Heymons considers that it represents the sternites of the three trophal segments, and that the gula is merely a secondary development. [Please select]
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Abdominal tergites and sternites each with four transverse rows of microscopic setæ; lateral spiracles on segments two to seven. [Please select]
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The basal ring of sternites two to eight bears a transverse band or area of microscopic chitinized spicules, the one on the eighth segment split lengthwise by a capillary line. [Please select]
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