128 Journal New York Entomological Society. [Voi. xxiii. 



longer but not so broad ; 3 slightly longer and narrower than 2 ; 4 the longest, 

 broader than either 3 or 5 ; 5 slightly longer than 6, which is about as long 

 as segment 3; 8 conical, distinctly more than half as long as 7; color: i 

 almost black; 2 slightly lighter toward apex; 3 much lighter, especially toward 

 base ; remaining segments successively darker to 8, which is almost as dark as 

 I. Mouth cone blunt, much shorter than width of head, reaching about to 

 middle of prosternum ; labrum about attaining tip of labium. 



Prothorax longer than width of head and (inclusive of coxae) nearly 1.8 

 times as wide as long ; surface smooth ; anterior marginal bristles wanting 

 or minute, others present, conically expanded at tip, posterior laterals longest, 

 about as long as postoculars. Pterothorax slightly narrower than prothorax, 

 sides converging posteriorly. Legs of moderate length, fore femora moder- 

 ately stout, fore tarsus with strong, curved tooth, from the base of which arises 

 two spines about equal in length to tooth ; color dark brown, with tarsi, apex 

 of mid and hind tibise and the fore tibiae, especially at each end, lighter. 

 Wings almost colorless, slightly narrower about two-fifths from base, where 

 there is a slight folding of the surface ; 1-5 (usually 3) accessory hairs. 



Abdomen normal ; spines rather short and pale, arranged in Z. bicolor 

 (Plate VIII, fig. 7), but with the dorsal pair at apex of segment 9 short and 

 capitate, and the terminal bristles fully twice as long as tube. Tube .6 as 

 long as head, about twice as long as basal width, not quite twice as broad at 

 base as at apex. 



Measurements of holotype : Length 1.55 mm.; head, length 0.205 mm.; 

 width 0.156 mm.; prothorax, length 0.180 mm., width (inclusive of coxae) 0.322 

 mm.; pterothorax, width 0.312 mm.; abdomen, width 0.336 mm.; tube, length 

 0.123 mm., width at base 0.064 mm., at apex 0.036 mm. 



Antennae : 12345678 



Length (/j.) 24 42 44 54 47 45 48 29 



Width (/u) 36 30 28 30 26 22 19 12 



Total length, 0.333 mm. 



Described from 32 females collected from bamboo, sago palm, 

 and live oak covered with Spanish moss, at New Orleans, Louisiana, 

 December i and 2, 1914, by C. B. Williams. 



Distinguished by the long prothorax, the peculiar tarsal tooth, the 

 long bristles at the apex of the tube, and the nearly uniform dark 

 color. 



Trichothrips marginalis new species. (Plate IX., fig. i.) 



Female (brachypterous). — Length about 1.8 mm. Color yellowish brown, 

 with head, prothorax, and terminal abdominal segments darkened with black- 

 ish brown ; segment i of antennae concolorous with head, 2 lighter toward 

 apex, 3 light yellowish brown, 4 shading to darker at tip, 5 dark in outer 



