KNOWLEDGE OF THE NEOTROPICAL THYSANOPTEEA. 373 



side of median line. Spine at each posterior angle short and weak, set in 

 slight protuberance. Outer margin of fore-coxa angular, with long, stout 

 spine at apex of angle and two shorter ones below. Fore-femoi'a long and 

 stout, not quite one-quarter as broad as long ; tibia not quite as long as 

 femur, and the tarsus armed with a long, somewhat slender and acute tooth. 

 The outer margin of the fore-femur is armed with six or seven moderately 

 long, strong bristles, some of them being curved forwards, several shorter 

 ones, chiefly behind a line drawn across the middle of the femur, and some 

 slender ones near the apex, one or two of which are longer than any of the 

 others ; series on inner margin composed of short and slender setse. Inter- 

 mediate and hind-legs long and slender, femora armed with several long and 

 comparatively stout bristles, and all tibise with slender hairs, a few, below 

 each knee, being long ones. Pterothorax slightly broader than the width 

 across fore-coxa, almost square, the dorsal surface of the mesothorax being- 

 very distinctly reticulate. Wings reaching to the sixth abdominal segment. 



Abdomen about two-thirds the total length of insect, long and slender ; 

 none of the body-segments, however, being more than one and one-half times 

 the length of breadth. Ninth segment short, one-third the length of the 

 preceding. Tube four times the length of ninth segment, and two-thirds 

 the length of the head ; terminal hairs about as long as tube, vreak. Bristles 

 on ninth segment longer than tube, rather stout, the other abdominal hairs 

 being short and weak. 



Habitat. Brazil ; Montagues des Orgues, Rio de Janeiro. In the environs 

 of Tuuca at an altitude of from 600 to 1000 metres (i?. R. Wagner, 1901). 



Type. One male in Paris Museum. 



Apart from its shining black colour 1). rdtidus may be easily recognized 

 by the strongly produced head and by the long hairs on the ninth abdominal 

 segment which overreach the tip of the tube. The depressed fore-margin 

 of the prothorax is, I believe, a valuable character, and it will be noticed 

 that the post-ocular bristles are present. The tube is decidedly longer than 

 either the seventh or eighth abdominal segment. 



DiCAIOTHRIPS GEANDIS, Sp. UOV. (PI. 51. fig. 4 ; PI. 52. fig. 4.) 



cJ . Length 13 mm. 



General colour black, tibise and tarsi brownish. 



Head cylindrical, nearly three and one-half times as long as wide, narrowed 

 behind eyes and slightly widened before constriction at base ; vertex produced 

 beyond eyes for a little more than one-seventh the total length of head. 

 Cheeks set with a few long spines and several shorter ones. Eyes moderately 

 large and finely facetted, bulging ; post-ocular spines absent. Ocelli large, 

 posterior pair near to inner margins of eyes and just above the mid-line ; 

 anterior ocellus near vertex and protected by a pair of long bristles. 

 Antennae inserted at extreme apex of head, separated at base ; long and 



