20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



11. Calystryma trebula (Hewitson), new combination 



Figures 11, 18; Plates 1 (figs. 17, 18), 2 (fig. 14) 



Thecla trebula Hewitson, 1868, Descriptions of some new species of Lycaenidae, 

 p. 16; 1873, Illustrations of diurnal Lepidoptera, Lycaenidae, vol. 1, p. 146; 

 1873, ibid., vol. 2, pi. 57, figs. 363, 364.— Godman and Salvin, 1887, Biologia 

 Centrali- Americana: Lepidoptera- Rhopalocera, vol. 2, pp. 84, 85. — Godman, 

 in Godman and Salvin, 1901, Biologia Centrali-Americana: Lepidoptera- 

 Rhopalocera, vol. 2, p. 720.— Dyar, 1914, Proc. U.S. Nat. Mus. vol. 47, 

 p. 149. — Draudt, in Seitz, 1920, De Gross-Schmetterlinge der Erde, vol. 5, 

 p. 801; 1921, ibid., p. 831, pi. 158, figs, h [8] h [9].— Hoffmann, 1940, An. 

 Inst. Biol., vol. 11, p. 717. — Comstock and Huntington, 1964, Journ. New 

 York Ent. Soc, vol. 72, p. 176. 



Male (pi. 1 : figs. 17, 18). — Forewing above very dark brown, hind- 

 wing bright iridescent blue except for a border of dark brown around 

 outer margin that is just over one millimeter in width. It thus differs 

 from all other species of Calystryma. Wings underneath bright 

 yellowish brown, thus also differing from all other species of Calystryma 

 on this surface. Maculation most similar to that of C Mora except 

 that red coloration on hindwing is more distinctly red and the ele- 

 ments of the white marginal line on this wing are convex instead of 

 being more straight, outlining the outer edge of blue spot in interspace 

 Cu 2 and the black pupillated red ocular markings in interspaces M 3 

 and Cuv 



Length of forewing 11.5-13 mm. 



Male genitalia as illustrated by figures 11b-e with harpes fused 

 only at base; with aedeagus slightly upcurved from near middle, 

 otherwise straight; with gnathal arm blunt and slightly upturned at 

 distal end and with carina small and arising from near distal end 

 causing gnathal arm to be nearly bifurcate in appearance and thus 

 differing from all other species of Calystryma; lateral lobe of uncus 

 much less produced than in the other species and with lower margin 

 slightly concave. Eighth tergite (fig. 11 a) similar to that of C. pisis 

 and C barza with anterior projection narrow and rounded, not 

 indented, with troughlike incision of posterior margin only slightly 

 broader anteriorly than at free margin and with posterior lobes 

 slightly rounded, not concave along free margin. 



Female (pi. 2: fig. 14).- — Forewing dark brown except for a few blue 

 scales below vein 2d A in basal one-half of wing. Hindwing bright 

 shining blue except for a dark brown border, about one millimeter in 

 width around outer margin, this border broken into separate but nearly 

 confluent dark brown spots in interspaces M 3 , Cil, and Cu 2 . Marginal 

 white line present in these same interspaces. Anal lobe lacking red. 

 Wings underneath similar in all respects to those of the male except 

 with the marginal ocular markings slightly smaller on the hindwing. 



Length of forewing 11-12 mm. 



