476 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105 



Sisyra panama is readily separated from apicalis, also found in 

 Panamd, by the stouter male claspers, more pear-shaped lateroventral 

 halves of the ninth tergite of the female, and brown antennae. The 

 forewing differs from apicalis and nociurna in the more basal forking 

 of R2+3 and pale area in the pterostigma. It is not known whether 

 the sectoral cross-vein found in both the holotype and allotype of 

 panama is constant. Sisyra panama also differs from apicalis in the 

 more extensive dark brown apical shading along the margin of the 

 hindwing. 



This is the third species of Sisyra to be recorded from. Central 

 America, the first, nociurna, having been taken in British Honduras, 

 and the second, ajncalis, in Panama. 



There is no difficulty in distinguishing panama from minuta (al- 

 though similar in respect to the presence of the two radial cross- 

 veins in the forewing and one in the hindwing) because of the dip 

 where Sc approaches Rl apically, the absence of the brown streaking 

 between the longitudinal veins, and the small size (3.2 mm. in minuta; 

 3.8-4 mm. for panama) in minuta. 



Sisyra nocturna NavSs 



Plate 1, figure 5 



Sisyra nocturna Navjis, 1932, p. 115, fig. 76; 1932a, p. 155 (British Honduras); 

 1935, pp. 67-68, fig. 37. 



Since the holotype (the onl}^ specimen of the species and kindly 

 lent b}'^ Dr. Francisco Espanol Coll of Barcelona, Spain) consists only 

 of a torn left forewing and a right hindwing, the original description 

 is translated: 



Body yellow. 



Head fuscous above; eyes fuscous; palpi yellow. 



Thorax with a broad longitudinal fuscous or fuscouslike band. 



Apex of wings elliptical, strongly reticulated, rusty yellow hairs and fringe of 

 the same color; stigma lightlj' rust-colored, divided by cross-veins. 



Membrane of anterior wing (fig. 76) beyond the subcosta lightly stained with 

 rust-color, pale adjacent to veins and branches, with pale rust-colored streaks 

 between the veins and branches; costal area with 8-10 cross-veins, distal ones 

 farther apart; radial sector arising near subcostal cross-vein, 3 long branches; 

 procubitus divided beyond the place of the first branch of the sector, cubitus 

 divided near base of wing; 2 radial cross- veins, one cross- vein between the first 

 branch of the sector and the sector, 2 procubital, one cubital, with cubital cell 

 2a open. 



Posterior wing paler, membrane only slightly stained with rust-color before 

 the margins; radial sector with 3 branches, apex forked; procubitus forked at 

 place of first branch; one intermediate cross- vein between the first branch and 

 procubitus, one procubital, located far bej^ond intermediary. 

 Long. al. ant. 4'4 mm. 

 post. 3' 6 mm. 



