Directions for collecting and preserving insects . FIG. 22.—Thrips striatim, with wings enlargedat side. [19] COLLECTING AND PRESERVING INSECTS FIG. 23.—A Mosquito (Culex pipiens). a,ailult; 6, head of same enlarged; e, portionof antenna of sanu-: /. larva; g, pupa.(After Westwood.) The pupa3 are somewhat sluggish and the limbs and wings are en-closed in a thin membrane which is expanded about the feet into bulb-ous enlargements, giving rise to the name bladder-footed (Physo-poda) applied to these insects by Burmeister. Order DIPTERA (Hi?, twice; -r^;-,, wing) or Two-winged o
Directions for collecting and preserving insects . FIG. 22.—Thrips striatim, with wings enlargedat side. [19] COLLECTING AND PRESERVING INSECTS FIG. 23.—A Mosquito (Culex pipiens). a,ailult; 6, head of same enlarged; e, portionof antenna of sanu-: /. larva; g, pupa.(After Westwood.) The pupa3 are somewhat sluggish and the limbs and wings are en-closed in a thin membrane which is expanded about the feet into bulb-ous enlargements, giving rise to the name bladder-footed (Physo-poda) applied to these insects by Burmeister. Order DIPTERA (Hi?, twice; -r^;-,, wing) or Two-winged only order having but two wings, the hind pair replaced by a pairof small, slender filaments clubbed attip, and called halteres, poisers, or bal-ancers. ]So order surpasses this in thenumber of species or in the immenseswarms of individuals belonging tothe same species which are frequentlymet with. The wings, which are vari-ously veined, though appearing nakedto the unaided eye, are often thicklycovered with very minute hairs orhooks. As an order the Diptera aredecidedly injurious to man, whetherwe consider the annoyances to our-selves or our a
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Keywords: ., bookauthorrileycha, bookcentury1800, bookdecade1890, bookyear1892
