Transactions of the American Entomological Society, 17. köide

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Society at the Academy of Natural Sciences, 1890
 

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Page 343 - Station. ^Bulletin from the Laboratories of Natural History of the State University of Iowa Vol.
Page 314 - History," is given as representing more clearly and definitely than any other, an account of the present state of our knowledge of the structure of the Dipterous mouth.
Page 135 - W-shaped or dentate. The outer line at apical fourth is once more strongly indented below costa. The black component lines do not seem to be more distinct on one side than on the other of the pale included bands or spaces. The median field is blackish, becoming pale towards the outer line ; it shows a pale, sometimes whitish cellular spot, surmounted with raised scales. It can be seen that these raised scales (easily lost in setting the insect) accompany the median lines as well as forming the discal...
Page 135 - The larva has three pair of thoracic or true jointed feet, and four abdominal or false feet, besides anal claspers. This larva, eating on the inner side of the bark, and making furrows in the wood, causes the bleeding which, when the depletion is excessive or continuous, and especially in the case of young trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of exuding pitch, which seems to act as a protection to both the larva and the chrysalis.
Page 128 - Then one fourth of the distance to the body a waving light cinereous band parallel to the exterior margin, marked on each side with dusky black. Nearly at the center a much abbreviated black band. Beyond the center on the costal margin a subtriangular dusky black spot, the apex of which connects with the apex of a much larger subobsolete triangular...
Page 183 - ... 13th. These moths are not easily disturbed ; but will suffer the twig, upon which they are, to be handled freely without moving ; and often they will not take to flight even when touched. They usually rest upon the two posterior pairs of legs and the tip of the folded wings, with the front pair of legs drawn closely to the body, and the whole body forming an angle of about 45° with the object upon which they are at rest. In this position they will remain motionless for hours. Can it be that...
Page 121 - May 21, burrowing in the branches of the pignut hickory, Carya porcina, usually selecting the lower branches; imagoes about June 22. Chrysalis. Of the usual form, pale brown, rounded at the posterior end, at which place there is a cluster of about four slender hooked spines; length, from 7 to 8 mm. The larva spins a thin web around the footstalks of the leaves which grow near the terminal end of the branch, and then burrows into the terminal bud and the wood of the present year's growth. It webs...
Page 126 - ... part of first or basal line, this basal branch being also usually darker than the outer or posterior branch. The triangular costal patch from the basal line is obsolete. The transverse pale lines are less clearly defined and the terminal is nearer the posterior border of the wing, i.
Page 127 - S, mologist. ferous warts only about half the size of stigmata, very pale brown and polished, each supporting a fine hair of a faintly yellowish color, of which those on the posterior row of warts are much the longest and are directed forward. Similar long hairs are also on the head, thorax, around the margin of the anal plate and along the sides of the body. Legs concolorous with body.
Page 179 - In some specimens the basal transverse band is quite narrow, with the basal space a shade paler than the median: in others the band forms a double line. In some specimens, also, a narrow pale transverse line outside the second band, and a pale terminal shade. are visible. Hind wings uniformly...

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