. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. STRUCTURE, GROWTH AND ECONOMICS OF INSECTS 25. Fig. 29.—Digestive canal of Gryllus pennsylvanicus. Salivary duct; Oes., oesophagus; Sg., salivary gland; C, crop; pv., ;, proventriculus; gc, gastric caeca; m., mesenteron; Mv., valve between two divisions of the mesenteron; gl., digestive glands; il., ilium; , duct of malpighian tubules; ut., malpighian tubules; Col., colon; rt., rectum; An., Please note that these images are extracted from scanned page images tha
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. STRUCTURE, GROWTH AND ECONOMICS OF INSECTS 25. Fig. 29.—Digestive canal of Gryllus pennsylvanicus. Salivary duct; Oes., oesophagus; Sg., salivary gland; C, crop; pv., ;, proventriculus; gc, gastric caeca; m., mesenteron; Mv., valve between two divisions of the mesenteron; gl., digestive glands; il., ilium; , duct of malpighian tubules; ut., malpighian tubules; Col., colon; rt., rectum; An., 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 Lochhead, William, 1864- [from old catalog]. Philadelphia, P. Blakiston's son & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
