NEW CALIFORNIA AND GEORGIA THYSANOPTEBA. 5 



» 



middle; rest of posterior margin set with small spines and whole 

 dorsum of prothorax with numerous slightly longer spines. Meso- 

 thorax largest, sides of pterofhorax broadly rounded. Legs stout, fore 

 femora and tibiaj greatly enlarged, remaining femora and tibise some- 

 what enlarged. Color of legs brown, fore tibia?, tips of middle tibiae, 

 and fore and middle tarsi light yellowdsh brown. All tibiae armed 

 with spines. Wings present, fore wings large, uniform gray-brown, 

 with spines arranged as follows: Costa vnth twenty-four; fore longi- 

 tudinal vein with eight spines at base in groups of five, two, and one, 

 with three scattered spines on apical half of wings; hind vein with 

 six spines, the apical one separated from the rest. Abdomen stout, 

 elongate-oval; segments 4, 5, and 6 largest; posterior margin of seg- 

 ments 1 to 7 with distinct sharj) serrations, more distinct on apical 

 segments; segment 8 with longer and sharper teeth. Almost no 

 spines on abdomen except on last two anal segments. Segment 10 

 split above. 



Described from two female specimens taken on goldenrod (Soli- 

 dago sp.) at Barnesville, Ga., Aug. 22, 1910. (E. L. Jenne.) 



11. Genus SERICOTHRIPS Haliday. 

 Key to the Species. 



1. Wings fully developed or rudimentary. 



a. Wings fully developed. 



b. Fore Avings white, no dark cross-bands or shading; general color white. 



Sericothrips albtis new species. 

 y. Fore winga dusky or gray-brown and more or less distinctly marked with 

 whitish cross-bands; general color yellowish dusky-gray. 



Sericothrips variabilis Beach. 



6''. Fore wings white, with gray cross-bands; head black; prothorax light 



yellow-brown; pterothorax black; tip of abdomen black; general 



color blackish Sericothrips moultoni new species. 



V. Fore wings black, with two broad white cross-bands and white at tip; 

 head black; prothorax black; pterothorax somewhat lighter; general 



color blackish Sericothrips pulchellus Hood. 



a'. Wings reduced or fully developed; body dark brown to nearly black, except 

 segments 4, 5, and 6 of abdomen, which are almost white. 



Sericothrips cingulalus Hinds. 



2. Wings wanting. 



a. Body very dark brown, nearly black; pterothorax yellow to yellow-brown; 



legs brown Sericothrips apteris Daniel. 



a\ Body uniform brown; surface of body strongly reticulated; legs yellow. 



Sericothrips reticulatus Moulton. 

 a^\ Body and legs uniform brown; four stout spines on the dorsal side of segment 9. 



Sericothrips stanfordii Moulton. 



