Feb., 1918 Bulletin of the Brooklyn Entomological Society oe: 
SCARABAIDA. 
Aphodius sigmoideus n. sp.—Oblong, moderately convex, with sides 
almost parallel at middle, black with small spot at anterior angles of thorax 
pale, legs rufotestaceous, elytra piceous with testaceous design, and an- 
tennz rufo-testaceous with piceous club. Head moderately coarsely, regu- 
larly, and rather sparsely punctured; front distinctly trituberculate, the 
median tubercle somewhat acute and the most prominent, no transverse 
ridge uniting them; clypeus hemihexagonal, apex widely and quite deeply 
emarginate, and with the angles rounded, flattened just back of emargina- 
tion, sides broadly margined and with margins much. reflexed, gene dis- 
tinctly acutely angulated. Prothorax narrowed in front, sides feebly 
arcuate, hind angles obtusely rounded, disc sparsely, finely punctured with 
larger scattered punctures, somewhat denser at the sides, basal margin well 
defined. Scutellum small, slightly concave and coarsely punctured ante- 
riorly. Elytra just perceptibly narrower than the thorax, rather deeply 
striate, striz finely, shallowly, and sparsely punctured, intervals broad and 
flat, very minutely and sparsely punctured, the design consisting of a fairly 
well-defined testaceous sigmoid marking starting on the second interval 
one quarter distant from base, curving outwards to the seventh interval, 
thence inwards to the third, and finally outwards to the eighth interval, 
the basal portion connected to the base of the elytra by a light patch on 
the second, third, and fourth intervals, and another running up the sixth 
to the humerus, the posterior portion of the first interval and also the 
apical margin somewhat light. Body beneath with moderately coarse 
punctuation on sides of abdomen and mesothorax, elsewhere smooth or 
with very fine, sparse punctuation; mesosternum not carinate. Anterior 
tibia distinctly tridentate, feebly crenulate above, and with the first joint 
of tarsus distinctly shorter than the second. Posterior femora with few 
fine punctures on outer face and series of coarser near posterior, margin; 
the hind tibia fimbriate with short equal spinules; the first joint of hind 
tarsus slightly longer than the following two together. Length 9.25 mm., 
breadth 4.5 mm. 
Type, a unique in my collection, captured by myself in Paradise Park, 
Mt. Rainier, Wash., altitude 6,000 feet, in late July, 1905. 
This very large and distinct species is the largest in western 
North America, being somewhat larger than A. rubidus Lec., and 
only exceeded in size among American species by A. fossor L. 
and A. rufipes L. It belongs in Dr. Horn’s table,* in his “ Group 
B” in the subgenus Aphodius and should come just before A. 
congregatus Mann, a species which somewhat suggests it but is 
much smaller and with less of an elytral design. 
*“ A Monograph of the Aphodini Inhabiting the United States,” by 
George H. Horn, M.D., Trans. Am. Ent. Soc., Vol. XIV (1887), pp. 1-110. 
