34 University of Michigan 



slender and acute and more apical. The profiles are like those 

 of alhifrons. The arculus is .3 to .6 mm. distal to the cubito- 

 anal cross-vein, and the anal vein separates from the posterior 

 border .1 to .4 mm. distad to the cubito-anal cross-vein. 



Chrysops is said (de Selys 2) to have the abdomen red- 

 dish orange or even carmine; the Hagen specimen has it red- 

 der than in any specimens of alicnuin seen by me. The color 

 character used in the key for separating the males of alienujii 

 and clirysops may not prove constant. Aliennm is known 

 from ^lexico, Guatemala, Honduras and Panama. 



The following material has not hitherto been recorded : 

 Puerto Barrios, Guatemala, June 23, 1909, E. B. William- 

 son, collector, four males and two females, one of the males 

 the type and one of the females the allotype, in coll. E. B. W. : 

 Cayuga, Guatemala, March 21 (forest streams), April 5 (for- 

 est stream), May 3 (forest), June 4 (forest), six males, all 

 collected by ^^'m. Schaus, in collection of P. P. Calvert. "Cay- 

 uga is 23.4 miles from Barrios; the elevation of station is 

 107 feet and the forest ridge is about 400 feet higher. The hills 

 in question are on the south side and are covered with dense 

 tropical forest (no pines at all)." — Letter from Wm. Schaus 

 to Dr. Calvert. 



19. Hcteragrion chrysops Hagen 



Figures 40, 90, 127, 128, 154 



This species is known only from Porto Cabello, Venezuela. 

 The type, or one of the type males, is in the Hagen collection. 

 The face of this specimen is broken and the profile cannot be 

 determined. The arculus is .4 mm. distal to the cubito-anal 

 cross-vein, and the anal vein separates from the posterior 

 border from .1 to .4 mm. distad to the cubito-anal cross-vein. 

 The female is not known. See remarks under alicnuin. 



