Cholodkovsky, on head, [87];

on styles of cockroach, [224];

on embryology of Phyllodromia, [237];

on morphology of sting, [493]

Chordeuma, [31]

Chordeumidae, [44]

Chordotonal organs, [121]

Chorion, [144]

Chorisoneura, [240]

Chromosomes, [146]