1973 ] 
Evans — Neotropical Pompilidae 
215 
which is placed in the Pepsini in Townes’ classification (new syn- 
onymy) . 
Mystacagenia, new genus 
Type-species. — M. variegata, new species 
Generic characters. — Females with the general features of Age- 
niella , including wing venation (shown in Fig. 2) ; males unknown. 
Length of known species 5. 5-8. 5 mm; variously colored, with banded 
wings. Maxillary palpi very long, capable of reaching apex of front 
coxa; mentum with a few thin setae; mandibles with a basal swell- 
ing just below which there is a group of long, pale setae which overly 
and partially conceal the mandible; mandibles slender apically, with 
a small tooth on the inner margin that is strongly set off from the 
shaft. Labrum partially exposed, with a deep median notch; clypeus 
about as wide as lower face ; malar space well developed, at least half 
as long as width of mandibles at their base; antennae unusually 
slender (Figs. 1, 3). Propodeum sloping evenly, its surface smooth 
and devoid of setae; legs devoid of setae except for very minute ones 
on the tibiae and tarsi; claws dentate. First abdominal segment hour- 
glass shaped at extreme base ; last segment bearing a number of setae, 
without a smooth pygidial area. 
Key to species ( females ) 
1. Front of head, including mouthparts, white in color; vertex 
bearing several strong, curved, white setae just behind the 
ocelli (Fig. 3) ; hind wings with a subapical band 
al biceps , new spec : es 
Front of head largely ferruginous; vertex without prominent 
setae; hind wings hyaline 2 
2. Abdomen largely fuscous except basal and apical segments white; 
fore wings hyaline, with a strong band below the stigma and a 
narrow band over the transverse median vein ; length of fore 
wing 5 mm bellula, new species 
Abdomen with all segments irregularly blotched with brown and 
white; fore wings opaque whitish, crossed by three brown 
bands, the outer two connected above; length of fore wing 
7.5 mm variegata , new species 
Mystacagenia variegata, new species 
Holotype , — 9 , Nova Teutonia, Santa Catarina, Brazil, 21 Jan. 
1956 (Fritz Plaumann) [Coll. H. K. Townes, Ann Arbor, Mich.]. 
