2 1 8 
Psyche 
[September 
coxae. Wings clear hyaline, fore wing with a brown band over 
transverse median vein (weakly extended along basal vein) and a 
much broader brown band nearly crossing wing at stigma. Body 
pubescence very fine and inconspicuous; body with scarcely any erect 
hairs except for those on mandibles, a few on clypeus, and some thin 
ones on apex and venter of abdomen. 
Clypeus 2.7 X as wide as high, shaped as in the preceding species; 
front less broad than in variegata , middle interocular distance .55 X 
head width; upper interocular distance .73 X lower interocular dis- 
tance; vertex very weakly arched above eye tops; postocellar line: 
ocello-ocular line — 6:7; antennae very slender, third segment 6 X 
as long as its apical width, 1.2 X upper interocular distance. Pro- 
notal disc rather flat, very short, posterior margin broadly angulate; 
metanotum angularly projecting backward medially; midline of pro- 
podeum weakly impressed; wing venation differing from that of 
variegata in no important details. 
Mystacagenia albiceps, new species 
Flolotypc . — $, Avispas, 30 mi. from Marcapata, Cusco, Peru, 
1 -1 5 Oct. 1962 (Luis Pena) [Coll. H. K. Townes, Ann Arbor, 
Mich.]. 
Description. — Length 5.6 mm; fore wing 4.5 mm. Head and 
mouthparts entirely white except vertex and occiput blotched with 
testaceous; thorax and propodeum predominantly rufotestaceous, 
blotched with fuscous across much of pronotal disc, center of meso- 
scutum, base and apex of scutellum, along pleural sutures, and over 
most of venter; abdomen rufotestaceous, blotched with fuscous on 
sides of tergites 1-4, tergites 2 and 3 also with small lateral white 
spots; scape mostly white, flagellum brown, darkened toward apex; 
legs mostly rufotestaceous, coxae blotched with fuscous, apices of 
femora and most of tibiae blotched with fuscous and annulated with 
white. Wings hyaline except hind wing with a preapical brown band, 
apex clear; fore wing brownish at base, across basal and transverse 
median veins, and in a broad band below stigma, the last band ex- 
tended along radial vein. Pubescence delicate, inconspicuous; clypeus 
with several white setae in addition to the tufts on the mandibles, 
ocellar area also with several strong, curved, white setae; scutellum 
and apex and venter of abdomen with sparse, weaker setae. 
Clypeus 2.4 X as wide as high, apical margin weakly convex; 
head subcircular in anterior view; middle interocular distance .60 X 
head width ; upper interocular distance .68 X lower interocular dis- 
