1986] 
Porter — Biconus in Peru 
59 
fore wing; tip 0.23-0.26 as high at notch as long from notch to apex. 
Male, differs from female as follows: Color: white flagellar 
annulus reaches from apex of 8th to base of 13th segment. 
Length of fore wing: 9.6 mm. First flagellomere: 6.0 as long as 
deep at apex; except near base with numerous and prominent, 
rather crowded, linear white sensilla. Clypeus: tubercles more dis- 
tinct and apical margin more strongly convex than in female; profile 
rather strongly convex with highest point a little distad of middle. 
Malar space: 0.82 as long as basal width of mandible. Wing vena- 
tion: radial cell 3.1 as long as wide; brachiella absent. Propodeum: 
basal face long but more strongly declivous than in female, 0.85 as 
long as the almost vertical apical face; cristae a little stouter and 
more conical than in female; surface distad of basal trans-carina 
more coarsely and regularly wrinkled than in female. First gastric 
tergite: postpetiole slender and parallel-sided, 0.91 as wide apically 
as long from spiracle to apex. G aster: cylindric, not depressed. 
Type material. Holotype $: PERU, Cuzco Province, Machu 
Picchu, 1900 m, 4-19-IX-1964, C. Porter. Paratypes: 2?, 1<$, same 
data as holotype. Holotype in Florida State Collection of Arthro- 
pods. Paratypes in Florida State Collection of Arthropods (19, 1<5), 
and Collection of Charles C. Porter (19). 
Relationships. As indicated previously, this species differs 
substantially in many points of color and structure from the other 
described Biconus. It may be recognized at a glance by its orangish 
ground color and unifasciate fore wing. 
Field notes. The type locality is in cool tropical cloud forest. 
Specimens of Biconus subflavus were swept from lush undergrowth 
at the forest edge along the railway tracks which parallel the Uru- 
bamba River. 
Specific name. From the Latin adjective subflavus, “somewhat 
yellow”. 
Acknowledgments 
This research was done under my National Science Foundation 
Grants BSR-83 13444 and DEB-75-22426. It was also subsidized in 
1974, 75, and 79 by grants from the Committee for Research and 
Exploration of the National Geographic Society, which made pos- 
sible fieldwork in the Peruvian Coastal Desert. 
