160 PROC. ENT. SOC. WASH., VOL. XII, 1910. 



line and the tip of wing, the basal costal region is also silvery. The 

 hind wings are not as broad at base as in M. argentilineata; more like 

 M. lineata. 



Expanse, 18 mm. 



From Guiana (Rolle). 



Leptocella pulchella, new species. 



Pale whitish yellow; tips of antennal joints dark, and four black 

 spots in fore wings before the anastomosis, forming a rhomboid, one 

 of the spots on the hind margin, two black spots on the anastomosis, 

 and two to five fainter spots beyond, sometimes forming a faint band; 

 the outer fringe gray, that at anal angle longer and nearly black; 

 hind wings wholly pale whitish, with long white fringe. Discal cell of 

 fore wing swollen both above and below just before tip. 



Expanse, 20 mm. 



From Canon del Monte Tolima, Colombia, 1,700 meters, 

 December (Fassl). 



Polycentropus colombiensis, new species. 



Head black, with fulvous or brownish hairs; antennae yellowish; 

 pronotal lobes with tawny hair; thorax dark; abdomen black above, 

 brown below, legs pale yellow brown, basal joint of tarsus I darker. 

 Wings dark brown or black, densely hairy, with many faint golden 

 spots, not prominent, fringe dark; hind wings dusky, darker at tips, 

 venation brown. Fore wings with the discal cell a trifle longer than 

 its pedicel; first apical fork shorter than its pedicel, second fork reach- 

 ing to end of discal cell, third and fourth forks an equal distance back, 

 but not as far as the second; the fifth fork reaching nearly one-half 

 way back of the discal cell, wide near base. Hind wings rather broad, 

 no discal cell, both branches of radial sector forked, upper very 

 shortly so, fourth fork large and its upper branch close to lower 

 branch of the third fork. 



Expanse, 20 mm. 



From Canon del Monte Tolima, 1,700 meters, Colombia. 

 January 10. 



Actual date of issue, September 6, igio. 



