. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 44 MASS. EXPERIMENT STATION BULLETIN 353. Birch Skeletonizer 1. Vacant mine of larva in birch leaf. 4X. 2. Fully grown larva with first (lower) and second (upper) vacant molting webs on birch leaf. 4X. Figs. 1 and 2. Courtesy, Conn. Agr, Expt. Station. 3. Birch leaf skeletonized by larvae, showing webs and the ribbed cocoons. Enlarged. Courtesy, Mich. Agr. Expt. Station. The eggs are laid singly and scattered over the leaf. They are translucent white when first laid but soon become quite opaque, are flatl
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 44 MASS. EXPERIMENT STATION BULLETIN 353. Birch Skeletonizer 1. Vacant mine of larva in birch leaf. 4X. 2. Fully grown larva with first (lower) and second (upper) vacant molting webs on birch leaf. 4X. Figs. 1 and 2. Courtesy, Conn. Agr, Expt. Station. 3. Birch leaf skeletonized by larvae, showing webs and the ribbed cocoons. Enlarged. Courtesy, Mich. Agr. Expt. Station. The eggs are laid singly and scattered over the leaf. They are translucent white when first laid but soon become quite opaque, are flatly ovoid in shape and about 1/100 inch in diameter. They are encircled by an adhesive substance which attaches them to the leaf surface. The newly hatched larva, or caterpillar, which mines in the tissues of the leaf, is very tiny. It is translucent, flattened, and legless — a typical leaf-mining. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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