Pupal spur of C. maturus>.

Mouthparts and anal tubule of C. maturus.
a. Pecten epipharyngis - note sharp even teeth; b. Antenna; c. Mentum - note 4th laterals not reduced (type I), c1 tooth tall and narrow, and c2 teeth separate from c1 (type III);
d. Mandible - note 3rd inner tooth is separated and darkened (type IIIB).

C. maturus ventromentum (above) and premandible (below)
(courtesy I. Proulx)

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