116 Proceedings of the Biological Society of Washington. 



the former by the color of the legs and from the latter by the longer pro- 

 thorax and the long, strong bristles of the prothorax and fore wings The 

 figure of annulipes cited above would serve almost equally well for the 

 present species. 



Physothrips pictus sp. nov. 



Female (macropterous). — Length about ].6 mm. Color bright yellow, 

 with brown markings on pterothorax and antennae, with fore wings 

 brown in second and fourth fourths, and with abdominal tergites 2-4 

 and 6-7 fasciate with brown, 8 with a transverse brown blotch, and 

 9-10 dark brown beyond basal sixth of 9. 



Head about 1.3 times as wide as long, slightly broadest behind eyes, 

 sides evenly arcuate to eyes and to base; occiput with five transverse 

 raised lines, only slightly anastomozing, the anterior one strongest, the 

 remainder of head smooth; frontal costa narrow, with a very shallow 

 notch; interocellar bristles prominent, brown, equal in length to eyes, 

 situated well within the ©cellar triangle, their bases being directly behind 

 the lateral margins of anterior ocellus; all other cephalic bristles minute. 

 Eyes 0.6 as long as head, and slightly narrower than their interval. 

 Ocelli nearly equidistant, subequal in size, posterior pair about opposite 

 posterior half of eyes; pigment bright red. Antennae fully 2.5 times the 

 length of head, of normal form and structure, segment 3 slightly longer 

 than 4, the sense cones on 3 and 4 forked ; segments 1-3 yellow, 1 and 2 

 darkened laterally with brown ; 4 yellow in basal two-fifths, remainder 

 brown, paler at apex; 5 yellow in basal third, thence brown, somewhat 

 annulate with paler, the apex darkest; 6 a rich nut-brown in basal two- 

 thirds, the remainder and all of 7-8 mouse-gray. 



Prothorax about 1.2 times the length of head and about 1.5 times as 

 wide as long; pronotum smooth; two strong dark bristles, distinctly 

 longer than interocellars, at posterior angles; all other bristles small, 

 brown in color, and quite distinct, the mediad posterior marginal pair 

 and one or two sublateral pairs slightly larger. Wings of fore pair fifteen 

 times as long as width at middle, pale yellowish with two dark brown 

 bands occupying approximately the second and fourth fourths; fore vein 

 with seven dark bristles near base (the last one just within the first dark 

 band) and three widely separated ones in apical portion; hind vein with 

 a series of about thirteen equidistant bristles beginning behind the last 

 one in the basal series of the fore vein. Legs uniform lemon yellow. 



Abdomen or normal form, almost without sculpture, lemon yellow in 

 color, with dorsal dark brown blotches on each of tergites 2-4, occupying 

 all except the posterior lateral angles; segment 5 uniform yellow; tergites 

 6 and 7 dark brown ; 8 with a transverse, elliptical blotch occupying a 

 little more than the basal half of the segment and extending well to the 

 sides ; 9 abruptly dark brown beyond basal sixth ; 10 dark brown ; segment 

 8 with a very fine regular, close, complete comb ; segment 10 divided 

 above almost to base ; abdominal bristles long, strong, nearly black. 



Measurements of holotype: Length 1.64 mm. ; head, length 0.150 mm., 

 width 0.192 mm.; prothorax, length 0.175 mm., width 0.268 mm.; 



