Calvert : Odonata of the Neotropical Region. 107 



i c? 3 ?, February, 1900, 3 d\ March, 1900, 6 d\ U. S. National 

 Museum. 



33. Megapodagrion setigerum. 



Megapodagrion setigerum Selys, Mem. Couion. Acad. Belg. , xxxviii, p. 42, 1886. 



A male from Chultimani in Bolivia, taken January 5, 1899, by W. 

 J. Gerhard (Academy of Natural Sciences of Philadelphia) is smaller 

 than the types from Intaj, Ecuador, having the abdomen 30 mm., 

 hind wing 24.5 mm.; there is a supplementary sector between M 2 and 

 R s (nodal and subnodal sectors), not between R s and M 3 (subnodal 

 and median sectors) as the description has it : in this respect this 

 male agrees with M. nebulosum Selys, if there has been no error in the 

 description of setigerum. Nineteen postnodals on the front wings. 

 Head marked as in M. nebulosum. Those parts of the prothorax and 

 thorax, described as " jaunatre pale " in setigerum, are pale blue ; dor- 

 sum of abdominal segment 1 pale blue, its sides as well as those of 2-4 

 inferiorly pale yellow. 



34. Megapodagrion nebulosum Selys. 



Habitat. — Peru: Piches and Perenes valleys, 2,000-3,000 feet, 

 Soc. Geog. de Lima, 1 d\ U. S. National Museum. 



Bolivia: Chulumani, January 5, 1899, 1 c? ; near Coroico, June 

 3, 1899, r c? ; both by W. J. Gerhard. Academy of Natural Sciences 

 of Philadelphia. 



The male from near Coroico has the abdomen 33 mm. long, hind 

 wing 27 mm., 19-20 postnodals on the front wing. The correspond- 

 ing figures for the Chulumani male are 31, 25, 16-18, and for that 

 from Peru, ?, 26, 17-18. 



Genus Heteragrion. 



i. Males zvith the inferior abdominal appendages small, but 



distinctly developed. 



35. Heteragrion aequatoriale. 



(Plate III, fig. 37.) 

 Heteragrion aqttatoriale Selys, Mem. Couron. Acad. Belg., xxxviii, p. 63, 1886. 



Habitat — Peru: Piches and Perene valleys, 2,000-3,000 feet, 

 id 1 , 1 9, from Soc. Geog. de Lima. U. S. National Museum. 



cj\ This male is very large. Even without the second segment (which 

 has been lost) the abdomen measures 48 mm. in length, the hind wing 29 

 mm., so that the latter organs would " atteignent le 6e segment " ; 



