THYSANOPTERA 685 



(2) Dolcrothrips Jlavipes, sp. nov. 



Plate XVIII. figs. 15—19. 



Length about 3 mm., breadth of mesothorax about 0"475 mm. 



Colour of head yellowish-brown, darker at sides and near vertex ; prothorax and 

 pterothorax reddish-brown with sides darker, base and sides of the abdominal segments 

 and the tube, excepting near tip, in most specimens blackish-brown ; legs clear yellow ; 

 antennae with the two basal joints brown, third and fourth yellowish-brown, shaded 

 darker at apical half, fifth and sixth brown but yellow at stems, and the apical joints 

 wholly brown. In dried specimens the thorax and abdomen are blackish-brown with 

 a light patch on the disc of the pterothorax and similar light patches at each side of 

 at least abdominal segfments five to eig-ht, and the lees have also a reddish tinge. 



Head only a little longer than prothorax and two-thirds as broad at base as long ; 

 surface rough ; cheeks roundly narrowing behind eyes and converging to base. Eyes 

 somewhat small and finely faceted, occupying laterally less than one-quarter the total 

 length of head ; postocular bristles placed at some distance behind the eyes, long and 

 slender. Ocelli large, the anterior one at the extreme apex, which is slightly raised, 

 and the posterior pair near to the inner margins of the eyes and on a line drawn 

 through their centres. Mouth-cone broadly rounded at tip reaching about two-thirds 

 the way across the prosternum. Maxillary palpi rather short and stout. Antennae 

 about one and two-thirds the length of head ; basal joints sub-approximate, second 

 about as long as basal one, narrower and constricted near base ; joints three to six 

 broadly claviform, third joint one and one-half times as long as the second and twice as 

 long as the breadth near apex ; fourth, five-sixths of third ; fifth, five-sixths of fourth ; 

 sixth, four-fifths of fifth ; seventh joint much narrower than the preceding and four-fifths 

 its length, slightly constricted at base ; apical joint narrowed to tip. 



Sense-cones acute and moderately long, a pair on each of the segments three to 

 six, those on the sixth segment being longer and stouter than the others. Bristles 

 slender, light coloured and inconspicuous. 



Prothorax rapidly widened to the mid-line, dorsal surface moderately convex, about 

 three-fifths as wide as long, and the anterior margin slightly emarginate. Bristles at 

 each posterior angle, posterior-marginal and mid-lateral pairs very long and slender, 

 colourless ; anterior-marginal pair obsolete, and pair at anterior angles very short. 

 Pterothorax about four-fifths as long as broad, broader than prothorax but not as 

 broad as width across fore-coxae ; sides of metathorax only slightly narrowed to base of 

 abdomen. 



Wings absent ; legs moderately long, fore-coxa armed with several short and stout 

 spines, fore-femur incrassate, fore-tibia stout and the tarsus armed with a strong tooth. 



Abdomen much stouter than pterothora.x with segments strongly transverse, 

 gradually narrowing from fifth segment to the eighth and from thence roundly narrowed 



F. H. III. 88 



