DIY History | Transcribe | Scholarship at Iowa | The terrestrial Adephaga of Iowa (Part 1) by Fanny Chastina Thompson Wickham, 1895 | The terrestrial Adephaga of Iowa by Fanny Chastina Thompson Wickham, 1895, Page 5

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The terrestrial Adephaga of Iowa (Part 1) by Fanny Chastina Thompson Wickham, 1895

The terrestrial Adephaga of Iowa by Fanny Chastina Thompson Wickham, 1895, Page 5

the following regions, the back part or the occiput, the middle or vertex and the anterior or front; and on each side are the eyes.
The eyes of Coleptera are variable in size and form. They may be either simple or compound. When the latter they are composed of an aggrigation of surhexagonal or quadrangular facets (Packard) fitted against each other perfectly. Each facet is the cornea of the distinct eye. The number of facets varies from 50 to 30,000 (Comstock). Rarely are the compound eyes wanting and equally rarely are accessory or simple eyes seen. When present they are situated between the compound eyes on the upper surface and are known as ocelli.
The undersurface of the head is widely excavated, forming the mouth; the parts between the eyes and behind the mandibles are the genae; behind the mouth or immediately below the occiput is the throat or gula; the gular suture separating the throat from the mentum.
These constitute the fixed portions of the head, the movable parts are the antennae and mouthparts.

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the following regions, the back part or the occiput, the middle or vertex and the anterior or front; and on each side are the eyes. The eyes of Coleptera are variable in size and form. They may be either simple or compound. When the latter they are composed of an aggrigation of surhexagonal or quadrangular facets (Packard) fitted against each other perfectly. Each facet is the cornea of the distinct eye. The number of facets varies from 50 to 30,000 (Comstock). Rarely are the compound eyes wanting and equally rarely are accessory or simple eyes seen. When present they are situated between the compound eyes on the upper surface and are known as ocelli. The undersurface of the head is widely excavated, forming the mouth; the parts between the eyes and behind the mandibles are the genae; behind the mouth or immediately below the occiput is the throat or gula; the gular suture separating the throat from the mentum. These constitute the fixed portions of the head, the movable parts are the antennae and mouthparts.