IOWA ACADEMY OF SCIENCES. 
^10 
had all been killed by frost, it is quite safe to say that they 
hibernate and deposit eggs the next spring, there probably 
being but one brood each year. 
A nearly related species, determined at the Division of Ento- 
mology, U. S. Department Agriculture, as Baris dolosa Casey, 
was bred in small numbers from the same stems. It was thought 
to be the same and differences in appearance due to imperfect 
maturing, but there is a decided difference in form of thorax 
and it seems probable that both species breed in the same plant 
and with practically the same life history. 
DESCRIPTIONS. 
Larva: Fig. 11, a. The fully grown larva is about 5-32 in. 
long and 1-16 in. diameter, and a yellowish- white color; head 
light brown, mandibles reddish-brown; legs represented by 
mammiform protuberances. The body tapers somewhat toward 
posterior end, the last segment usually showing four bristles. 
Fig. 11. B. conflnis. a, larva, b, pupa. 
Pupa: Pig. 11, b. About the same length as larva, but com- 
paratively wider. Head (from beneath) fits closely to the body, 
eyes not especially prominent; antennae wide in proportion to the 
length, normally not projecting beyond the sides of the thorax, 
club conspicuous, usually somewhat denser in appearance. 
Snout reaches base of first pair of legs and shows small, 
roundish portions at tip corresponding to the mouth -parts. 
First and second pair of legs clumsy in appearance; joints of 
the tarsi indicated, the last one distinctly curved; third pair of 
legs hidden, only a slight portion being visible along the inner 
margin of the hind wing-pads. Pour abdominal segments visi- 
ble for their entire width. The last segment usually has two 
apical bristles and a group of small spiny processes. 
