2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



and eighth tergite. Gnathos divided into two separate armlike parts, 

 each with an elbow bend near or before middle and with apical part 

 (forearm) often with carina along inner surface; carina either laminate 

 or dentate. 



Eighth tergite of male abdomen subcordate in shape with a broad 

 and deeply incised posterior concavity, usually much more deeply 

 incised than in Calycopis. 



Female genitalia with ductus bursae a simple sclerotized tube, 

 envelope shaped at ostium bursae with a superior genital plate above 

 and a ventral genital plate below the ostium and usually with the free 

 edge of the superior genital plate divided into two lateral elements 

 bearing teeth or spurlike processes. In one species (C. atrox) this 

 free edge is a long continuous ridge. Bursa copulatrix with two large 

 platelike signa, each ornamented with a centrally placed spine that 

 is rose-thorn in shape and with anterior margin deeply dentate. 

 Signa thus similar to those of Calycopis. 



In habitus Calystryma is similar to Calycopis, especially in that the 

 forewings of the males lack the scent pads frequently found in the 

 Theclinae and in having some shade of red in the area between the 

 large blue lunule in interspace Cu 2 and the postmedian tripartite line 

 on the undersurface of the hindwing. In Calystryma the red inner 

 lining along the postmedian tripartite line on undersurface of the 

 hindwing is reduced greatly or lacking with the Sc-f-Ri element of this 

 line very distinctly outlined with black, forming a black and white 

 bar that stands out sharply from the rest of this line. Except in four 

 species (C. atrox, C. malta, C. anapa, and C. gentilla) there are two 

 submarginal ecellate spots below vein M 3 on this same surface. The 

 uppersurfaces of all but one species (C. trebula) are either entirely 

 dark brown or very dark brown covered with dull metallic purple. 

 The males of C. trebula have the hindwing dark iridescent or shining 

 blue and thus resemble most of the species of Calycopis in this respect. 



The author wishes to acknowledge with thanks the cooperation 

 and aid of A. G. Gabriel, T. G. Howarth, N. H. Bennett, and D. S. 

 Fletcher, all of the Department of Entomology, British Museum 

 (Natural History), London, and Frederick H. Rindge, Depart- 

 ment of Entomology, American Museum of Natural History, New 

 York. The late William P. Comstock of the last named museum 

 also greatly helped the author. 



The figures of the male and female genitalia and of the eighth 

 tergites of the males w T ere drawn under the author's supervision by 

 Andre D. Pizzini, staff artist. All photographs were made by Jack 

 Scott, staff photographer, except figures 1 through 4 on plate 3, 

 which were furnished by the courtesy of D. S. Fletcher on the staff 

 of the British Museum (Natural History) . 



