. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Head, glistening light orange; ocelli minute, black, on a dark orange base. Antennae, light straw on the two proximal segments, orange at the tip. Mandibles, black. A few colorless setae occur over the face. The first body segment bears a rough scutellum which is concolorous with the body. This is edged posteriori}- and later- all}' with a brownish black narrow border, and anteriorl}' b}' a wide black border. There are two conspicuous longitudinal stripes along the body, one on each side of th
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Head, glistening light orange; ocelli minute, black, on a dark orange base. Antennae, light straw on the two proximal segments, orange at the tip. Mandibles, black. A few colorless setae occur over the face. The first body segment bears a rough scutellum which is concolorous with the body. This is edged posteriori}- and later- all}' with a brownish black narrow border, and anteriorl}' b}' a wide black border. There are two conspicuous longitudinal stripes along the body, one on each side of the olive mid-dorsal area. These are a light chocolate-brown. A third line of similar character runs stig- matally, but is broken into dark spots on the first three segments. Colorless setae, each one arising from a large round black spot, are sparsel}" scattered over the body. Legs concolorovis with the body, their tips somewhat darker. Prolegs, light olive, the crochets black. Pupa, length 15 mm.; c}'lindrical, light bro\vn. All seg- mental junctures are narrowl}' edged with darker brown. Spir- acles, inconspicuous, only slightly darker than ground color. There are apparentl}' no setae on an}- portion of the bod}-. The cremaster bears a single small hook. The lar\-a is illustrated on Plate 28. and the pupa on Plate 29. The larva feeds within the hollow tubular cavity of the Giant Rye Grass. It begins this feeding usually in younger green stalks, transfers later to older stalks, in which pupation sometimes occurs. Quite frec|uentlv however it cuts into old hard dead stalks before pupating. The pupal chamber is sealed below the larva by a pithy plug. Above the larva there is woven a delicate silk diaphragm which closes ofif the channel. Frequently two such partitions are con- structed. Above this is the exit window which has been gnawed by the larva from the inside. This is cut to paper thinness and scored around the margin so that a slight push from within will open it. The
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Keywords: ., bookcentury1900, bookdecade1900, books, booksubjectnaturalhistory
