20 E. B. Williamson and J. H. Williamson 



at or near the eighth postnodal (25% males, 75% females), or at or near 

 the ninth postnodal (25% females). 



Mjo in front wing arising at the proximal end of the stigma (12.5% 

 males), two cells before the stigma (62.5% males, 100% females), or three 

 cells before the stigma (25% males) ; in the hind wing one cell before the 

 stigma (37.5% males.), two cells before the stigma (62.5% males, 75% 

 females), or three cells before the stigma (25% females). 



Number of cells posterior to Cn^ in front wing, 11 (25% males), 13 (50% 

 males), 14 (12.5% males, 50% females), or 15 (12.5% males, 50% females) ; 

 in hind wing, 9 (12.5% males), 10 (75% males, 25% females), 11 (12.5% 

 males, 50% females), or 12 (25% females). 



At the time of capture magdalenae and remotus were not recognized as 

 two species, and all our notes are on envelopes containing the much com- 

 moner species, remotus. 



Material examined: Colornhia, Cristalina, Dept. Antioquia, Quebradas 

 Cristalina (3 specimens), Sabaleticus (3 specimens) and La Camelia (4 

 specimens), February 12-18, 1917, 8 males, 2 females, type male Quebrada 

 La Camelia, February 18, allotype female Quebrada Cristalina, Febraary 

 12; all in coll. E. B. W. 



This species is known only from the streams about Cristalina, Colombia, 

 in the Magdalena Valley, where it was associated with the commoner 

 remotus. 



5. Perilestes atteiiuatus Selys 



Abdomen male 43.5-48, female 37-37.5 ; hind wing male 20-21.5, female 

 20.5-22; stigma front wing male 1.05-1.10, female 1.10-1.20; stigma hind 

 wing male 1.15-1.20, female 1.20-1.27; abdominal appendage male 1.40-1.60, 

 female .30-. 35 ; male anterior lamina from apex of sternum of segment 1 to 

 apex of the posterior process 1.30-1.40; female valve 1.95-2.20. 



Male. — Labium pale, apices of parts very slightly darker, except the mov- 

 able hook which has the apical half or more black as in kahli ; labrum and 

 clypeus in front light blue, almost white, the former in front with a straight 

 black border, occupying scarcely one-fourth the length of the labrum, 

 clypeus above black, the line between the black and pale areas smooth. 



Prothorax pale, slightly darker above, especially posteriorly where it is 

 pale reddish or rusty brown ; hind border straightened above, very slightly 

 trilobed, the lateral extremities almost vertical. 



Thorax above like that of kahli except that the antehumeral pale stripe 

 reaches the upper end of the mesepisternum ; side of thorax similar to that 

 of fragilis except that the dark stripe on the second lateral suture is slightly 

 wider throughout and widens below on the metepimeron into a more or less 

 bilobed expansion; metinfraepisternum dark reddish brown above, shading 

 into black below, the lower angle pale. Metastemum pale, a black longi- 

 tudinal median line from the coxae to about two-thirds the length of the 

 metastemum where it ends in a fork or this black line maj^ reach nearly the 

 apex of the metastemum, widened into a circular area at about two-thirds 



