. Bulletin - United States National Museum. Science. Fig. U.—The Plum Curculio. Conotrache' h(s' nenuphar, a. larva; b, pupa; c, beetle; d, phim showing egg-puncture and crescent. all the tarsi are o-joiuted; (2) Heteeomera, with the four ante- rior 5-joiuted and the two posterior 4-jointed; (3) Pseudo-tetra- MERA, with apparently only four joints to all the tarsi, though, in reality, there is a fifth penultimate joint, diminutive and concealed; (4) Pseudo-trimera, with apparently only three joints to all the tarsi. This system, like most others, is not perfect, as there are numerous spe- cies
. Bulletin - United States National Museum. Science. Fig. U.—The Plum Curculio. Conotrache' h(s' nenuphar, a. larva; b, pupa; c, beetle; d, phim showing egg-puncture and crescent. all the tarsi are o-joiuted; (2) Heteeomera, with the four ante- rior 5-joiuted and the two posterior 4-jointed; (3) Pseudo-tetra- MERA, with apparently only four joints to all the tarsi, though, in reality, there is a fifth penultimate joint, diminutive and concealed; (4) Pseudo-trimera, with apparently only three joints to all the tarsi. This system, like most others, is not perfect, as there are numerous spe- cies not possessing" five joints to the tarsi belonging to the first section; and for practical purposes beetles may be very well arranged according to habit. We thTiS get, first, the Adephaga, or carniv- orous species, including all those which prey on other living insects, and to which, following Mr. Walsh, I have^ for obvious reasons, applied the suggestive term 'Cannibal'; second, the Xecrophaga, comprising those which feed on carrion, dung, fungi, and decaying vegetation; third, the Phytophaga, embracing all those feeding on living vegetation. This arrangement is by no means perfect, for there are beetles which are car- nivorous in the larva and herbivor- ous in the imago state; while some of the Kecrophaga are actually para- sitic. Yet, it is not more artificial than others which have been proposed. The carnivorous species, broadly speaking, are Pentamerous, the only striking exception being the Coccinellidfe (Lady-birds), which are Pseudo-trimerous. The carrion-feeders are also Pentamerous; but veg-. FiG. 12.—A Soldier - beetle, GhauUognathus pennsylvanicits. a, larva; &-/i, parts of larva enlarned; i, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smi
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
