NO. 1590. OX SOME NEW WEST INDIAN THRIPS— FRANKLIN. 721 



Spines on the six basal segments for the most part very long, dark 

 colored and conspicuous; those on the third, fourth, and fifth seg- 

 ments especially so; the conspicuous spines on these three segments 

 arise from somewhere near around the middle of the segments. The 

 third and fourth segments each bear prominent and well-developed 

 forked sense cones. 



Prothorax transverse, only about two-thirds as long as the head but 

 from two to two and two-thirds times as wide as it is long; rounded 

 at the angles; rather suddenly constricted in front; surface hnely 

 cross striated; on the extreme sides of the anterior margin there is 

 a single noticeable rather short curved spine on each side: also near 

 this margin, on each side of the dorsum, there is a single noticeable 

 spine at some little distance from the middle line ; near each posterior 

 angle there is another similar spine, and near the hind margin on 

 each side of the middle line there is still another. Mesothorax 

 strongly reticulated on the sides; mesoscutum with a pair of notice- 

 able spines on each side, placed toward the extreme sides, the hinder 

 one of each pair being somewhat the smaller; on each side of and 

 at some distance from the middle there is another pair of spines, 

 the hinder spine of each pair being stronger than the anterior one 

 and placed at a greater distance from the middle line. Surface of 

 mesoscutum finely cross striate like the pronotum; mesosternum not 

 reticulated except on its extreme sides; metathorax slightly narrower 

 than mesothorax; metascutum strongly reticulated with a small but 

 noticeable spine on each side almost on the anterior margin and not 

 very far from the angles; there is also a pair of very conspicuous 

 spines, one on each side, at about the middle of the median triangular 

 portion. Sides of metathorax strongly reticulated; metasternnm 

 not reticulated except on extreme sides. Endothoracic invaginations 

 of metathorax extending forward slightly- into the mesothorax. Fore 

 wings uniform brown in color, reaching to or beyond the end of the 

 abdomen; rather slender (about thirteen times as long as they are 

 wide in the middle) but apparently quite powerful; hind IVinges 

 very long, more than one-half as long as the wdngs themselves, con- 

 colorous with the wings as are als^i the scales. 



Spines on veins long and stout, dark colored and set at uniform 

 distances except toward the tip of the wing where they are less reg- 

 ular and farther apart; the costa bears thirteen or fourteen, fore 

 vein ten to twelve, hind vein ten or eleven, scale three or four besides 

 a pair at its tip. Anterior fringe of fore wangs of strong but not 

 very long hairs, concolorous with the spines on the veins, much darker 

 brown than the wings themselves. Hind wings with their outer 

 halves strongly tinged with brown but with their basal halves light 

 and clear; with a very noticeable vein of a darker coloi- than the 

 remainder of the wing running down the middle of each; both fore 



