Occasional Papers of the Museum of Zoology 45 



Wings slightly tinged with brownish ; stigma brown, cover- 

 ing slightly less to slightly more than two cells ; slightly less 

 than two to slightly more than two postquadrangular cells 

 in both front and hind wings; postnodals of front wing 16 

 to 19, of hind wing 15 to 17; in both front and hind wings 

 the arculus is distal to the cubito-anal cross-vein .3 to .4 mm., 

 and the anal vein separates from the posterior border .2 to .3 

 mm. distad to the cubito-anal cross-vein, the greater distance 

 being more usual in the hind wings. 



A teneral female has the head much paler, brown replacing 

 black, except the spots opposite the antennae next the eye, and 

 the brown areas less extensive than the black areas of the 

 mature females ; the thorax is slightly paler, and the abdomen 

 much paler, the subbasal brown areas reduced both on the 

 dorsum and sides, in density of color only on the darsum 

 and in both density and extent on the sides; 9 and 10 are 

 largely pale, w'ith the dark areas indicated but dim. 



Material Studied: Maraquita, Department of Tolima, and 

 Cristalina, Department of Antioquia, Colombia, February 3 

 to 20, 1917, 17 males and i female at IMaraquita, and 184 

 males and 14 females at Cristalina, collected by J. H. and E. 

 B. Williamson. Type male and allotype female, Cristalina, 

 February 18, 19 17, in coll. E. B. W. 



This species was the only Heteragrion observed at IMar- 

 aquita where it was found along the upper San Juan and more 

 rarely along the lower San Juan. We found it along every 

 stream we visited about Cristalina but it was very rare along 

 the Quebrada Cristalina. It was most abundant along the 

 Quebrada La Camelia, so far as our experience went, a 

 little more than one-half our material in both sexes being 

 taken during the single day we spent on that creek. 



At Alaraquita we made the following note: ''Rests on twig 



