PSYCHE 
VOL. XXXV. DECEMBER 1928 
No. 4 
MICROTRIMERIA COCKERELLI, A NEW GENUS AND 
SPECIES OF SOUTH AMERICAN MASARIDS 
(HYMENOPTERA) 
By J. Bequaert, 
Department of Tropical Medicine, Harvard University Medical 
School, Boston, Mass. 
The wasp to be described in the present paper presents a 
number of features of more than usual interest. It not only adds 
one more species to the very small number of Masaridinse known 
from the Neotropical Region; but it also extends the range of 
this subfamily of wasps to entirely new territory. Moreover, it 
differs in so many respects from the described members of the 
group, that it represents a distinct natural division, which I 
believe is of equal rank with the several genera that are at present 
recognized in this subfamily. 
Microtrimeria, new genus. 
Finely sculptured species. Eye with a deep, triangular 
sinus. Clypeus shallowly emarginate at apex. Mouthparts ap- 
parently as in Trimeria, in so far as they can be seen without dis- 
section: labrum short; labial palpi of 3 long segments; maxillary 
palpi rudimentary or absent. Antenna (in female) of 12 distinct 
segments; flagellum uniformly fusiform throughout, the apical 
segments not set off as a club. Parapsidal furrows present, 
complete. Tegula elongate, its posterior lobe reaching the base 
of the scutellum. Scutellum with a median, raised portion and 
a lateral, depressed rim, completely covering the postscutellum 
when seen from above. Posterior surface of propodeum ver- 
tical; its lateral angles broadly rounded, not mucronate. Middle 
