. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 8 THE TOBACCO THRTPS. Tex., in both winged and wing-less forms, on Johnson grass {Sorghum halepense) in March. It would seem, therefore, to be a general feeder and widely distributed through the Southern States. DESCRIPTION. Adult.—Doctor Hinds describes the adult as follows: EiTTHRU's ; sj). nov. Average length. ) mm. ( to mm.) ; average breadth at middle of abdomen, mm. ( to mm.). General color of head and thoniv light brown or tawny yellow-brown; abdomen dark brown. Hea
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 8 THE TOBACCO THRTPS. Tex., in both winged and wing-less forms, on Johnson grass {Sorghum halepense) in March. It would seem, therefore, to be a general feeder and widely distributed through the Southern States. DESCRIPTION. Adult.—Doctor Hinds describes the adult as follows: EiTTHRU's ; sj). nov. Average length. ) mm. ( to mm.) ; average breadth at middle of abdomen, mm. ( to mm.). General color of head and thoniv light brown or tawny yellow-brown; abdomen dark brown. Head about one and one-half times as wide as long, frequently slightly retracted under ante- rior margin of protho- lax: occiput trans- versely wrinkled, pos- terior margin strongly thickened and darker in color ; anterior mar- gin slightly bisinuate, cheeks approximately straight and parallel. Eyes dark red in col- or, not protruding, oc- cupying together fully one-half the width of the front of the head and being one half a^' long as the head; mar- gins around eyes pal« yellow in color; sur- face of eyes finely fac- eted and slightly pi- ; three ocelli present, well separated, posterior ones contiguous with yellow borders to eyes, pale yellow in color and margined inwardly with pale-orange crescents; one moderately stout dark si)ine in front of each posterior ocellus; postocular spines weak and inconspicuous. iNIouth cone reaching nearly to pos- terior edge of the prosternum, tapering abruptly; maxillary palpi slender, three- segmented. Antenme inserted slightly below fnmt margin, approximate at base, about two and one-half times as long as the head .and approximately equal to breadth of mesothorax; relative length of segments: ". Fig. 1.—The tobacco thrips {EiUhrips nicotianx): Adult insect. Much enlarged (author's illustration). i;!.5 13.(5 Segment 1 is rounded, three-fourths as long as broad; 2 is as broad as 1 ; following segments ab
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