56 
Psyche 
[Vol. 93 
bisinuate beneath tubercles; profile weakly convex with highest 
point near middle. Malar space: 0.72-0.77 as long as basal width of 
mandible. Wing venation: brachiella sometimes reaches less than 0.5 
the distance to wing margin. Propodeum: much as in female but a 
little more elongate: basal face about 1.2 as long as the steeply 
sloping apical face; cristae a little broader and stouter than in 
female, ligulo-cuneate, very prominent; surface apicad of basal 
trans-carina duller than in female with delicate reticulation and 
more or less extensive moderately strong oblique wrinkling. First 
gastric tergite: postpetiole elongate, parallel-sided, 1.0- 1.2 as wide 
apically as long from spiracle to apex; dorsal carinae obsolete. Gas - 
ter: rather strongly depressed. 
Type Material. Holotype $: PERU, Lima Province, San 
Geronimo, nr. Chosica, 1 — 5— VII-1 976, C. Porter, C. Calmbacher. 
Paratypes: 5$, 2 <J, same date as holotype. Holotype in Florida State 
Collection of Arthropods. Paratypes in Florida State Collection of 
Arthropods (1$, 1(5), Collection of Henry K. Townes (1?), Museum 
of Comparative Zoology (12), University of Kansas Collection (12), 
Collection of Charles C. Porter (12, 1(5). 
Relationships. This species appears closely related to the 
Ecuadorian Biconus atroruber (Townes 1969:178-79), with which it 
agrees in being ferruginous with black markings and in having a 
median and an apical dark area on the fore wing. It differs from B. 
atroruber by its entirely dark (instead of white banded) flagellum; in 
having the mesosomatic black markings restricted to the mesoscu- 
tum, tegula, and scutellum (instead of extending also onto the 
pronotum, subalarum, mesosternum, upper metapleuron, and pro- 
podeum); in its mostly ferruginous (instead of mostly black) coxae; 
by its strongly (instead of finely) wrinkled apical propodeal face; 
and in having the female propodeal cristae ligulate (instead of sub- 
conic and decurved slightly at apex) and the male cristae ligulo- 
cuneate (instead of high and cone-like). 
Biconus apoecus may be distinguished from the central Peruvian 
B. subflavus Porter by characters given in the key, as well as by its 
shorter first flagellomere, more weakly tuberculate and apically less 
convex clypeus, longer female malar space, shorter and higher 
propodeum, and less definitely micro-reticulate postpetiole. 
Field notes. San Geronimo, Peru, the type locality, is on the 
lower west Andean slopes in the valley of the Santa Eulalia River 
