NEW CALIFORNIA AND GEORGIA THYSANOPTERA. 9 



process at the outer angle; 3 and 4 fusiform ; 5 clavate ; 6 fusiform ; 7 and 

 8 slender, cylindrical. A forked sense cone on outer side of segment 

 3, a similar one on inner side of segment 4, and similar ones on ventral 

 side of segments 5 and 6; all other sense cones simple, short, slender, 

 and inconspicuous. 



ProtTiorax a little shorter than the head, one and one-third times 

 wider than long, diverging from the head posteriorly; one prominent 

 spine on each posterior angle, the other spines short and inconspicuous; 

 sides slightly rounded. MesotJiorax nearly twice as wide as the pro- 

 thorax; metathorax abruptly narrower. Legs uniform brown, except 

 fore tibiae, ends of tibiae, and tarsi, which are brownish yellow ; legs 

 moderately long, hind tibiae alone bearing a fringe of stout spines. 

 Wings present, long and slender, about fifteen times as long as tJie width 

 in the middle. Two longitudinal veins in fore "vWng, branching at 

 about one-fourth its length. Both veins and cost a bearing a few 

 short dark brown spines ; costa with about twenty-five to twenty-eight; 

 fore veins with about ten, only three beyond the middle; hind vein with 

 eight more or less regularly placed spines. Fore wings dark smoky 

 gray; hind wings slightly gray; costal fringes long and prominent. 



Abdomen about two-thirds length of body, about as wide as long. 

 Spines on abdomen weak and inconspicuous before segment 7; 

 segment 8 bearing on each side three or four stout, curved, dark- 

 brown spines; segment 9 bearing a circlet of long slender spines and 

 two very stout spines, one on each later o-posterior edge on the dorsum 

 just in advance of the circlet of spines. Segment 10 split open above, 

 sharply pointed, and on each side above with a short, very stout, 

 straight, dark-brown spine, reaching slightly beyond the tip. Abdo- 

 men yellowish brown, darker toward tip, connective tissue pale 

 yellow. 



Described from numerous long-winged females taken on green fox- 

 tail grass (Setaria viridis), wild oats, and California buckeye 

 (J^sculus calif ornica) , San Jose, Cal., June-Juh^, 1910 (P. R. Jones). 



Near Limothrips avense Hinds ( = cerealium HaHday, according 

 to Bagnall) but differing in the italicized characters. 



Male: Head, length 0.116 mm., width 0.2 mm.; antennae, length 

 0.258 mm. ; prothorax, length 0.166 mm. ; prothorax, width 0.25 mm. ; 

 mesothorax, width 0.175 mm.; abdomen, width 0.341 mm.; total 

 length 1 .366 mm. 



Color brownish yellow, head grayish bro^vn. Head one and one- 

 half times as wide as long, ocelli wanting, only vestiges remaining in 

 some specimens. Mouth-cone longer than in female, extending nearly 

 to posterior margin of the prosternum. Antennse stout, a Uttle more 

 than twice as long as the head, process on second joint not so acute 

 as in the female. Prothorax a little longer than the head, one and 

 one-tliird times as broad as long. No vestiges of wings. Abdomen 

 about two and one-half times as long as broad, bluntly rounded; 



