50 University of Michigan 



black; 8-10 uniform brown; appendages brown. Legs dull 

 cream and brown, patterned as in the male. Wings similar 

 to those of the male, but stigma light brown; two minus to 

 two plus postquadrangular cells in the front wing, two in the 

 hind wing; 15 or 17 postnodals in front wing, 14 or 15 in 

 hind wing; in front and hind wings the arculus is distal to the 

 cubito-anal cross-vein about .4 mm., and the anal vein separ- 

 ates from the posterior border about .3 mm. distad to the 

 cubito-anal cross-vein. 



Material Studied : Tumatumari, British Guiana, February 

 II, 1912, one male and one female, the male the type, coll. E. 

 B. W. The specific name refers to the superficial resemblance 

 of this species to certain species in group 2. 



Below the falls in the Essequibo at Tumatumari, on the 

 left bank of the river opposite Sprotson's rest house, is a small 

 slow muddy stream. We collected here one day, February 11, 

 taking, among a number of other things, only two specimens 

 of this Heteragrion, which proved to be specifically different 

 from specimens of the same genus taken on the opposite side 

 of the river where most of our collecting was done. 



27. Heteragrion inca Calvert 



Figures 47, 114, 166 



Described by Calvert (4) from a male and female in the 

 Hagen collection. The female has since been lost or mis- 

 placed. The male is in good condition, but the face is broken 

 so I can not determine the profile. In both front and hind 

 wings the arculus is distal to the cubito-anal cross-vein about 

 .4 mm., and the anal vein separates from the posterior margin 

 from .2 to .3 mm. distad to the cubito-anal cross-vein. The 

 specimens were from Iquitos, Peru. The species is discussed 

 under the next, icterops. 



