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Fig. 55.—A, maxilla of Mantispa brunnea. B, Ascalaphus longicornis. C, Myrmeleon diversum. Lettering as in Fig. 54.

Fig. 56.—Maxilla of a carabid, Anophthalmus tellkampfii: l, lacinia; g, 2–jointed galea; p, palpus; st, stipes; c, cardo.

Fig. 57.—Maxilla of Nemognatha, ♀, from Montana. A, base of maxilla enlarged to show the taste-papillæ (tp) and cups (tc), on the galea (ga). B, part of end of galea to show the imperfect segments and taste-organs: n, nerve; a ganglionated nerve supplies each taste-papilla or cup; l, lacinia; p, palpifer; s, subgalea.

Fig. 58.—Maxilla of Panorpa.

Fig. 59.—Maxilla of Limnephilus pudicus: mx, stipes; lac, galea.

The palpus is in general antenniform and is composed of from 1 to 6 joints, being usually 4– or 5–jointed, and is much longer than the galea. In the maxilla of the beetle Nemognatha (Fig. 57), the galea is greatly elongated, the two together forming an imperfect tube or proboscis and reminding one of the tongue of a moth, while the lacinia is reduced. In the Mecoptera the lacinia and galea are closely similar (Fig. 58); in the Trichoptera only one of the lobes is present (Fig. 59), while in the Lepidoptera the galea unites with its mate to form the so-called tongue (Fig. 60). The maxilla of the male of Tegeticula yuccasella is normal, though the galeæ are separate; but in the female, what Smith regards as the palpifer (the “tentacle” of Riley) is remarkably developed, being nearly as long as the galea (Fig. 61) and armed with stout setæ, the pair of processes being adapted for holding a large mass of pollen under the head.