The inner lobe (lacinia) of the first maxilla terminates in an articulated hook, while in the second maxillae (labium) both inner and outer lobes ("ligula" and "para-glossae") are much Gyrinus sulcatus reduced.
The larva of Gyrinus (fig.
Genera: (a) Scarabaeus, Lucanus, Dermestes, Hister, Byrrhus, Gyrinus, Attelabus, Curculio, Silpha, Coccinella; (b) Bruchus, Cassida, Ptinus, Chrysomela, Hispa, Meloe, Tenebrio, Lampyris, Mordella, Staphylinus; (c) Cerambyx, Leptura, Cantharis, Elater, Cicindela, Buprestis, Dytiscus, Carabus, Necydalis, Forficula.
It required the extraordinary acumen of the great Cuvier at once to recognize, when the first specimens of the Gyrinus edulis .
Francisco Hernandez (1514-1578) has alluded to it as Gyrinus edulis or atolocatl, and as lusus aquarum, piscis ludicrus, or axolotl, which latter name has remained in use, in Mexico and elsewhere, to the present day.
You can even detect a water-bug (Gyrinus) ceaselessly progressing over the smooth surface a quarter of a mile off; for they furrow the water slightly, making a conspicuous ripple bounded by two diverging lines, but the skaters glide over it without rippling it perceptibly.