The Genus Perilestes 35 



6 it is nearly or quite black and the anteapical pale area is almost obliter- 

 ated ; on 3-6 the pale narrow median longitudinal stripe, present in solutus, 

 is entirely wanting in minor, except for the merest trace of it on 3 ; 7 with 

 a transverse basal ring, homologous and similar to that of the preceding 

 segments, followed by brown or by black or almost black which passes into 

 dark brown at the apex; 8-10 similar to those of solutus. Seen from the 

 side, 1 and 2 patterned as in solutus, dorsum of 2 brown, not black as in 

 solutus ; 3-6 with the pale basal ring produced posteriorly along the ventral 

 border for only a short distance if at all, thus differing from solutus, but in 

 minor the subapical pale spot, which in solutus is only the slightly more 

 distinct apex of the pale ventral margin, is larger and is produced dorsally, 

 while in solutus it is not so produced at all ; on 6 the subapical pale area 

 is obscure; 7 has a pale basal area and the ventral margin very narrowly 

 pale, with this pale color widened very slightly subapically but not visible 

 in dorsal view ; 8 with a narrower pale basal ring but with the ventrai 

 margin broadly and distinctly pale for its entire length; 9 entirely dark 

 to nearly black, the merest line of pale color on the extreme ventral margin ; 

 10 largely blue, only the dorsum dark. Sterna of 1 and 3 similar to those 

 of solutus, but brown on 3, rather than black ; on 4-5 pale at base, shading 

 into brown which is interrupted at the subapical pale spot of the terga; 

 on 6 pale at base, shading into black which is continuous to the apex or 

 may be narrowly interrupted subapically; on 7 broadly blue at base and 

 more broadly blue at apex, the intermediate region irregularly blotched 

 with black ; 8-10 entirely bright blue. Appendages colored as in solutus. 



Length of the wing or lobe on the expanded postero-ventral margin of 

 the tergum of 2 about .7, and the distance from the apex of the lobe to 

 the antero-ventral angle of the tergum about 1.6. 



Venational characters based on two males 



Postnodals front wing, 10 (25%), 12 (25%), or 13 (50%) ; hind wing 

 10, (50%), 11 (25%), or 12 (25%). 



M3 in front wing and hind wing arising between the first and second 

 postnodals (100%). 



Rs in front wing arising at the sixth postnodal (25%), at the seventh 

 postnodal (50%), or at the eighth postnodal (25%) ; in the hind wing at 

 the sixth postnodal (50%), or at the seventh postnodal (50%). 



M2 in front wing arising at or near the seventh postnodal (25%), at 

 or near the eighth postnodal (50%), or at or near the ninth postnodal 

 (25%) ; in the hind wing at or near the seventh postnodal (50%), or at 

 or near the eighth postnodal (50%). 



Mja in front wing arising at the distal end of the stigma (50%), or at 

 the proximal end of the stigma (50%) ; in the hind wing at the distal end 

 of the stigma (100%). 



Number of cells posterior to Cu, in front wing, 11 (75%), or 12 (25%) ; 

 in hind wing, 9 (100%). 



Material examined : Brazil, Porto Velho, Amazonas, May 19, 1922, 2 males, 

 one of these the type. coll. E. B. \V. 



