OF WASHINGTON, VOLUME XII, 1'Htl. 157 



Megalomus marginatus, new species. 



Pale yellowish; antennae slender, longer than breadth of wings; hind 

 tibia fusiform. Wings yellowish hyaline; venation yellowish, faintly 

 interrupted with brown, margin with groups of dark dots separated 

 by pale spaces, both gradate series margined with brown, the outer 

 quite heavily; an oblique dark stripe from anal angle to end of inner 

 gradate series; this stripe contains a narrow hyaline streak; base of 

 stigma slightly marked, the veinlets here very numerous and close to- 

 gether; hind wings with the outer gradate series black, only three 

 veinlets in the inner gradate series, the stigma yellowish. Fore wings 

 two and a fourth times as long as broad, costal area moderately broad 

 toward base, costal cross-veins numerous and once or twice forked; 

 three veinlets between radius and subcosta in basal half of wing; ra- 

 dius with five or six branches, the outer two being close together at 

 base, or even united; about seven gradate veinlets in inner series and 

 ten in the outer series; the cross-veinlet between the first sector of 

 radius and the median is fully twice its length out on the radial sector. 



Expanse, 15 mm. 



From Canon del Monte Tolitna, 1,700 meters; and San An- 

 tonio, 1,800 meters; Colombia, February (Passl). 



Boriomyia colombiensis, new species. 



Pale yellowish brown; antennas long, slender. Wings rather long 

 and slender, acute at tips, faintly brownish, heavily marked with dark 

 spots and clouds; venation mostly brown or black, sometimes inter- 

 rupted, especially the radius, the subcosta pale; anterior margin of 

 wing with groups of black veinlets separated by pale spots, on hind 

 margin the dark patches and clear spots are both longer; there are 

 dark clouds along the gradate series, and also near the outer and api- 

 cal margins in patches; several darker spots or one large dark spot 

 near end of anal vein, one on connecting veinlet from cubitus to anal; 

 two other dark spots, one at forking of first and other at forking of 

 second radial sector, the latter sometimes much larger and more 

 prominent. .Hind wings smoky, tip darker, costal area yellowish, outer 

 gradates dark, and a dark spot on the lower end of the series. 



Fore wings with the costal area rather narrow; four (sometimes 

 five) radial sectors; three series of gradate veinlets, four to six in in- 

 ner and middle series, six to eight in ou'er series; some of those of 

 outer and middle series have a hyaline dot upon them. Hind wings 

 with two series of gradate veinlets, about six in the inner and eight 

 in outer series. 



Expanse, 22 to 26 mm. 



From San Antonio, Colombia, 2,000 meters, February, and 

 Monte Socorro, 3,500 to 3,800 meters, Colombia, July. " 



