Hood — Studies in Tidodiferous Thi/saiioptera. 
156 
their diameter fully one-third the width of eyes. .Vntenme eight- 
segnu'iited, about -.2 times as long as lu'ad ; segments I and 2 subequal 
in length, distinctly shorter than H, which is the longest in entire antenna 
and claviform ; 4-S sul)equal in length, stout, jiedicellate ; bristles and 
sense cones unusually long, ('olor of antenine: S('ginents I and 2 black¬ 
ish brown, 2 paler apically and at middle; o yellow, infuscate at apex; 
4-S nearly black, distinctly darker tban I and 2. Moutb cone half as 
long as width of head, broadly rounded at apex, reaebing two-thirds 
across |)rosternnm. 
I'rothorax about .7 as long as lu*ad ami (iiu’lusive of coxa?) twice as 
wide as long; notuiu with the midlateral, posterior angular, and posterior 
marginal bristles unusually long and prominent, pointed ; anterior angu- 
lars and anterior marginals reduced in size and barely visible; coxal 
bristles about one-third as long as postoculars. 1’terothorax slightly 
wider than prothorax, darkest in color at sides ot metathorax. Wings 
slender, narrowed apically, darkened with brown at base and in apical 
third, intervening portion nearly wdiite; fore wings without double sub- 
apical fringe on posterior margin. Legs uniform yellow^ except for the 
brown ends of tarsi; fore femora shorter than head and slightly more 
than twice as long as wdde; fore tarsi unarmed. 
Abdomen moderately broad, about 1.25 times as wdde as prothorax. 
Tul)e about .8 as long as head and twdee as long as basal width, which is 
2.0 times the apical ; sides nearly straight. Abdominal bristles long, 
pointed; terminal bristles and those on .segment 9 equal in length to tube. 
5feasurements of bolotype; Length 1.4(5 mm.; head, length .204 mm., 
width .197 mm.; prothorax, length .144 mm., wddth (inclusive of coxfe) 
.288 mm.; pterothorax, wddth .30(5 mm.; abdomen, wddth .360 mm.; 
tube, length .168 mm., wddth at base .089 mm., at apex .0.36 mm. An¬ 
tennal segments: 1,o7m; 2, 57/x; 3, length 70^^, wddth 37/x; 4, 53/^; 5, 
.53m; 6, 53m; 7, 51m; 8, 5(5m; total length of antenna .45 mm. 
Described from one female taken by sweeping at Corozal, Canal Zone, 
Panama, October 19, 1911, by Mr. .lames Zetek. 
The cbfetotaxy, coloration, and unarmed fore tarsi indicate a very dis¬ 
tinct species. 
Trichothrips ambitus blinds. 
1902 Trichothrips ambitus Hinds, Proc. U. 8. Nat. Mus., \ol. XXVI, 
p. 191, PL VIIJ, figs. 81, 82. 
This species has not been mentioned in the literature since its original 
description in 1902 from one female taken at Amherst, Massachusetts. 
Tw’O males are in the collection before me, one taken in miscellaneous 
collecting at Carbondale, Illinois, May 19, 1908, by Mr. Charles A_. Hart; 
the other found on a branch of a wdllow tree at Bluemont, \ irgima, 
August 31 1913, by the writer. They do not differ sufficiently from 
T>octov Hinds’ characterization of the opposite sex to require a separate 
description at present. 
