Hood — Nim Neu Thysdnoptera from the United states. 165 



times as long as w ide ; checks subparallel, slightly converging posteriorly, 

 with several prominent spiniferous tubercles, of which one at anterior 

 third is usually more conspicuous; two irregular carina? between eyes; 

 eyes about one-third as long as head, narrower than their interval; 

 ocelli wanting; postocnlar bristles two-thirds as long as eyes, capitate. 

 Antennae about twice as long as head ; segment 2 bent prominently out- 

 ward at base of pedicel: segments 1 and 2 nearly black; 3 orange yellow ; 

 4-8 blackish brown, the apical segments darkest, 4 yellow at base. Pro- 

 thorax nearly as long as head, and (inclusive of coxse) about 1.7 times as 

 wide as long, without median chitinous thickening; all bristles present, 

 short, capitate. Legs nearly black, short; tarsi brown. Wings short, 

 scale-like. Abdomen broad and heavy, nearly one and one-half times as 

 wide as prothorax; tube about equal in length to head, slightly more 

 than twice as wide at base as at apex. 



Measurements of holotype. — Length 1.8 mm.; head, length .201mm., 

 width .180 mm.; prothorax, length .192 mm., width (inclusive of 

 cox*) .342 mm.; pterothorax, width .360 mm.; abdomen, width .504 

 mm.; tube, length .192 mm., width at base .078 mm., at apex .035 

 mm. Antennal segments: 1, 42m; 2, 60m; 3, 45m; 4, 51/*; 5, 48m; 6, 52m; 

 7, 54m; 8, 43m; total length of antenna, .39 mm.; width at segment 4, 

 .035 mm. 



Described from 101 females taken at the base of young willow shoots, 

 Plummer's Island, Maryland, May 9, 18, and June 8, by W. L. McAtee, 

 Alex. Wetmore, and the writer. 



Phloeothrips ornatus sp. nov. 



Female, forma macroptera. — Color mahogany brown, with a white 

 vitta (broader posteriorly) each side of prothorax and with dorsum of 

 abdominal segments 1-8 marked each with a lateral white blotch; base 

 of prothorax, all of first abdominal segment, and intervals between dorsal 

 and lateral pterothoracic plates often marked with white. Head 1.2 times 

 as long as wide; cheeks nearly straight, slightly converging to base, fine'y 

 striate, each with about live small spiniferous tubercles; eyes more than 

 one-third as long as head, wider than their interval; postocular bristles 

 minute, seemingly indistinguishable from the sparsely placed cephalic 

 one-. Antennas rather stout, 1.4 timer- as long as head ; segments 1 and 

 '_' nearly black; segments 3-8 blackish brown, pale at base. Prothorax 

 a little more than half as long as head and only slightly broader than 

 head; all bristles present, short, dilated at tip. Legs nearly black, with 

 tarsi ami ends of tibiae pale grayish yellow. Wings of both pairs slender, 

 not narrowed at middle; fore pair clear in basal third and at tip, inter- 

 mediate portion clouded with gray, darkest along middle ; posterior fringe 

 double for 10 or 12 hairs. Tube about .6 as long as head and .li as wide 

 at apex as at base, sides straight; abdominal bristles mostly short and 

 capitate. 



Measurements of holotype. — Length 1.75 mm.; head, length .270 mm., 

 width*. 228 mm.; prothorax, length .150 mm., width (inclusive of 



