580 Wisconsin Academy of Sciences , Arts , and Letters. 
Xylorectes satyrus Fab. (PL XXXIII, Figs. 83-86). 
Epipharynx (Fig. 83). In this species we find the epipharynx 
as a free fold of the roof of the mouth. It is somewhat tri¬ 
angular in shape with convex sides, and its lateral portions are 
densely covered with long, sharply pointed hairs; but a median 
area extending the entire length of the organ is left uncovered, 
suggesting the presence of a sensory apparatus of some kind on 
this area. Xothing could be found, however, which might be 
credited with any sensory function. 
Mandibles (Fig. 84). The molar is much reduced; the 
galea is broad, terminating in two short, blunt teeth, and has 
a row of stiff, pointed hairs along its outer edge. The lacinia is 
comparatively large, but in this species there is no indication 
that it contributes to the formation of the terminal blade of 
the mandible. 
Maxillae (Fig. 85). These are similar in shape to those of 
Ligyrus. The galea has become triangular, the outer of the 
two apical teeth being much elongated and sharply pointed. 
Labial structures (Fig. 86). The posterior and anterior 
plates of the sub-mentum differ greatly in size, the former be¬ 
ing short and transverse, the latter large, broad and greatly 
narrowed anteriorly. The comparatively small mentum is en¬ 
tirely pushed in over the sub-mentum and is covered with long, 
pointed hairs similar in shape to those found on the epi- 
pharynx. Its relations to the sub-mentum are like those de¬ 
scribed for Ligyrus. 
Allorhina nitida Linn. (PI. XXXIII, Figs. 87-90). 
Epipharynx (Fig. 87). This is entirely corneous and shows 
the characteristic lateral rows of hairs converging posteriorly. 
Three or four rows have been added to these and cover nearly 
the entire lateral area. In the enclosed Y-shaped median area 
we find a few sense-papillae and in front of these a tuft of 
hairs similar to those on the lateral portions of the epipharynx. 
Mandibles (Fig. 88). These are very similar to those de¬ 
scribed for Cyclocephala; the molar is small, the galea long, 
flat and narrow, and the lacinia broad. They show an ap¬ 
proach in form to the mandibles found in Euphoria. 
