EPEOLUS. 
259 
tex convex; ocelli placed in a triangle on its summit; 
antennae short, linear, the joints of the flagellum sub¬ 
equal ; face flat, carinated longitudinally in its centre 
between the insertion of the antennse; clypeus trans¬ 
verse, lunulate, convex, margined anteriorly; labrum 
transversely ovate, with a small process in the centre in 
front; mandibles bidentate, the internal tooth minute, 
the external robust and broad ; tongue rather long, more 
than twice the length of the labium, tapering to its ex¬ 
tremity ; paraglossae short, about one-fourth the length 
of the tongue, broad at the base, and acuminate towards 
the apex; labial palpi more than half the length of the 
tongue, the basal joint longer than the three following, 
membranous, and gradually decreasing to the second, 
which is one-third the length of the first, and acute at 
its apex, where the third subclavate joint is articulated, 
the terminal joint considerably shorter than the third ; 
labium not more than one-third the length of the tongue, 
and trifid at its inosculation, the central division being- 
hastate ; maxillae subhastate, more than one-half the 
length of the tongue ; maxillary palpi consisting of one 
robust short conical joint inserted in a deep circular re¬ 
ceptacle. Thorax subglobose; prothorax conspicuous, 
with its lateral angles slightly prominent; mesothorax 
with its bosses prominent; wing scales large; scutel- 
lum transverse, gibbous, margined posteriorly, slightly 
mucronated laterally, slightly depressed in the centre, 
and impending over the post-scutellum, which is inap- 
parent; metathorax abruptly truncated; wings with 
three submarginal cells, and a fourth feebly commenced, 
the first as long as the two following, the second subtri- 
augular, and receiving the first recurrent nervure about 
its centre, and the third lunulate, and receiving the 
s 2 
