311 
except at apex; interspaces very slightly convex and entirely smooth. Undersur- 
face smooth on the disk, punctured on the sides. Legs and tibial spurs as in C. min- 
utus, the tooth on the outer margin of hind tibia smaller. 
Length 7.5 to 10™, 
Described from many specimens found in gopher holes at Cresent 
City, Fla. 
At once distinguished from all our species by the brilliant polish and 
minute, inconspicuous punctuation of the upper surface. In size and 
shape and in the armature of the head and legs, as well as in the form 
of the tibial spurs, it agrees with C. minutus, from which it differs in 
the suppression of the punctuation, the feebly indicated, often obsolete 
clypeal teeth, the smaller and narrower eyes and the absence in both 
sexes of thoracic prominences. The elytral interspaces are less convex, 
and the eighth elytral stria is greatly abbreviated. 
C. gopheri appears to have differentiated from C. minutus in compar- 
atively recent times, and has attained a degree of divergence which in 
this group is universally recognized as having specific value. The 
large series of specimens from a single locality, Crescent City, Fla., do 
not show any tendency to variation, and unless intermediate forms 
occur elsewhere, the two species must be considered distinct. 
Onthophagus polyphemi n. sp. 
Oval, shining, black, antenn, trophi and legs piceus; head, elytra, and part of 
thorax with sparse, long, erect, reddish hairs arising from the punctures. Head 
coarsely and sparsely punctate. Clypeus semicircular, somewhat truncate in front, 
not sinuate or dentate on the sides; 
margin reflexed; clypeal carina 
arcuate, vertical carina varying 
according tosex. Eyes above nar- 
row, three times as long as wide. 
Thorax in form, sculpture, and pu- 
bescence varying in the sexes, 
wider than the elytra; sides seen 
from above scarcely rounded; an- 
terior angles not acute. Elytra 
with seven finely punctulate striz, 
the seventh stria arcuate, ending 
abruptly at a smooth humeral cal- 
lus; interspaces not convex, shin- 
ing, biseriately punctate. Epister- 
num of prosternum horizontal, 
slightly excavated anteriorly for the reception of the antennal club. Mesosternum 
smooth at middle, rather sparsely punctate on the sides. Front tibie quadridentate, 
the upper tooth small. 
Male: Vertical carina obsolete at middle, more or less tumid at the ends, some- 
times reduced to a pair of feeble tubercles. Thorax strongly convex, much higher 
than the head, nearly vertical in front, crest of the declivity not protuberant but 
forming on each side a slightly elevated, obtuse ridge; surface of the thorax smooth 
and brilliantly polished, anterior angles and declivity, except at middle, densely 
punctate, sides sparsely punctate, the punctures extending some distance along the 
basal margin. 
20393—No. 4——3 
Fic. 21.—Onthophagus polyphemi n. sp.: a, ¢, from 
above; b, do., side view—enlarged (original). 
