Smithsonian miscellaneous collections . STI— DCD--m -BCD MH EH. 15 /X X\ LABIUM |6 Figs. 13-16.—Mouth parts. 13 and 15, Aboral views; 14 and 16, adoral views. maining area is unpigmented and adorned with a few scattered micro-scopic hairs. The squames (SQ) are a pair of convex sclerites, which, accordingto Tillyard (1917), correspond to the palpigers. (The term squames NO. 6 MORPHOLOGY OF THE DRAGONFLY—CHAO 13 is rather confusing since it has been used to designate different struc-tures in different orders of insects.) Aborally (fig. 15) they aresubrectangular in shape, mesobasally fused with
Smithsonian miscellaneous collections . STI— DCD--m -BCD MH EH. 15 /X X\ LABIUM |6 Figs. 13-16.—Mouth parts. 13 and 15, Aboral views; 14 and 16, adoral views. maining area is unpigmented and adorned with a few scattered micro-scopic hairs. The squames (SQ) are a pair of convex sclerites, which, accordingto Tillyard (1917), correspond to the palpigers. (The term squames NO. 6 MORPHOLOGY OF THE DRAGONFLY—CHAO 13 is rather confusing since it has been used to designate different struc-tures in different orders of insects.) Aborally (fig. 15) they aresubrectangular in shape, mesobasally fused with the basal portion ofthe mentum, laterally deflected to approach the sclerites of the mentumon the adoral side. The lateral lobes (LL) are a pair of hairy sclerotized structuresattached to the squames and mentum, with their mesal margins straightand their lateral margins strongly convex. Each lobe is producedmesoapically into a very long, bare, and sharp end hook (EH) point-ing meso-orally. Lateral to the end hook is an even longer hairymovable hook (MH) w
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Keywords: ., bookcentury1800, bookdecade1860, bookidsmiths, booksubjectscience
