. Elementary entomology . « - "'^ .c .^' 5- ?^ </-^ •^^^^mm 0 1 \ ji ^J 'Y <X "^ 01^ 1 % '^ % ? SJ' 1 4J to '^"V-/ ^ 1 '? ^ \ 7^1 0) r2 ^ o> / cJ5 o \ / d N \^ £ the mesothorax and metathorax of most adult insects bear a pair of wings. The prothorax is usually smaller than the two posterior seg- ments, the relative size of which de- pends upon which pair of wings is the better developed. The dorsal surface, or back, of a tho- racic segment is called the tcrgutn, or notiiin, the ven- tral or under sur- face is the stejiinni, and each side is a plcnnnn. These parts are fu
. Elementary entomology . « - "'^ .c .^' 5- ?^ </-^ •^^^^mm 0 1 \ ji ^J 'Y <X "^ 01^ 1 % '^ % ? SJ' 1 4J to '^"V-/ ^ 1 '? ^ \ 7^1 0) r2 ^ o> / cJ5 o \ / d N \^ £ the mesothorax and metathorax of most adult insects bear a pair of wings. The prothorax is usually smaller than the two posterior seg- ments, the relative size of which de- pends upon which pair of wings is the better developed. The dorsal surface, or back, of a tho- racic segment is called the tcrgutn, or notiiin, the ven- tral or under sur- face is the stejiinni, and each side is a plcnnnn. These parts are further divided by sutures into distinct plates, or sclcrites, to which the appendages are articulated. The de- velopment, shape, size, and position of these sclerites are characters of such uniformity that the sclerites are used in classifying in- sects, in much the same way as are the bones of the vertebrate animals.
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
