19 
fierior segments narrow rapidly forwards, the one next the head 
ng at its apex less than half the diameter of the fourth. The 
:ee posterior segments are also somewhat narrowed, the penulti- 
l,te being about three-fourths the diameter of the second preceding. 
Che head (Fig. 4) is provided beneath with the pair of black, 
»thed hooks common to many dipterous maggots. The antennae are 
*y short, scarcely longer than broad, two-jointed, the second joint 
iensile. There are two circular, apparently sensory areas below 
j antennae upon the front of the head, doubtless representing 
ixillary palpi. The mouth is beneath the. head, sucker-like in 
m. The last or anal segment is divided into two lobes, and bears 
on its posterior surface two breathing-pores or spiracles, each 
arded by a circlet of about twelve depressed spines. The surface 
the larva is entirely smooth and shining, except for some very 
e transverse ridges ‘on the under side of the segments, evidently 
3ful in locomotion. On each side of the base of the second seg- 
■nt is a small, gill-like appendage, divided into two lobes, each 
•e with six divisions. 
D upa. (Plate I, Figs. 6, 7 and 8). The pupa of this species is 
at is technically known as a* coarctate pupa, contained within 
) last skin of the larva, which is not shed previous to transform- 
on, but remains as a protective envelope for the forming pupa, 
the latter shows through its case, the color is green, except at 
} ends, where, with the growth of the pupa within, the case is 
b empty and transparent. It is about one-sixth of an inch long 
one-fifth that width, and divided into ten clearly recognizable 
gnents. The anterior of these, corresponding to the head and 
it segment of the larva, is yellowish, shrunken, and corrugated, 
out half the width of the third segment. The second and third 
3 obscurely divided, the first being short, and narrowing rapidly 
ward. Within it are observed the retracted maxillae of the old 
va. 
The remaining segments to the eighth are about equal in length, 
)arated by deeply impressed sutures at first, the anterior sutures 
coming gradually obliterated as the enlargement of the head and 
>rax of the pupa within distends the envelope. The ninth seg- 
;nt is the longest of all, the tenth being nearly equally long, but 
rrower, and shrunken and wrinkled on its posterior border. The 
venth, representing the twelfth of the larva, is only a brown and 
Tugated rudiment. As the development of the pupa approaches 
npletion, the eyes, wing-pads and legs are visible through the 
nsparent covering, but they form no elevations of the surface. 
LIFE HISTORY. 
I 
'It ** • . 
Larva. My first acquaintance with the larva of this fly dates 
m March 12, 1883, at which time Mr. D. S. Harris, of Cuba, 
\lton county, informed me that lie had received from farmers in 
II vicinity specimens of winter wheat which had been killed by a 
all, slender, footless maggot, infesting the plants just above the 
)t. M my request, he kindly sent me examples of the injured 
ieat containing the larvae, and these w r ere received on the 20th of 
