. The bee-keeper's guide : or Manual of the apiary . Bee culture; Bees. 62 Appendages of the Thorax. APPENDAGES OF THE THORAX. The organs of flight are the most noticeable appendages of the thorax. The wings are usually four, though the Diptera have but two, and some insects—as the worker- ants—have none. The front or primary wings (Fig. 4, A") are usually lai-ger than the secondary or hind wings (Fig. 4, j5), and thus the mesothoracic or middle ring of the thorax, to which they are attached, is usually larger than the metathorax or third ring. The wings consist of a broad frame-work of v
. The bee-keeper's guide : or Manual of the apiary . Bee culture; Bees. 62 Appendages of the Thorax. APPENDAGES OF THE THORAX. The organs of flight are the most noticeable appendages of the thorax. The wings are usually four, though the Diptera have but two, and some insects—as the worker- ants—have none. The front or primary wings (Fig. 4, A") are usually lai-ger than the secondary or hind wings (Fig. 4, j5), and thus the mesothoracic or middle ring of the thorax, to which they are attached, is usually larger than the metathorax or third ring. The wings consist of a broad frame-work of veins (Fig. 4), covered by a thin, tough membrane. The main ribs or veins are variable in Fk;. I ^.. Muscles oj Thorax, ajler Wolff. L Muscles to raise front wing. D Muscles to lower front wing. A Muscles of hind wing, number, while towards the extremity of the wing are more or less cross-veins, dividing this portion of the wings into more or less cells. In the higher groups these cells are few, and quite iinportant in classifying. Especially useful in grouping bees into their families and genera, are the cells in the second row, from the front or costal edge of the primal y wings, called the sub-costal cells. Thus in the genus Apis there arc three such cells (Fig. 4, A, 6, 7, 8), while in the ]Mclipona there are only two. The ribs or veins consist of a tube within <i tube, the inner one form- ing an air tube, the outer one carrying blood. On the costal. 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 Cook, Albert John, 1842-1916. Chicago, Ill. : George W. York & Co.
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectbees, bookyear1894
