28 
As no very i^ood illustrr.tioii of tbo larva ami ])n])a of this species 
lias heeii puhlislied, occasion is taken to present the ;icc()ini>an\ injj: cnt 
of the insect in its diHerent stiiges, together with brief descriptions of 
the hirva and pni)a to facilitate their recognition. A few short notes 
are also adtled on the life history of the species. 
Description^ life history^ and habits. — To the late Dr. Hy. Shinier and 
to Dr. Asa J'itch we are indebted for our first accounts of the earlier 
stages and life habits of this insect. Tliese accounts were ]»ublished 
in the same year, 18(>5, but that of Fitch, which appeared in his Tenth 
Kew York Report (pp. 1-8), was by far the more <'omplete. 
The Qg^i: does not ai)pear to have been observed, but from analogy 
we may be certain that it resembles that of other Diabroticas. 
The larva shown at h, fig. 7, is nearly cylindrical, narrowed ante- 
riorly, somewhat flattened ventrally, and very elongate, its luigth when 
mature about ten times its diameter. Compared with />. LJ punctata 
the surface is much less strongly wrinkled. The 
general color is milk white, the head and anal plate 
dark brown and corneous, the thoracic ph\te lighter 
brown and somewhat corneous; the tubercles on the 
dorsal surface of the body are more or less distinctly 
marked with light yellowish brown; the six thora- 
cic legs are infuscated, and the exterior margin of 
the coxa' are stronglj^ marked with black. The 
head and thoracic plate and legs are best described 
by the accompanying figures (tig. 8, a and h). The 
anal segment with its retractile proleg is shown 
in i)rotile at d. fig. 7. It terminates in two minute, 
-- „ , ^ ^. , acutelv pointed, upturned teeth. The length of 
Fig. 8.— Larvaof /)jrt?/ro- .,171 » 
ticaviitata: a,he:u\:b, the full-growu larva is about three tenths of an 
leg-greatly enlarged i„^,|, (7_S""n) the widtli tliree-hutidredths of an inch 
(original). ^ '^ 
(0.7-0.8"""). 
The pupa, shown at c (fig. 7), is of nearly the same color as the larva, 
its surface is spar.sely beset with long spine like hairs, those on the 
dorsal surfjice arising from small, but prominent piliferous warts. It 
is not imi)ossible that we have in the arrangement of these hairs good 
specific (characters, but no suitable material in other species is at hand 
foi* comparison. The apical hooks of the abdomen are slightly more 
slender and elongate than these a]>pendages in J). l-J-punctata. 
The larval period is i)assed in the earth, at the base of the stalks, 
and larva' are often found within the steins above ground. This period, 
although i)robably never observed, has been stated to last for about a 
month, and there is an active stage of this duration in which the larva* 
working in numbers have ample time for injuring the vines When full 
grown, just before transformation, the larva becomes much contracted, 
having the appearance of being much stouter, as it is then only about 
six or seven times as h)ng as wide. Larva* observed in 'Inly, 1897, 
