view, right superior appendage. 



Fig. 51. Oxyagrion evanescens, sp. nov., g, Chapada, Brazil. Left profile 

 view, abdominal apex. 



Figs. 52, 53. • Oxyagrion hempeli, sp. nov., g , Sao Paulo. 52, dorsal, and 53> 

 left profile view of abdominal appendages. 



Figs. 54, 55. Oxyagrion basale Selys, $, Chapada, Brazil; similar to the pre- 

 ceding. 



FlGS. 56, 57. Oxyagrion impunctatwn, sp nov., $ , Chapada, Brazil; similar to 

 the preceding. 



