138 
by hirticula and rugosa , the second by fusca and inversa, and 
the third by gibbosa. 
Genus Cyclocephala.—The tip of the abdomen and the sum¬ 
mits of the folds on the backs of segments four to nine are 
crowned with short brown hairs, not thickly set. Segments one 
to nine are short, ten and eleven are equal and twice as long 
as nine, twelve is more than three times as long, and segment 
thirteen is very short and followed by a large round anal plate 
which attains the tip of the abdomen. The anal slit is trans¬ 
verse. The hairs on the ventral surface of the last segment are 
uniform and irregularly scattered. The front and clypeus are a 
little roughened, the labrum somewhat more so; the mandibles 
slightly silicate. 
C. immaculata (Plate XII., Fig. 8; and Plate XIII., Fig. 1 
and 2).—The body of this species is cream-colored, and is covered 
with scattered soft brown hairs; the spiracles are orange; the 
head is ferruginous, with a short longitudinal brown line behind 
the usual frontal V, and a black dot at the base of each mandible. 
The first joint of the antennae is globose, the second is cylindri¬ 
cal, three times as long as the first, swollen near the distal end, 
the third is longest of all, the fourth shorter and prolonged 
into a short tooth anteriorly on the under side, the fifth as 
long as the second and tapering to a point. 
Genus Lachnosterna. —Body covered with soft brown hairs, 
the tip of the abdomen and the summits of the folds on the 
backs of segments four to nine covered with short stiff hairs, 
thickly set. The spiracles are ferruginous. Segments one to 
nine are short, ten and eleven are equal in length, twelve is one 
half longer than eleven, thirteen still longer than twelve, and 
the anal plate is small, triangular, anterior margin rounded, 
not attaining the tip, the anal slit consequently angular. On 
the ventral side of segment thirteen is a triangular patch of con¬ 
spicuous brown hairs, the outer of which are simple and pointed, 
the inner flattened and hooked at the tip, with a median double 
row of mucronate hairs, inclined inwardly, extending length¬ 
wise through the middle of the patch. The mandibles are sul- 
cate above, the antennal joints variable. 
L. fusca and inversa (Plate XIL, Fig. 5).—In these larvae 
the subanal spines or hairs are relatively short and weak, the 
greater part of the hairs being hooked, these hooked hairs form¬ 
ing a large triangular patch on each side of the middle line, ex¬ 
tending outward as far as the ends of the anal slit. The spinules 
of the double median row are scarcely thicker or more con¬ 
spicuous than the hooked hairs adjacent. The two rows are 
parallel, extend about two thirds the length of the ventral sur¬ 
face of the segment from the anal slit forward, and are separated 
from each other a distance about equal to the length of a spinule, 
the distance between the spinules in a row being approximately 
half as great. The number of spinules is from twenty-one to 
twenty-five in each row. 
