|scientific name Thrips trehernei |
Polyphagous, often on dandelions (Nakahara 1994).
Body varies around 1.27mm in length and is dark brown. The fore tibiae are yellow with light brown sides, and the forewings are also brown. The antennae are brown, though segment 3, and the basal portions of segments 4 to 6 are yellow. The head is broader than long, and ocellar setae pair 3 is outside or on the border of the ocellar triangle, and posterolaterad to the anterior ocellus. The antennae are 7 segmented, and on segment 6, the base of the inner sense cone is oval. There are weak striations on the posterior half of the pronotum, and 3 or occasionally 4 pairs of posteromarginal setae. There is 1 pair of anteromedial campaniform sensilla present on the mesonotum. The metanotum is longitudinally striate and sensilla are absent. The forevein on each forewing has 3 distal setae. Abdominal tergite 2 has 4 (occasionally 3) lateral setae, and the posterior margins of tergite 6 and 7 may have some scallop-shaped striations. Tergite 8 has a complete posteromarginal comb, tergite 9 has 2 pairs of campaniform sensilla, and sternites 2 to 7 have accessory setae. Sternite 1 has 3 anteromedial setae. On sternites 3 to 7 on males the glandular areas are transversely oblong (Nakahara 1994).
Alberta, Nova Scotia, Quebec, Manitoba, Ontario, Saskatchewan, B.C., Yukon (Chiasson 1986) U.S., Europe (Nakahara 1994).
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