144 
the last two segments being conspicuously narrower than the preced- 
ing. In other respects the larva remains unchanged. 
The only objects which I have noticed in the ground about the 
roots of corn, which are likely to be mistaken for the corn root worm, 
are very young earthworms, the larve or grubs of small gnats and other 
flies, and young wireworms. On a careful examination the first two 
of these may be readily distinguished by the fact that they are en- 
tirely destitute of legs, while, as already remarked, the root worm has 
three pairs of jointed legs just back of the head. In this respect it 
agrees with the young wireworms, which are (also like the root worm) 
sae es of appendages to the other segments of the body. ‘Their crust 
; however, firmer than that of the latter species, the head is longer, 
flatter, and thinner, the body also usually somewhat flattened and ‘the 
last segment commonly either notched or variously toothed. 
Pupa (Plate XIV. Fig. 8).—The characters of the newly formed 
pupa are well shown by the figure, but as some changes occur previous 
to the escape of the beetle, a description of the latest stage is given. 
The length is .18 of an inch, and the greatest width about .1 of an 
inch. The color is pure white throughout, with the exception of the 
brownish red eyes, which now show through the skin, and a pair of 
brown, horny, curved hooks, attached to the tip of the abdomen about 
equaling in length the preceding segment. ‘The arrangement of the 
wings, wing covers, legs, and antenne, and the position of the head, 
are well shown in the cut. Two white erect hairs are seen between the 
antennz, and another pair above and between the eyes. 
Several scattered slender spines appear upon the back of the pro- 
thorax, as well as an irregular transverse row upon each of the other 
segments of the thorax and abdomen. These hairs are especially long 
and strong at the tip of the abdomen, and a few likewise appear upon 
the tibio-femoral joints. The hairs, as well as the forceps-like claws at 
the tip of the body, already mentioned, doubtless serve to fix the pupa 
skin in the earth when the beetle emerges. The spiracles are distinctly 
visible as small brown rings upon the back of each of the first eight 
abdominal segments, but upon the three remaining segments posterior 
to these they are not apparent. 
Imago (Plate XIV., Fig. 6).—The adult beetle is about one fifth 
of an inch in length by about half that in breadth, and a little widest 
posteriorly. Its head is nearly as wide as the thorax, smooth, or nearly 
so, with ia large circular depression between the eyes, from which a 
narrow groove leads forward, dividing between the antenne and en- 
closing between the branches ‘of the fork an elevated ridge, which ex- 
tends downward to the labrum. On either side of this, and in front of 
each antenna, the surface is minutely rugulose. There is also an angu- 
lar depressed line just within each eye. The antenne are rather long, 
extending backwards beyond the middle of the elytra. The second and 
third joints are short and equal, and together about as long as the 
fourth. The remaining joints of. the antenne are of nearly equal 
length. The first and second joints are nearly smooth, the remainder 
pubescent. The eyes are black, the head and first joint of the antenne 
are pale brown or green or brownish green, and the rest of the an- 
tenne, the labrum, and mouth parts brown. 
