14 PSELAPHID®. 
rather elongate ; castaneous in colour, with the apical two or three joints paler; they 
are simple, and without peculiarity in the shape of the joints, though the eighth joint 
is much shorter than the seventh. The thorax is elongate and slender, with its trans- 
verse line placed far in front of the base. The elytra are rather elongate, without 
humeral angle or tuberculation, and the six punctures at the base are minute and 
indistinct. The dorsal segments bear, in addition to the scanty pubescence, a few fine 
long erect sete; the apical ventral segment is feebly depressed and bituberculate at the 
extremity. The front tibie, though slender, are peculiarly distorted and appear very 
different in shape according to the point from which they are viewed ; the middle tibize 
finely mucronate at the apex. 
8. Batrisus scaphiger. 
Nigro-piceus, nitidus, parce pubescens; antennis castaneis, apice pedibusque testaceis ; capite plano, utrinque 
foveolato. 
Long. 13 millim. 
Mas antennis medio curvato, tibiis anterioribus medio subinflatis, trochanteribus posterioribus majoribus, 
scaphiformibus, dense pubescentibus. 
Hab. * Mexico (Saldé). 
This insect also is only known by one male example. The head is without structural 
peculiarities, flat and shining, and with a very evident fovea on each side. ‘The antennee 
are rather long, and are curved from the fifth to the ninth joints (although there is no 
very striking alteration in the shape of these joints); the fourth joint is slightly larger 
than the third, the fifth is much longer than either the one preceding or the one 
following it, the eighth joint has the lower inner face a little cut away, the tenth Joint 
is not quite so large as the ninth, and the terminal joint is elongate and slender. The 
front tibie are only slightly inflated, the greatest width being about the middle ; the 
middle tibize finely mucronate at the extremity. The hind trochanters are of a most 
extraordinary form, being enlarged, and with a concave face behind, the concavity densely 
set with pubescence. The hind body is also peculiar in form: on the ventral aspect the 
intermediate rings are not exposed, so that it there appears to be composed of only two 
segments, of which the apical one is broad and flat and its hind margin quite broad and 
gently emarginate—thus allowing a considerable portion of a supplementary segment to 
be perceived. 
Although the locality is not exactly known, there can be no difficulty in identifying 
this insect, the structure of the posterior trochanters being unique; in the much rounded 
shoulders, as well as in the structure of the head, it resembles B. castaneus. 
9. Batrisus monoceros. 
Nitidus, parce pubescens ; capite abdomineque nigris ; prothorace elytrisque lete rufis ; antennis pedibusque 
testaceis ; corpore subtus rufo-obseuro ; vertice subconvexo, utrinque foveolato. 
Long. 13 millim. 
