NEW CALIFORNIA AND GEORGIA THYSANOPTERA. 7 



one and one-half times as wide as prothorax, mesotJiorax sliglitly 

 wider than metathorax. Legs everywhere transparent white, except 

 dark spot near apex of each tarsus. Wings present, reaching to tip 

 of abdomen, transparent white, similar to rest of body. About 

 twenty-four to twenty-six spmes upon the costa; about twenty-two 

 on fore vein; one near base and one near apex of wing where hind 

 veins should be. No fringe on anterior margin. 



Abdomen cylindrical, tapering sharply from segment 8, thickly 

 clothed with minute white hairs which appear as a fringe upon the 

 posterior margins of the segments. Spines upon segments 1 to 8 

 weak and inconspicuous ; a row of long white spines upon the dorsum 

 of segment 9 near posterior margin, and a similar row on segment 10 

 near middle of dorsum. 



Described from three females taken in May, 1910, at Visalia, Cal., 

 from blossoms of elderberry (Samhucus sp.) and from weeds (P. R. 

 Jones) . 



Structurally, this species is very close to S. variabilis Beach. It 

 differs, however, in several details and shows such a constant differ- 

 ence in coloration that I believe it to be a good species. 



Sericothrips moultoni new species, female. (PI. II, figs. 6-9.) 



Measurements: Head, length 0.1 mm., width 0.2 mm.; prothorax, 

 length 0.166 mm., width 0.266 mm.; mesothorax, width 0.333 mm.; 

 abdomen, length 0.90 mm., width 0.366 mm. Antennae: Segment 1, 

 18 fi; 2, 45 /(; 3, 70 /t; 4, 60 //; 5, 48 /x; 6, 54 fi; 7, 15 //; 8, 18 /x; total 

 length of antennae 0.32 mm. Total length of body 1.35 mm. 



Color dark brownish black. Similar to S. variabilis Beach, but 

 differing from it as follows: 



Head one-half as long as wide, uniformly brownish black. Seg- 

 ments 1, 2, and 3 of the antennae very light yellowish brown; segments 

 4 and 5 apically, segments 6, 7, and 8 entirely, grayish browTi; a pair 

 of small spines near the inner and outer posterior margins of each 

 eye. 



Prothorax not concolorous with head, light yellowish brown, less 

 than one-half as long as wide. Pteroihorax brownish black, meso- 

 thorax slightly wider than metathorax. Posterior femora uniformly 

 dark brown, except an area at the base. Fore wings transparent 

 white, except a small grayish-brown area at base, and one cross-band 

 of similar color about one-third the distance of the wing from the 

 base. About twenty-six spines on costa; about twenty-two spines on 

 fore vein; usually no spmes where hind vein should be, but sometimes 

 one spine present near apex of wing. 



Abdomen: Segments 1, 2, 7, 8, 9, and 10 brownish black; inter- 

 mediate segments light yellowish-brown with the anterior margins 

 brownish black, varying in extent. Segments clothed with numerous 

 fine hairs, appearing as a fringe on the posterior margins. Segment 



