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The proprioceptive function of a campaniform sensillum is to perceive stresses and changing forces on the cuticle, facilitating insect locomotion including walking and flight. In the aphid genus Mindarus (Hemiptera: Aphididae), campaniform sensilla are often clustered in groups and are found at specific locations on the insect's appendages. Ring-shaped, approximately 5µm in diameter, these sensilla are found in predictable numbers on the pedicel (1), the trochanter (4), the femur (2–4), and the distitarsus (1). Those situated on the wings are variable in number and size. The wing sensilla form five identifiable groups: four on the forewing and one on the hindwing, with an average of 4 or 6 sensilla per group. Light and electron scanning microscopy was conducted to reveal their external anatomical detail. The pattern and distribution of campaniform sensilla does not appear to inform Mindarus taxonomy.

The valid scientific name for the hemlock woolly adelgid is affirmed to be Adelges tsugae Annand. A discrepancy between the names Adelges funitectus (Dreyfus) and A. tsugae in the historical literature is investigated and resolved. The generic (or subgeneric) name Aphrastasia should not be applied to Adelges tsugae, as this species is not closely related to Adelges pectinatae (Cholodkovsky), the type species of Aphrastasia. We propose Annandina subgen. nov. for A. tsugae.

The genus-group name Chermes Linnaeus 1758 has been suppressed, but an accounting of the various nominal species described in combination with it has not been presented until now. Nominal species of Chermes are found in 13 families of three major lineages of Sternorrhyncha (Aphidomorpha, Coccoidea, Psylloidea). Eleven available names remain unplaceable (incertae sedis nomina dubia) and to date do not appear in the various Sternorrhyncha catalogues. In order to clarify their status, we here present an annotated list of the 137 nominal species-group names originally described in combination with Chermes. We provide the original bibliographic citation and an assessment of the current status of each name.

The genus Chortinaspis Ferris from China is reviewed and a new species, Chortinaspis tianmuensis Wei & Feng, sp. nov., is described. Chortinaspis biloba Maskell is also redescribed from specimens collected in China. A key to the species of Chortinaspis and a checklist of all known species of the world is provided.