The Genus Perilestes 27 



M, in front wing arising at or near the eighth postnodal (25% males), 

 at or near the ninth postnodal (50% males, 100% females), or at or near 

 the tenth postnodal (25% males) ; in the hind wing at or near the eighth 

 postnodal (100% males, 100% females). 



Mja in front wing arising at the distal end of the stigma (100% males, 

 100% females) ; in the hind wing at the distal end of the stigma (100% 

 males, 100% females). 



Number of cells posterior to Cu^ in front wing, 9 (25% males), 11 (25% 

 males), 12 (50% males, 50% females), or 13 (50% females) ; in hind wing, 

 7 (50% males, 50% females), 8 (50% males), or 9 (50% females). 



Material examined: Brazil, Villa Murtinho, Matto Grosso, April 1, 1922, 

 1 male ; Bolivia, Rio Japaeani, East Bolivia, J. Steinbach, Carnegie Museum, 

 Ace. 5574, 1 male, 1 female. The Brazilian male, coll. E. B. W., the type, 

 and the Bolivian female, coll. Carn. Mus., the allotype. Named for Mr. 

 Hugo Kahl of the Carnegie INIuseum, to whom we are indebted for many 

 kindnesses, the last of which was the loan of all the specimens of Perilest(!S 

 in the collections in his charge. Moreover, before this material was sent 

 us, Mr. Kahl had studied the two Bolivian specimens and was unable 

 to refer them to any described species. 



The single Brazilian specimen was taken at the creek at Km. 315 south 

 of town. Associated with it on the same creek were the rare cornutus and 

 the relatively abundant soluhis. 



7. Perilestes fragilis Hagen 



Abdomen male 50-52, female 50 ; hind wing male 25-26, female 27.5 ; 

 stigma front wing male 1.35-1.60, female 1.50 ; stigma hind wing male 

 1.40-1.60, female 1.60; abdominal appendage male 1.50, female .40; male 

 anterior lamina from apex of sternum of segment 1 to apex of the posterior 

 process 1.30-1.40; female valve 1.85, 



Male. — Labium similar to that of solutus, apical parts not quite as dark ; 

 labrum light blue, almost white, a straight black bar on the anterior border, 

 occupying about one-third' the labrum; anterior surface of the clypeus 

 same color as basal two-thirds of labrum, dorsal surface black, the line 

 separating the two colors smooth. 



Prothorax similar to that of solutus in color and shape. 



Thorax brown above with greenish reflections, shading to black along 

 the middorsal carina which is very narrowly light brown; a pale yellow 

 antehumeral stripe about .2 wide not reaching the upper end of the mesepi- 

 stemum ; mesepimeron reddish brown ; metepisternum yellow or yellowish, 

 with a dark brown stripe along the second lateral suture which widens 

 above to extend across the sclerite while below it is carried across the 

 metinfraepistemum by a broad area which includes all but the inferior 

 angle of that sclerite ; metepimeron yellow or yellowish, the same color 

 as the metepisternum. Metasternum pale, with a median black line as in 

 solutus and, in addition, with a black area on either side in the angle of 

 the latero-ventral carina. 



