Hood — Descriptions of New Thysanoptera. 123 



little more than twice as wide as long ; all usual bristles present, the two 

 pairs at the posterior angles longest, subeqnal in length to postoculars ; 

 coxal bristle somewhat shorter, midlaterals still shorter, anterior mar- 

 ginal and anterior lateral pairs only about half as long. Pterothorax 

 slightly wider than prothorax, narrower posteriorly. Wings of equal 

 width throughout, light gray-brown in color, slightly paler at either end ; 

 posterior fringe double for four or five hairs ; the three subbasal spines 

 on fore wing of equal length, pointed. Fore tarsus unarmed. 



Abdomen of normal form and structure, wider than pterothorax. Tube 

 0.8 the length of head, slender, twice as wide at base as at apex, sides 

 straight. Bristles yellow, moderately long and pointed, those on seg- 

 ment 9 slightly more than half as long as tube; terminal bristles about 

 three-fourths the length of tube. 



Measurements of holotype: Length 2.04 mm. ; head, length 0.288 mm., 

 width 0.246 mm.; prothorax, length 0.180 mm., width (inclusive of 

 coxae) 0.390 mm.; pterothorax, width 0.4,38 mm.; abdomen, width 

 0.498 mm.; tube, length 0.228 mm., width at base 0.087 mm., at apex 

 0.042 mm. 



Antennal segments: 1 



Length (m) 63 7 



AVidth (m) 46 3 



Total length of antenna, 0.543 mm. 



Described from one female taken at Annapolis, Maryland, May 8, 

 1915, by 0. D. Knight and the writer. It flew aboard a naval launch 

 well out in the River Severn. 



The antennal coloration and the pedicellate eighth antennal segment, 

 together with the unarmed fore tarsi and the long tube, distinguish this 

 species quite readily. 



