|scientific name Thrips sieversiae |
Aguilegia sp., Brassica sp., grass, Salix sp. (Nakahara 1994).
Body varies in length around 1.4 to 1.57mm and is dark brown. Both ends of all tibiae, and the apices of the fore femora are yellow. The forewings are light brown, but paler in the basal quarter. Antennae are brown with segment 3 yellow, segment 4 yellowish basally, and segment 5 may be somewhat paler on the basal portion of the segment. The head is broader than long and the cheeks are strongly arched. Ocellar setae pair 3 is on the border or outside of the ocellar triangle, posterolaterad to the anterior ocellus. Antennae are 7 segmented, with a short v-shaped trichome on segment 4. The pronotum is transversely striate and has 6 to 8 posteromarginal setae. The inner pair of posteroangular setae are longer than the outer. The metanotum is reticulate medially and the forevein on each forewing has 3 distal setae. There are 3 lateral setae on tergite 2, and on tergite 8 there is a broadly interrupted, posteromarginal comb. There are 2 pairs of campaniform sensilla present on tergite 9. On males, sternites 3 to 7 each have an elongate or transverse oval shaped glandular area (Nakahara 1994).
Feeds on pollen (Chiasson 1986).
Alberta, Manitoba, N.W.T., Saskatchewan, Yukon, Colorado, Montana, North Dakota, Arkansas (Nakahara 1994).
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