168 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 92 
for the mandible another fine, long seta. Epicranium with three fine, 
long setae on each side of the epicranial suture, and a tuft of long 
setae behind the ring-shaped support for the antenna, followed 
ventrally by several moderately long setae. Clypeus with the 
anterior transverse part whitish and without setae and the posterior 
part dark, sclerotized, armed laterally with one anterior and one 
posterior long seta, and between the anterior lateral seta and the 
sagittal line with one long seta. Labrum with apex crenulate and 
somewhat projecting; across the wider part of labrum an irregularly 
wrinkled, heavy ridge; apical projection with two stiff setae on each 
side; on the anterior part of ridge with a series of long setae, two on 
each side and on the posterior part five similar setae on each side; 
three long setae along each lateral margin of labrum between the 
ridge and the apical projection. Ocellar spots apparently absent 
(specimens in alcohol). Antenna slender, with four articles, penulti- 
mate article with a well-developed conical process on inner side at 
apex, the process with a circular sensory spot (“sensillum placo- 
deum”) facing the distal article (PR, fig. 7B); distal article sub- 
elliptical, somewhat asymmetrical, about four times as long as wide, 
terminally slightly constricted, with one large sensory spot on outer 
side and two smaller ones on the more curved inner side, constricted 
end with about seven short tactile pegs. Mandible (fig. 20) without 
any trace of stridulating area on ventral side; scissorial part dark, 
slender, with a small tooth on cutting edge near apex; exterior part 
of mandible limited by two apically converging carinae (DC 
and V@) enclosing a convex subtriangular region distally armed 
with one strong seta and along the entire length with seven or eight 
punctures; ventral carina (VC) with six long setae; molar part of 
right mandible with a subtrapezoidal heel (calx) about one-half as 
wide as long, posteriorly slightly emarginate in the middle. 
Maxillary lobes (lacinia and galea) fused proximally but free dis- 
tally; ventral surface almost exclusively formed by galea, which 
ends with a single strong uncus; dorsal surface formed by both 
lacinia and galea, which are demarcated by a longitudinal well- 
sclerotized sulcus; lacinia ending with three strong, basally united 
unci. Stipes (fig. 19) with a longitudinal row of about 15 pointed, 
conical stridulating teeth, each tooth ()) about as long as wide at 
base. Cardo with long setae but without unusual structures. 
Maxillary articulating membrane (AJ/) with many long and short 
setae but without dark granules or other irregular elements. 
Maxillary palpus projecting beyond galea, with four articles, the 
distal article similar in form and vestiture to the distal antennal 
article but with only a single sensillum placodeum, present on the 
outer side, 
