Michin, Edward A. Note on a new organ, and on the structure of the hypodermis, in Periplaneta orientalis. (Quart. Journ. Micros. Sc., Dec., 1888, xxiv, 1 Pl.)
—— Further observations on the dorsal gland in the abdomen of Periplaneta and its allies. (Zool. Anz., 27 Jan., 1890, pp. 41–44.)
Maynard, C. L. The defensive glands of a species of Phasma, Anisomorpha buprestoides. (Contributions to Science, i, April, 1889.)
Schaeffer, Cæsar. Beiträge zur Histologie der Insekten. (Zool. Jahrb. Morph. Abth. iii, pp. 611–652, Taf. xxix, xxx, 1889; treats of the ventral glands in prothorax of caterpillars; scales and hairs are secretions from the very greatly enlarged hypodermic cells.)
Gilson, G. Les glandes odorifères der Blaps mortisaga et de quelques autres espèces. (La Cellule, v. pp. 1–21, 1 Pl., 1889.)
—— The odoriferous apparatus of Blaps mortisaga. (Rep. 58th Meeting Brit. Assoc. Adv. Sc., 1889, pp. 727, 728.)
Haase, Erich. Ueber die Stinkdrüsen der Orthoptera. (Sitzgsber. Ges. Naturf. Freunde, Berlin, pp. 57, 58, 1889.)
—— Zur Anatomie der Blattiden. (Zool. Anz., xii Jahrg., pp. 169–172, 1889.)
Herbst, Curt. Anatomische Untersuchungen an Scutigera coleoptrata. Ein Beitrag zur vergleichenden Anatomie der Articulaten. Dissert., Jena, pp. 36 (Hautdrüsen, Coxal-Organ.); p. 1, 1889.
Wheeler, William M. Hydrocyanic acid secreted by Polydesmus virginiensis Drury. (Psyche, v, p. 422.)