. Annual report. 1st-12th, 1867-1878. Geology. PACKAra).J THE WHEAT-THRIPS THE WHEAT-WOEM. 713 Tliey were mostly at rest, reclining at full length on the ytraw, while only a few were feeding on the ; Larva.—The best marked worms are prettily striped witli sulpliur-yellow and straw- yellow, and with light and dark brown, as follows: A broad, dark-brown line along the "back, divided along the middle by a hue white line generally obsolete behind ; beneath this broad line on each side a straw-yellow line, half as wide ; then a light-brown one of the same width as the last, and becom
. Annual report. 1st-12th, 1867-1878. Geology. PACKAra).J THE WHEAT-THRIPS THE WHEAT-WOEM. 713 Tliey were mostly at rest, reclining at full length on the ytraw, while only a few were feeding on the ; Larva.—The best marked worms are prettily striped witli sulpliur-yellow and straw- yellow, and with light and dark brown, as follows: A broad, dark-brown line along the "back, divided along the middle by a hue white line generally obsolete behind ; beneath this broad line on each side a straw-yellow line, half as wide ; then a light-brown one of the same width as the last, and becoming yellow on the lower edge ; then a narrower dark-brown one, containing the white spiracles ; then a sulphur-yellow as wide as the third ; then a less distinct light-brown subventral one, the venter being pale yellow. The head is large, straw-colored, and with two attenuating brown marks from the top to the lower face. The chrysalis is of the ordinary mahogany-brown color, and termi- nates in a stout horny point, with a corrugated base. Adult.—The moth has the front wings straw-colored, with a pale line running along the middle to the outer third, and shaded with brown as follows : A shade beneath the white line,.intensified at each end where it joins the white; another, along the poste- rior border, narrow at apex and broadening to the middle, where it projects along the middle of the wing above the white line, fading away toward base, and a fainter shade along the front or costal edge, intensifying toward apes. The species is one of th(^ smallest of the genus, having but two-thirds of the size of the army-worm.—(Riley.) The Wiieat-Thrips, iimo</ir(j)S iritici Yitch.—"Upon the heads and stalks in June and July, exhausting the juices of the kernels and rendering them dwarfish and shriv- eled ; exceedingly minute, active, long, and narrow six-legged insects, of a bright-yel- low or of a shining-black ;—(Fitch.) Tbe wheat-thrips in this country also
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