SOME NEW AND LITTLE-KNOWN EXOTIC THYSANOPTERA 527 



Dlcaiothrips denticollis sp. n. (PI. xiv., fig. 5). 



¥. Length 6-25 mm.; breadth of mesothorax 075 mm. 



Very Uke the preceding, differing chiefly in the larger size 

 and the coloration of the antennae, which have the third joint 

 only of a clear yellow colour, shaded at apex with brown, 

 the rest of the antennae being concolorous with the head. 

 The third antennal joint is also slightly longer than the 

 fourth. 



In the prothorax we notice a distinct tooth-like projection 

 at each mid-lateral angle which we have not observed before 

 in any species of Dicaiothrips or Idolothrips. The prothoracic 

 bristles are all apparently present, the mid-lateral pair and 

 those at the anterior angles being somewhat remote from 

 the lateral margin. The tube is nine-tenths the length of 

 the head. 



The general colour is light brown (perhaps the example is 

 somewhat immature), and the body shows considerable and 

 widely distributed crimson hypodermal pigmentation. 



Type. — In coll. Bagnall. 



Habitat. — One $ from the Isle of Nias (K. Jordan). 



The single specimen is a female, and we are therefore 

 unable to compare it with the other members of the genus, 

 though its close relationship with D. malayensis, described 

 above, will help us to recognize the species. The coloration 

 of the antennae is at once distinctive, and is the same as 

 described by Buffa in the male specimens from the Isle of 

 Engano, and referred by him to the Idolothrips schxtti 

 (Heeger) Uzel, sinking the writer's I. foveicollis as a synonym. 

 Although Buffa gives the size of his examples as 8*2 mm., it is 

 possible that they are referable to the species now described ; 

 in any case neither D. denticollis nor Buffa's D. schatti can 

 be referred to D. foveicollis, nor can either, we think, be 

 the same as the species schcetti, described by Heeger from 

 Brazil. 



