1947] 
Dilaridae 
109 
N. prestoni in size, being larger than the ones occurring 
in Dilar. The triangular fore wing, short hind wing, the 
small number of cross-veins and the anastomosis of 
MP3 +4 and CuA are also suggestive of Nallachius. On 
the other hand, the relatively large size (wing expanse, 
25 mm.), and especially the very extensive secondary 
branching of the veins are suggestive of Dilar . The latter 
characteristic is probably the most significant of these, 
and until the male is found, we may assume the closest 
affinities are with the Old World Dilarids. 
The female type (which is in the Museum of Compara- 
tive Zoology) is the only specimen of this insect known 
to me ; it was collected at Pacho, E. Cordilleras, Colombia, 
elevation 6600 ft. 
