Grouped glands: see circumgenital glands.
Grub: an insect larva: a term loosely applied, but more specifically to larvae of Coleopteran and Hymenoptera.
Guanin: a white amorphous compound which occurs in the transparent areas of some wings, giving a milky tinge, and is also found in the photogenic organs of Lampyridae: an excretory substance, composition C5H5N5O (von Furth).
Guest: applied to those insects that live in nests or dwelling places of other species, not necessarily at the expense of the host.
Gula: the throat: that sclerite forming the central portion of the head beneath, extending from the submental to the posterior margin, and laterally bounded by the genae.
Gular peduncle: in Coleopteran = submental peduncle.
Gular suture: the line of division between the gulag or throat and the gene or cheeks.
Gulf strip: see semitropical or gulf strip.
Gullet: = oesophagus; q.v.
Gulo-mental: includes the region covered by the gulag and mentum.