42 U.S. NATIONAL MUSEUM BULLETIN 261 



22. Species more robust; forewings whitish, crown with median 

 length much less than transocular width; ventral processes of 

 aedeagus arising at base of shaft. 



D. intermedium, new species (p. 46) 

 Species more slender; forewings brownish, crown with median 

 length approximately equal to transocular width; ventral proc- 

 esses of aedeagus arising near midlength of shaft. 



D. dolosum (Melichar) (fig. 32) 



Diestostemma colombiae, new species 

 Figure 18 



Length of male 20 mm.; of female 21 mm. Head with median length 

 of crown less than transocular width, crown without a median fovea, 

 with very short pubescence, antennal ledges not foveate, clypeus with 

 a shallow median depression. Pronotum of male as in D. blantoni, new 

 species (see below), of female with few small coarse rugae on disc and 

 with a pair of slight elevations near humeral margins, scutellum not 

 transversely striate. Forewings opaque, with a network of veins in 

 corium, including apical portion of basal half. Male pygofer not deeply 

 emarginate basally; plates not extending as far posteriorly as pygofer 

 apex; style extending about as far posteriorly as connective, apical 

 portion curved slightly laterad, with a slight angular anteapical lateral 

 projection, apex truncate; connective linear, aedeagus with shaft 

 slightly broadened beyond middle in lateral aspect, with a short angular 

 dorsal anteapical projection, a number of spinelike ventral anteapical 

 projections some of which are branched, an apical process which is 

 decurved and parallel to ventral margin of shaft, and an elongate 

 stalked pair of ventral processes arising at base of shaft, curving pos- 

 teriorly and dorsally and extending beyond apex of shaft. Female 

 abdominal sternimi VII with posterior margin produced in a convex 

 lobe which is excised medially, 



Holotype male, "Buonavista, Ost Cord, 1200 m." (MMB); and one 

 female, Zamora, Colombia (MHNP). The type specimen had been 

 determined as Diestostemma limbatipenne Schmidt, by Melichar. 



D. colombiae is quite distinct from all other species of Diestostemma in 

 the bizarre form of the aedeagus. 



Diestostemma blantoni, new species 



Figure 19 



Length of male 17-18.5 mm.; of female 18-19.5 mm. Head with 

 median length of crown less than transocular width, crown without 



