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Female: Clypeus longer than in the male, less broadly truncate, vertical carina 
straight, entire. Thorax slightly convex, scarcely higher than the head, without 
declivity in front, surface strongly and unevenly punctate, the punctures on the 
disk much sparser and finer. 
Length 5.5 to 6.7™™, 
Described from numerous specimens found in July in gopher holes 
at Cresent City, Fla. 
The sexual characters vary greatly in degree of development. For 
the above characterization of the sexes the most strongly marked speci- 
mens have been selected. In the large series before me there are indi- 
viduals in which the sex can with difficulty be determined. The 
anterior tibiz are equally stout in both sexes, but the distance between 
the front margin of the clypeus and the carina on its hind margin is 
always greater in the females than in the males and affords the best 
guide for the recognition of effeminate males. 
In the male the vertical carina is sometimes nearly entire, the thorax 
is often less globose and in its form approaches that of the female. In 
such cases the anterior declivity disappears, and the punctuation 
extends more or less over the disk. The females vary less than the 
males, but the ends of the vertical carina are sometimes slightly tumid. 
The punctuation of the thorax is also variable and the disk is occa- 
sionally nearly smooth. 
In addition to its peculiar sexual characters, the shining surface and 
sparse punctuation, even in the females, sufficiently distinguish this 
from all other North American species. All hitherto described species 
in our fauna have the pro-episternum excavated for the reception of 
the antenne, the excavation beginning at the suture. In O. polyphemi 
this seclerite is very slightly excavate on its anterior face only, the 
greater portion of its surface being horizontal. 
Aphodius troglodytes n. sp. 
Belongs to group I-b of Dr. Horn’s Monograph of the Aphodiini (Trans. Am. 
Ent. Soc., Vol. xtv, 1887.). Color, honey yellow, or reddish yellow. Head without 
ante-ocular impression, very sparsely and finely punctulate in both sexes, nearly 
smooth in front; eyes small, parvly retracted into the thorax, finely granulate. 
Thorax finely punctulate, the punctures growing denser and somewhat larger on the 
sides, but without intermixed coarse punctures. Elytral interspaces with sparse, 
fine punctures, equally minute in both sexes. Hind legs and tarsi slender; the first 
tarsal joint longer than the three following joints; the two spurs nearly equal in 
length. 
Length 3 to 3.8™™. 
Very closely allied to A. stercorosus, but differs by the absence of an 
ante-ocular impression and by the character of the punctuation, which 
is always finer and does not vary in the sexes. The intermixed larger 
punctures upon the sides of the thorax are wanting in this species. 
The eyes appear less convex on account of the obliteration of the ante- 
ocular groove; they are usually in great part covered by the thorax and 
are appreciably smaller. The hind legs are more slender and the tarsi 
longer than in A. stercorosus; the first tarsal joint is always longer 
eS 
