Dactuliothrips spinosus Moulton, 1931: 173

Body dark brown; antennae dark with antennal segment III pale (Fig. 17); fore wings uniformly colored. Head almost as long as wide, with two pairs of long postocular setae (Fig. 27). Pronotum (Fig. 35) and mesonotum with microtrichia. Metanotum with arcuate sculpture, with one pair of anterior setae (Fig. 42), and microtrichia on median anterior area. Fore femur with 2–5 spurs on inner margin (Fig. 70). Abdominal sternites with 5–6 medial discal setae and very few microtrichia; sternite VII with three pairs of posteromarginal setae and two pairs of similarly-sized supernumerary setae aligned with the posteromarginal setae. Male abdominal tergite I with paired longitudinal ridges that do not reach the anterior margin.

Material examined. USA, California, Lee Vining, 2 females, 1 male, on Purshia tridentata, 19.vi.1963, 1.vi.1964 (P. Allan); Cajon Pass, Big Pines camp, 1 female, on Ceanothus flowers, 12.iv.1936 (R. Bohart); Los Angeles Co., La Crescenta, 1 male, on Ceanothus crassifolius Torrey, 8.ii.1967 (H. Evers).