10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



two paratypes, Rockstone, Essequibo, British Guiana, genitalia 

 preparations WDF nos. 3175, 3984. [Note: The single female specimen 

 (from Shudihar River, British Guiana) that I associate with the 

 males of this species and upon which the present habitus description 

 was made was not designated the allotype because it lacks its 

 abdomen.] 



Location of types. — Holotype and four paratypes in the United 

 States National Museum. One paratype in the American Museum of 

 Natural History (New York). 



Distribution.- — Known only from French and British Guiana. 



French Guiana: Colony of Guiana, St. Jean (no date), St. Laurent (no 

 date). British Guiana: County?, Shudihar River (January); Essequibo County, 

 Rockstone (no date). 



Material studied. — Six males, including their genitalia. 



4. Calystryma naka, new species 



Figures 4, 22; Plates 1 (fig. 7), 2 (fig. 4) 



Male (pi. 1: fig. 7). — Wings above quite like those of C. atrox 

 and C. Mora, dark brown in color and without a white marginal line 

 on hindwing. Wings underneath with ground color pale brown, much 

 lighter in color than in C. atrox with markings quite like those of C. 

 Mora except that there is more orange red on inner side of tripartite 

 postmedian line, especially in interspace Ciii, this color covering an 

 even larger area on this interspace than it does in C. keta. 



Length of forewing 12-13 mm. 



Male genitalia as illustrated by figures 4b-e with harpes fused only 

 at base; with distal one-half of aedeagus gradually curved upward and 

 thus somewhat similar to that of C. atrox but not as in that species 

 curved to the right; with gnathal arms distally acute and bearing a 

 small carina near distal end ; with lateral lobe of uncus having a down- 

 ward directed beaklike posterior projection and with a minimal pro- 

 jection on lower margin and thus similar to C. Mora, differing from the 

 latter in having the upper angle of this lobe greatly projected. Eighth 

 tergite (fig. 4a) similar to that of C. keta, with posterior margin deeply 

 incised and distinctly elongated anteriorly. Differing greatly from 

 that species in having the large posterior lobes evenly rounded. 



Female (pi. 2: fig. 4). — Forewing above dark brown except for a 

 large shining blue area covering base of wing below cell to the inner 

 margin. Hindwing covered by this same shining blue except the anal 

 area, the veins on the outer half of wing, and the outer fringe, which 

 are all dark brown. A single tiny brown marginal spot in interspace 

 Ciii is all that is present to represent the dark brown border found 



