Synopses & Reviews
Synopsis
Excerpt from The Grass Thrips, Anaphothrips Striata
Their mouth parts (plate III., figs. 19, 20, 21 and 22) are inter mediate in form between those of sucking and of chewing insects, but they probably take their food by suction. The mouth parts and other structures of the head are in part asymmetrical, a fact of considerable interest, as is also the location of the stigmata (plate I., figs. 1 and These are situated in adults upon the anterior angle of each side of the mesothorax and on each side of the first and eighth abdominal segments. A fourth pair, which is less conspicuous, is found upon the metathorax behind the place of attachment of the hind wings. In the larvae the abdominal stigmata are found upon the second and eighth segments.
The metamorphosis also is interesting. The larva resembles the adult in form, and has similar mouth parts and food habits. The pupa, however, takes no nourishment, and is enclosed in a transparent skin, which is finally moulted as the insect reaches the adult form. The pupae of some species possess a slight power of motion, their movements being very sluggish and uncertain others are entirely motionless, and appear to have a nearly complete metamorphosis.
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