Homl — Three Xeir Phi o< ithripidse. (Thysanoptera) . 15 



as that of facets of eyes; posterior ones widely separated, nearly contigu- 

 ous to margins of eyes; anterior ocellus situated on vertex and directed 

 forward and upward. Antennae slightly less than twice as long as head, 

 not inserted beneath vertex ; segments 3 •") clavaform, elongate, 3 nearly 



live times as long as greatest subapical width; (land 7 oblong, pedicellate; 

 8 subcorneal; sense cones short, acute. Mouth cone broadly rounded at 

 apex and reaching beyond middle of presternum. 



Prothorax about .6 as long as head and (including coxae) almost twice 

 as wide as long, surface nearly smooth; anterior angles produced into a 

 strong, short, tooth-like projection about .17 mm. in length; posterior 

 angles with three distinct sclerites; usual spines all present, the two pairs 

 at the posterior angles much the longest, about as long as the postoculars. 

 the others about as long as those on cheeks; fore coxse armed with a 

 single rather short spine. Pterothorax slightly narrower than prothorax, 

 sides subparallel. Wings reduced, .7 as long as head, slightly less than 

 live times as long as wide. Legs very long; spines short, slender, incon- 

 spicuous; fore femora very large, longer than and .7 as wide as head, 

 and about three times as long as wide ; fore tarsi armed with a long, 

 slender, straight tooth nearly as long as eye. 



Abdomen slender, slightly narrower than prothorax; sides subparallel 

 to sixth segment, thence tapering to base of tube; tube slightly shorter 

 than head, expanded in basal sixth and narrowed at apex, intermediate 

 portion parallel-sided ; terminal bristles weak, two-fifths as long as tube. 

 Abdominal bristles pointed, long and strong, those on segment 9 nearly as 

 long as tube. 



Measurements. — Length, 2.27 mm.; head: length, .40 mm. ; width, 

 .24 mm. ; prothorax : length, .25 mm. ; width (including cox;e), .47 mm.; 

 pterothorax: width, .42 mm. ; abdomen: width, .45 mm.; tube: length, 

 .37 mm. ; width at base, .102 nun.; at apex, .048 mm. Antennae: seg- 

 ment 1, 69m; 2, 72m; 3, 174m; 4, 129m; 5, 108m; 0, 78m; 7, 72m; 8, 42m; 

 total, .74 mm.; width, .036mm. 



Described from one short-winged male taken on huisache (Acacia far- 

 nesiana YVilld. ), in the South Texas Garden, Brownsville, Texas, June 

 27. L908, by Air. Charles A. Hart. 



