BEETLES RELATED TO PHYLLOPHAGA—SAYLOR 163 
facies, Melolontha has claws as in Phyllophaga and not as in Poly- 
phylla. The antennal club of Melolontha melolontha is T-segmented 
in the male and 6-segmented in the female. 
APOGONIA CUPRESCENS Blanchard 
This Philippine species is typical of the genus and is treated for the 
purpose of comparing adults of this and the American Diplotaxis 
tristis Kirby. I am unable to separate these two species generically, 
all salient characters appearing to be nearly identical. The only 
difference seems to be in the hind and middle tibiae, which are slender 
in cuprescens and entirely lack a transverse carina, whereas in trstes 
these tibiae are slightly more robust and have traces of a transverse 
carina on each. In the species of Diplotawis from United States the 
tibial carinae vary from well-marked to nearly absent. 
The larvae of the different species of A pogonia and Diplotaxis can 
no more be separated generically than their adults can, judged from 
the descriptions of the larvae of Apogonia cupreoviridis Kolbe from 
Korea,? Apogonia villosella Blanchard, and Apogonia cribricollis 
Burm from India’? and the examination of larvae of Diplotawis sor- 
dida Say and Diplotawxis brevicollis LeConte from the United States. 
I do not care at the present time definitely to synonymize these two 
genera but wish merely to point out the very close relationships of 
adults and larvae of the two. Whether they may have to be united 
or further divided will have to await later study of the genotypes. 
HAPLIDIA TRANSVERSA Fabricius 
This European species is the type of the genus by designation of 
Hope in 1837. Haplidia approaches the West Indian Cnemarachis in 
the characters of the middle and hind tibiae, which in both genera have 
very incomplete carinae and well-marked marginal spines; it differs 
from Cnemarachis in the less obvious sexual characters, which are 
evidenced only by the very slightly more robust abdomen, shorter 
antennal club, and shorter tarsi of the female; the sixth abdominal 
segment is rounded in both sexes and not differentiated as in the species 
of Cnemarachis. The most distinctive feature, and one separating 
Haplidia from all our American Rhizotrogini except Listrochelus, is 
the presence of a strong arcuate carina on the front below the vertex. 
In Listrochelus the carina is never so distinctly marked; it is always 
straight, never strongly rounded; and the tibial carinae are always 
well marked and complete. The claws of Haplidia transversa are as 
in typical continental Phyllophaga, that is, long and having a short 
submedian triangular tooth. 
® Murayama, Jozo, For. Stat. Chosen Bull. 11, pp. 33-36, 1931. 
10 Gardner, J. C. M., Indian For. Ree., new ser., Entomology, vol. 1, p. 15, figs. 26-28, 
1935. 
