Dinurothrips guamensis, Moulton, 1942

Moulton, Dudley, 1942, Thysanoptera: Thrips of Guam, Insects of Guam I, Bernice P. Bishop Museum Bulletin, pp. 7-16 : 7-8

3. Dinurothrips guamensis , new species.

Female holotype: color golden brown darkened with black at sides of head and thorax; antenna! segments 1 and 3 to 5 clear yellow, 2 dark golden brown, 6 to 8 brown with

extreme base of 6 yellowish. Fore legs, hind tibiae and all tarsi light golden yellow, with sides of femora and tibiae more or less shaded with blackish brown; middle femora and tibiae dark brown, yellowish at tips. \Vings, especially the prominent veins, brown at base and with brown bands in third and fifth sixths, area between veins mostly clear; spines dark brown except distal one on fore vein, which is clear.

Head clearly wider than long, constricted abruptly behind eyes; cheeks arched and narrowed rather evenly toward base; clearly though indistinctly reticulate near posterior margin. Eyes prominent, protruding, especially in front for about one third their length; ocelli approximate, anterior ocellus directed forward. Antenna! segment 2 widest, 3 and 4 more or less spindle shaped, 5 roundly conical, 6 and 7 closely joined, 8 long and slender; simple sense cones on 3 and 4.

Pronotum explanate at sides, reticulate; pterothorax broadly rounded at sides and narrowed posteriorly; mesonotum irregularly reticulate cross striate, with a distinct longitudinal suture; metanotum with a median triangular area which is striate longitudinally. Forewings strong, veins fused with marginal veins; with eleven spines on outer anterior margin of fused vein and with one near base and two near tip on inner side; with five irregularly placed spines on fused posterior vein. Each hind wing with a distinct median line extending to tip of wing. Abdominal segments reticulated at sides, clear in middle except for two or three transverse lines near anterior margins of segments 3 to 8. Spines at tip of abdomen short and stout, otherwise there are no conspicuous spines on abdomen., Total body length 1.12 mm.; head length 0.11 mm., width at eyes 0.166 mm., across cheeks 0.160 mm.; prothorax, length 0.102 mm., width including explanate extensions 0.193 mm. Length of spines on ninth abdominal segment 40 microns, at tip of tenth segment 26 microns, which is approximately one fourth the length of the segment. Antenna! segments, length (width): I, 33 (26); II, 33 (26); III, 40 (18); IV, 40 (20); V, 36 (22); VI, 30 (20); VII, 10 (10); VIII, 26 (5); total 216 microns.

Agana, June 26, on Cestrum pallidum , female holotype and eight female paratypes, 0. H. Swezey ( 5464 ) .

D. guamensis may be separated from D. frontalis Bagnall by its brown middle legs, brown hind femora, also by the absence of black rings or "eye spots" on tergites three to seven. In D. frontalis , the legs are yellow with femora slightly deeper in coloration especially the intermediate pair.