THYSANOPTERA FROM THE WEST INDIES. 497 



but shorter white area just before the distal twelfth ; hind wings clear, with 

 a faint trace of grey corresponding with the dark areas of the fore-wing. 



Head and thorax difficult to describe from the single preparation owing 

 to the extreme difficulty in obtaining an exact dorsal view. Head more or 

 less subglobular in form, cheeks roundly constricted to base, with a few- 

 small setse. Eyes irregularly and somewhat coarsely facetted, some of the 

 facets beneath being extraordinarily large ; facets not touching ; minutely 

 pilose ; upper portion occupying about 0*5 the length of head. Posterior 

 ocelli somewhat large, placed above a line drawn across the posterior fourth 

 of eyes ; anterior one much smaller, protected by two long bristles placed 

 rather closely together on a line across the front of posterior pair. A pair 

 of short dorsal setse on a line behind eyes, approximately behind the posterior 

 ocelli. Antennas very long and slender, about 3*5 times as long as the head^ 

 pilose ; basal joints subapproximate ; 2 cylindrical, twice as long as 

 broad ; 3 with short stem, about 15 times as long as broad ; 4 also long and 

 slender, a shade broader than 3 and about 9 times as long as broad ; 5 to 7 

 slightly broader ; 8 rapidly narrowing from about middle, distally and 

 broadly united to 9, which is almost styliform. R-elative lengths of joints — 

 12:17:80:55:25:18:16:14:5-5. Palpi 3/2.jointed. Head ventrally 

 arcuate below insertion of antennae and furnished with numerous hairs, 

 the inmost pair the longest. 



Prothorax apparently not broader than the head and converging basally, 

 about as long as the head and 0*8 as long as broad across fore-angles; no 

 prominent bristles and surface irregularly, sparsely, and minutely setose. 

 Pterothorax long and narrow, 1"25 times as long as wide^ broadest across 

 base of mesothorax, where it is twice as broad as at juncture with prothorax ; 

 sides roundly widened, and sides of metathorax narrowed to base, 0*65 as 

 wide across posterior coxse as across mesothorax. Legs long, setose, the 

 setoe arranged in more or less regular rows, femora thickening distally ; 

 structure of fore-tarsus typically JEolothripid. Wings reaching to about 

 the 7th abdominal segment ; fore- wing broadened distally, rounded at tip, 

 longitudinal veins indistinct but clearly defined by setse ; cross-veins absent. 

 Costal bristles slender, 35, ending at extreme apex ; whole length of upper 

 vein with 22 and hind vein with 16 short setse — more widely spaced on 

 central clear patch, none on distal clear patch, and 2 + 2 on distal dark 

 area. Cilia on fore-margin of hind-wing sparse, only a little longer than 

 the breadth of the wing; those forming lower fringes of both fore- and 

 hind- wings long. 



Abdomen subpetiolate, very narrow at juncture with thorax, broadening 

 evenly to 6th segment, where it is 1"5 times as broad as the pterothorax and 

 more than 2'5 times as broad as the posterior margin ol 1. 9 abruptly 

 narrowed to base of 8, and 8 and 9 roughly obconical ; 9 with one long 

 lateral bristle near middle and two pairs of similar bristles on posterior 



