June, 1916 Bulletin of the Brooklyn Entomological Society 65 



produced posteriorly on ventral surface of head, widely separated, about 

 half as wide as their dorsal interval. Ocelli wanting. Antennae about 1.4 

 times as long as head, formed almost exactly as in Cryptothrips gilvipes 

 Hood ;* sense cones short. 



Prothorax about half as long as head and (inclusive of coxse) about 

 1.6 times as wide as long, declivous posteriorly; usual bristles all present, 

 similar to postoculars. Pterothorax greatly reduced, about as long as 

 broad and about equal in width to head ; mesonotum nearly smooth, meta- 

 notum with heavy concentric anastomozing striae. Legs about concolorous 

 with head and thorax. Fore tarsus with a short, stout, triangular tooth. 



Abdomen stout, heavy, about twice as wide as pterothorax ; tube yellow, 

 less than half as long as head, distinctly constricted at apex, which is 

 black ; all abdominal bristles colorless, mostly knobbed. 



Measurements of holotype (approximate only) : Length 2.58 mm. ; head, 

 length 0.49 mm., width 0.32 mm.; prothorax, length 0.25 mm., width (in- 

 clusive of coxae) 0.43 mm. ; pterothorax, width 0.30 mm. ; abdomen, width 

 0.56 mm. ; tube, length 0.22 mm., width at base 0.093 mm., at apex 0.052 mm. 



Antennal segments i 2 



Length (/^) 75 81 



Width (^) 54 39 



Total length of antenna, 0.71 mm. 



Described from.one female taken on Bermuda grass at Dallas, 

 Texas, July 21, 1908, by Dr. W. A. Hooker. The species is 

 named in his honor in recognition of his interest and economic 

 work in this order of insects. 



This is one of the most aberrant American thrips, possessing 

 unique characters of structure and coloration. In some ways it 

 suggests Compsothrips albosignatus Renter, which occurs in the 

 Mediterranean, province of the Palearctic region. 



Explanation of Plate 8. 



Fig. I. CEdaleothrips hookeri gen. et sp. nov., right fore tarsus, lower 

 surface. 



Fig. 2. CEdaleothrips hookeri, tube, dorsal surface. 



Fig. 3. OBdaleothrips hookeri, right antenna, inner dorso-lateral surface. 



* Proc. Biol. Soc. Wash., Vol. XXVII, 1914, PI. V, Fig. 4. 



