73 
tennse are nine-jointed, filiform, reaching the base of the thorax, 
ther stout, slightly serrate, and somewhat ferruginous beneath; 
3 third joint longest, the fourth and fifth equal. The eyes are 
Eminent, the mandibles short and wide, with one inner tooth. The 
ixillary palpi are long and slender, the first joint minute, the 
ical joint shorter than those before it; the first and second joints 
the labial palpi shortest. The abdomen is rather long, cylindri- 
1 in the males and carinate in the females, and suddenly com¬ 
essed at the apex. Nasus, labrum, tegulae and edge of collar 
litish; a brownish interrupted band on each segment of tergum; 
's varying from reddish-brown to white, their coxa?, except at the 
), the femora of the four anterior legs beneath, apical joints of 
eir tarsi, the femora of the posterior legs, apical half of tibise, and 
eir tarsi, except base of basal joints, black; inner claw tooth 
ort; wings hyaline, faintly clouded. The male has the antenna) 
jch flattened and brown beneath; the bands on abdomen whitish ; 
is with less of black, coxae and posterior femora above black. The 
igth varies from two-tenths to twenty-two hundredths of an inch, 
d the expanse of the wings from forty-two to forty-seven hun- 
edths. 
Egg .—The egg is said by Prof. Riley to be white, opaque, and 
ree-hundredths of an inch long. 
Larva .—The larva, when full-grown, is from six-tenths to sixty- 
e hundredths of an inch in length, varying in color from pale 
eenish to dirty yellow, with a faint whitish bloom along the dorsal 
d sub-dorsal regions, inclining, in most cases, to deep blue-green 
the thoracic segments. There is a broken band along each side, 
a deeper shade of green, composed of spots or patches which 
alesce on the anterior segments, but are distinct and separate 
hind; below the bands the body is paler, with a faint yellowish 
it. Under surface, pale yellowish and semi-transparent; feet and 
olegs—of which latter there are eight pairs—all pale yellowish. 
3 ad of a more decided yellow than body, with usually a dark brown 
ot above, one of nearly the same size at the upper front, and two 
fcher smaller ones at each side, joined by a brown line, the ante- 
)r spot being lower down than the other. In certain specimens 
ese two are blended, and there is only a triangular spot on the 
p of the head, while the depth of the shading on the body is also 
riable. 
In the Transactions of the Illinois State Horticultural Society for 
67, Prof. Riley speaks of a possible second variety of this larva, 
ffering principally from that above described in that the head has 
t one black spot upon each side. 
Pupa ,—This is of a dingy greenish-wliite color, the members 
ing somewhat paler than the body. 
LIFE HISTORY. 
According to Prof. Riley’s observations, the adult flies appear in 
rly spring and soon lay their eggs, depositing them in the petioles 
the leaves, pierced for this purpose by the ovipositor of the 
nale. These hatch in about a fortnight, and the young worms 
