. Annual report. 1st-12th, 1867-1878. Geology. DESCRIPTIOX OF NEW INSECTS. By a. S. Packard, Jr., M. D. DIPTEROUS LARVA FOUND IN THE GIZZARD OF PICOIDES ARCTICUS. Fig. G5, a, dorsal, h, ventral view of larva; c, end of body; d, side view of end of body magnified. e, dorsal view of end of body; /, bead, greatly Fig. Body white^ cylindrical, a little flattened, with twelve segments exclu- sive of head, the segments moderately convex. Head very minute, sunken in the small pro- thoracic segment, (which is much smaller than the c second or mesothoracic T^j^ segment;) subtrianguhuy"^—'N in
. Annual report. 1st-12th, 1867-1878. Geology. DESCRIPTIOX OF NEW INSECTS. By a. S. Packard, Jr., M. D. DIPTEROUS LARVA FOUND IN THE GIZZARD OF PICOIDES ARCTICUS. Fig. G5, a, dorsal, h, ventral view of larva; c, end of body; d, side view of end of body magnified. e, dorsal view of end of body; /, bead, greatly Fig. Body white^ cylindrical, a little flattened, with twelve segments exclu- sive of head, the segments moderately convex. Head very minute, sunken in the small pro- thoracic segment, (which is much smaller than the c second or mesothoracic T^j^ segment;) subtrianguhuy"^—'N in form, a little longer J than broad; a transverse ^?~--—^ suture just in front of in- sertion of anteniue indi- cates the posterior edge of the clypeus. Antennae cylindrical, two-jointed, the second joint longer than basal, and rather slenderer, its tip reaching as far as the end of the head. Terminal segment of the body much smaller and narrower than the penultimate, bearing two large, stout, upcurved corneous hooks, with adjoining bases; nine stigmata, one on prothorax and one on first eight abdominal segments, round minute, corneous, the ninth round, with around area on one side. Length .35 inch; 135 specimens taken ''from the gizzard of Picoides arcticus, (No. 23G,) Lower Geyser Basin, August 20, 1872, by 0. U. ; Some of these larvi© were half grown. Most of them were l)erfectly preserved; a few had been partially digested. With them v>'ere associated a part of the bodj' of a Gerambycid larva, and a i)ortiou of the elytra of a Scolytuslike beetle, so that they must have come from under the bark of some tree. This larva, remarkable for its large size, its minute head, and terminal upfcurved hooks, like those of many coleopterous larva? living under bark, seems to be related to the young of the Cecidomyiadw, or perhaps a closely allied group, from the two-jointed antenna', the general form of the minute head, and the presence of nine stigmata. Several Cec
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishe, booksubjectgeology
