|scientific name Chirothrips crenulatus |
Short grass prairie, Artemesia cana, various other grasses, (Chiasson, 1986).
Adults collected in July and August.
The body varies around 1.6mm in length, and is brown. The apex of antennal segment 2 is yellow, and the forewings are grayish brown, except for a pale gray subbasal band. The head is prolonged in front of the eyes and the vertex of the head has 4 to 6 pairs of stout setae. Antennal segment 1 is enlarged, segment 2 is greatly produced at the apex, and segments 3 and 4 have simple sense cones. Antennal segment 6 is much shorter than the length of segments 4 and 5 combined. The pronotum is moderately setose. The mesonotum is scalloped anteriorly and along the extreme posterior margin. Mesosternum and metasternum have many stout setae. Males are apterous. Abdominal tergites have one to several lines of minute scallops subbasally. Abdominal sternites, except terminal ones, have large scallop-like markings (Stannard, 1968).
Alberta (Chiasson, 1986) Nebraska, Kansas, Colorado (Stannard, 1968).
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