. 
! 
- flat, with the segments 
ts 
ond or third segment, 
the last three segments 
rounder and narrower 
‘than the preceding. 
THE TRUMPET LEAF-MINER OF THE APPLE. 25 
are greenish yellow in color and somewhat translucent. In some 
lights they are irridescent, as are the empty egg shells. One or two 
days previous to hatching they become comparatively conspicuous, 
the embryo being central and the whitish margin showing plainly 
against the dark color of the leaf. The empty shells are white and 
mark the beginning of the mine. The average size (based on meas- 
urements of five eggs) is 0.34 mm. by 0.54 mm. The eggs are at- 
tached closely to the leaf, usually in furrows along a veinlet, but 
occur more or less promiscuously. This stage has not previously been. 
described. 
The larva—tThe larva (fig. 9, ¢) upon hatcning measures about 
0.7 mm. in length. The head is brownish, the rest of the body whit- 
ish, except cervical and anal shields, which are dusky. Full-grown 
—larve will average 5 mm. in length by 1 mm. in width across the 
third thoracic segment. The head is about 0.5 mm. wide, retractile,' 
bilobed, brownish or even black in color. The general color of the 
body is light green, ex- 
cept cervical and anal 
shields, which are 
brownish. The body is 
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Wr 
7 
very distinct, and taper- 
ing caudad from the sec- 
Fic. 9.—Trumpet leaf-miner of the apple (Tischeria malifo- 
é : liella): Adult, larva, pupa, details. 
Thoracic segments with 
three long sete on each side; succeeding segments with two setz on 
each side varying considerably in length; at caudal end there are 
humerous shorter curved setw. Thoracic legs absent. Abdominal 
and anal legs marked by five pairs of crochets (see fig. 9, c, d). 
The pupa.—The pupa is rather variable in size, the average of five 
being 3.35 mm. by 0.95 mm. The color when first formed is rather 
uniformly pea green, later becoming much darker, varying with age. 
The general color of the thoracic region and head is dark brown to 
blackish. The abdomen is dark green, yellowish caudad; the caudal 
margin of the rather distinct segments is brown. Leg and wing 
sheaths free; tip of third pair of legs reaching to cephalic border of 
third segment from last. The antennal sheaths reach the cephalic 
margin of the fifth segment from last. The spiracles are on slight 
conical elevations, and on each side of abdomen, ventrad of spiracles, 
isa row of long slender seta, a pair to each segment. Cremaster of 
two stout short projections, slightly curved at tip. Head obtusely 
si 10090—Bull. 68—09——3 
