. Fig. 4.—The basal portion of a fly's wing. a, axillary lobe; h, alula ; c, antitegula ; d, tegula. The alulce, tegulce (or squama;), and halteres.—The basal corner of the hind margin of the wing is often well developed, at times forming quite a projecting angle, and this part is known as the * In the case of Vtychoptcra, the 6th longitudinal vein being absent, there are only two cells altogether between the 5th vein and the hind angle of the wing, namely the anal and axillary cells.

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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdiptera, bookyear1912