. Cuvier's animal kingdom : arranged according to its organization. Animals. DIPTERA. 627 Chiromyza, Wied., has the antennae with five distinct joints. Pachystomus, Latr., has the antennae 3-jointed, the third joint divided into tliiee annuli. The larva of P. si/r- phoides, Pz., lives beneath the bark of the pine ; its pupa resembles that of the Tabani. The second section, Decatoma, Latr., has the antennae always composed of three joints, the last being longer, without a style or seta, and divided into eight annuli, clavate in some, and nearly cylindric, or elongate-conic in others. The wings
. Cuvier's animal kingdom : arranged according to its organization. Animals. DIPTERA. 627 Chiromyza, Wied., has the antennae with five distinct joints. Pachystomus, Latr., has the antennae 3-jointed, the third joint divided into tliiee annuli. The larva of P. si/r- phoides, Pz., lives beneath the bark of the pine ; its pupa resembles that of the Tabani. The second section, Decatoma, Latr., has the antennae always composed of three joints, the last being longer, without a style or seta, and divided into eight annuli, clavate in some, and nearly cylindric, or elongate-conic in others. The wings are generally incumbent on the body, and the tarsi have three pulvilli. They may be united into a single genus— Xylophagus. Hermetia, Latr., has the antennae much longer than the head, with the two first joints very short, and the third very long and compressed ; the scutellum is narrowed. The antennae in the others are never much longer than the head, and terminated by a nearly cylindric, or elongate-conic joint. Some have the scutellum not spined. Xylophagus proper, has the body long and narrow, with the antennae rather longer than the head, terminated by a subcylindric joint. X. ater, Latr. Acanthomera, Wied., has the antennae at least as long as the head, and terminated by a joint in the form of an elongate cone ; the first joint larger than the others ; the abdomen broad and flattened ; the face with a pointed beak ; the two joints of the palpi of equal size. Raphiorhynchu^, Wied., has the basal joint of the palpi very short, and the second much longer, and terminated in a point. The species of this and the preceding are of large size, and inhabit South America. The others have the scutellum armed with spines. Ccenomyia, Latr. (Sicus, Fabr.), are closely allied to the two preceding subgenera ; the antennae scarcely longer than the head ; the palpi very visible, cylindric, pointed at the tip, with two equal-sized joints. The scutellum has two spines. S. ferrugineiis, Fab.
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