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spots on posterior and lateral surfaces of propodeum, top of 
mesepisternum ; legs yellow, posterior femora and tibiae above 
black ; hind tarsi brownish ; abdomen reddish, base of petiole yel- 
low, its apex blackish; wings hyaline, iridescent; venation dark 
brown. 
Type locality. — Mount Maquiling, Laguna, Luzon. Described 
from one female received from C. F. Baker. 
Type. — Catalogue No. 22847, United States National Museum. 
Genus PSEN Latreille 
The three Philippine species of Pseninae, which have the ner- 
vellus reclivate and postfurcal, belong to the subgenus Mimesa 
Schuckard and may be distinguished by the following synopsis : 
1. Propodeal enclosure with a deep, narrow median sulcus; legs blow coxae 
rufous P. politiventris sp. nov. 
Propodeal enclosure without a distinct median sulcus 2. 
2. Face and clypeus with silvery pubescence; legs and abdomen black. 
P. melanosoma sp. nov. 
Face and clypeus with golden pubescence; anterior legs below coxae, and 
posterior legs in part yellowish ferruginous; abdomen with ferrugi- 
nous spots - P. aureohirta sp. nov. 
Psen (Mimesa) politiventris sp. nov. 
Besides the characters used in the above synopsis, this species 
can be readily distinguished from the other Philippine species 
by the highly polished abdomen. 
Female. — Length, 8.5 millimeters. Apical margin of clypeus 
broadly produced, the sides of thq, produced portion rounded, 
medially, with a broad V-shaped emargination ; face with rather 
close, small punctures ; a faint carina between bases of antennae ; 
frons and vertex smooth, shining, though medially the frons 
is punctate-striate; ocelli in a low triangle, the postocellar line 
subequal with the ocellocular line; antennae rather long, thick- 
ened apically, the third joint much longer than the fourth; 
pronotum short, the anterior dorsal margin carinate, not prom- 
inent laterally ; scutum subglabrous, with small, separate, 
distinct punctures; parapsidal furrows slightly indicated ante- 
riorly; scutellum polished, with rather large, distinct, well- 
separated punctures; metanotum impunctate; propodeal inclo- 
sure concave, U-shaped in outline, with a narrow median sulcus 
and about twelve oblique rugge; posterior surface of the pro- 
podeum reticulate; the median sulcus foveolate; mesepisternum 
shining, practically without sculpture ; epistemum distinct ; sides 
of propodeum shining, with small well-separated punctures ; pet- 
iole cylindrical, as long as hind leg to apex of femur; gaster 
