Hardenberg—Studies in the Trophi of the Scarabaeidae. 561 
does not represent the hypopharynx, for which it may easily 
be mistaken in other species in which the true hypopharynx is 
absent. 
THE MOUTH-PARTS OF REPRESENTATIVES OF DIFFERENT GENERA. 
Particular attention was paid to the first great group of the 
Lamellicornia, the dung beetles, on account of their peculiar 
adaptation, and the considerable amount of specific variation in 
some of the minor parts, especially the labial structures; also 
in order to come to a clear understanding of the relations as 
there represented, and thus to be better able to trace the varia¬ 
tions from this type in the other groups. 
Copris anaglypticus Say (PL XXX, Figs. 9-13). 
The epipharynx (Fig. 9) shows the same general shape as 
in C. Carolina, but the broad, chitinized supporting arch has 
disappeared, and in its stead we find only a faint line, which 
indicates the attachment to the under side of the clypeus. We 
see that already the place of attachment has moved forward. 
The mandibles (Fig. 10) show only a slight difference from 
those of C. Carolina. The attachment of the lacinia to the 
conjunctivus is, however, more definite. 
The labium (Fig. 12) shows the galea and lacinia more dis¬ 
tinctly separated, the lacinia being clothed with long, fine 
hairs, and its distal end curved outward. 
The hypopharynx (Fig. 13) shows peculiar, two-jointed, 
saber-shaped sense-hairs, most of which are placed along its 
lateral edge, thus showing a distinct difference from C. Caro¬ 
lina, in which similar hairs are borne by the proximal part of 
the lacinia. 
Canthon laevis Drury (PL XXX, Figs. 14, 15 ; Pl. XXXI, 
Fig. 16). 
Here we find the mandibles (Fig. 15), though of the same 
general shape, becoming more chitinized and the membranous 
terminal part correspondingly shorter. The lacinia is here 
somewhat larger and again distinctly connected with the con¬ 
junctivus. 
36—S. & A. 
