Publisher's Synopsis
Excerpt from The Head-Capsule of Coleoptera
In order to reach a correct estimate Of the degree of specialization of the various parts Of the head-capsule, an hypothetical type, representing a supposed primitive condition, has been constructed. The structure of this hypothetical type is based on the structure Of the head-capsule of generalized insects and of generalized adult and larval Coleoptera. Each structure has been treated separately, starting from the hypothetical type. The submentum has been included in this study because Of its bearing on certain developmental processes. All statements made refer to the species listed under materials only. The material studied was soaked in a 10% solution Of potassium hydroxide until clarified, then washed in distilled water to remove the hydroxide, and preserved in 70% alcohol. All dis sections were made under a binocular microscope in 70% alcohol in Syra cuse Watch-glasses.
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