Hinds A New Tobacco Thrips. * 199 



equal to about one-thirteenth of their length ; fore wing has two longitu 

 dinal veins, each bearing stout spines set at regular intervals; fore wings 

 shaded ash-gray, hind wings gray only along basal three-fourths of mid- 

 vein ; spines on wing veins dark brown and conspicuous ; costa bears 19 

 to 24 spines ; fore vein, 13 to 18 ; hind vein, 10 to 12 ; scale, 5 ; interior of 

 scale, 1 ; fringe of hairs on costa of fore wing quite heavy, in length exceed, 

 ing the breadth of the wing. Legs of medium length, lighter than body in 

 color, pale yellow, shaded more or less with brown on upper side at middle 

 of femora and tibiae ; a pair of stout brown spines at inside of tip of each 

 tibia, small brown spines scattered along femora and tibiae; spines stand 

 ing in two rows on inner side of hind tibiae are weak and only about four 

 in each row. 



Abdomen nearly cylindrical to eighth segment, then tapering abruptly 

 to an acute tip ; color uniformly dark brown ; a still darker-colored narrow 

 chitinous thickening extends across dorsal side of segments 2 to 8 near 

 anterior edge. Three or four quite stout and rather conspicuous dark 

 brown spines stand at each side of dorsal plates on 2 to 8 ; six rather prom 

 inent spines stand in a row on posterior edge of ventral plates 2 to 7 ; ter 

 minal spines stout and prominent ; tenth segment split open along dorsal 

 median line. 



Described from 10 females. 



Male specimens of this species have not been found. 



Three cotypes (three slides) deposited in the U. S. National Museum. 

 Type No. 8434, U. S. N. M. Three cotypes (three slides) deposited at the 

 Massachusetts Agricultural College. Four cotypes (two slides) retained. 



Habitat. Quincy, Fla. 



Food plants. Tobacco, oats, shepherd's purse, Brassica sp. 



