331 
spicuous punctures, somewhat rugulose in middle, submarginal costae in- 
distinctly visible on distal half, distal costae moderately distinct. Pygidium 
not closely punctate, the punctures not clearly defined. Metasternum not 
densely hairy, finely and rather densely punctate Claws curved and with 
a strong median tooth in both sexes. 
Male—Antennal club nearly as long as the stem. Abdomen nar- 
rowly flattened at middle, penultimate segment with a transverse rugulose 
area which is scarcely elevated. Last segment concave on median ventrum, 
smooth except for a few papilla-like elevations near posterior side of 
concavity. Fixed spur of the hind tibia rather short and broad, being 
about one half the length of the outer spur. Genitalia large, the left 
clasper being especially large (Pl. XLI, Fig. 6-9). They closely resem- 
ble those of P. fraterna, even in the tendency. to a notch in the posterior 
margin of the left clasper. 
*This variety differs from the typical fraterna especially in being 
larger, and in having relatively larger genitalia and larger antennal club. 
Female.—Antennal club very small, as short or shorter than the 
funiculus. Penultimate with a transverse impression on the under side 
near the posterior border. The genitalia are strikingly like those of 
typical fraterna, and are sufficiently illustrated in Figures 10 and 11, 
Plate XLI. 
Grub.—The ventral surface of the last abdominal segment is shown 
in Figure 2. We have compared this grub with that of P. fraterna, and 
find them apparently separable: The two rows of spines on the under 
side of the last abdominal segment are similar but the surrounding hairs 
Si 
SZ 
Agi 
: 7 SZ NAN 
AR AAW 
ZOMG Z 
Art if SZ 
oh, NA 
GAA tXZ 
WMS Z 
Fic. 2. Under side of anal segment of larva of 
P. fraterna, var. nvississippiensis. 
and spines show an apparently constant difference, those of typical fra- 
terna being more sparsely placed, and consequently there are fewer spines, 
and the anterior spines and hairs being less robust. 
