. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE TRUMPET LEAF-MINER OF THE APPLE. 25 are greenish ^'ellow in color and somewhat transhicent. 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 empt}' shells are white and mark the beginning of the mine. The average size (based on meas- urements of five eggs) is 0,34: nnn. by mm. The eggs are at- tached closely to
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE TRUMPET LEAF-MINER OF THE APPLE. 25 are greenish ^'ellow in color and somewhat transhicent. 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 empt}' shells are white and mark the beginning of the mine. The average size (based on meas- urements of five eggs) is 0,34: nnn. by mm. The eggs are at- tached closely to the leaf, usually in furrows along a veinlet, but occur more or less Dromiscuousl3\ This stage has not previously been â described. The larva.âThe larva (fig. 0, c) upon natcnmg measures about nnn. in length. The head is brownish, the rest of the body whit- ish, excei^t cervical and anal shields, which are dusky. Full-grown larva? will average 5 mm. in length by 1 mm. in width across the third thoracic segment. The head is about 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 flat, with the segments verj' distinct, and taper- ing caudad from the sec- ond or third segment, the last three segments rounder and narrower than the preceding. Thoracic segments with three long seta? on each side; succeeding segments with two setae on each side varying considerably in length; at caudal end there are numerous shorter curved seta?. Thoracic legs absent. Abdominal and anal legs marked bj- five pairs of crochets (see fig. 9, c, d). The pupa.âThe pupa is rather variable in size, the average of five being mm. by 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
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
