372 mi;, e. s. bagnall : contribution towards a 



Tube more slender, and at least as long as head ; 

 bristles at apex of ninth abdominal segment three- 

 quarters the length of tube 5 foveicoUis (Bagaall). 



b. Head more slender, about three times as long as 

 broad; third antennal segment less than one-half 

 the length of head, and the three apical segments 

 together one and two-thirds as long as the fourth 

 joint; prothorax smooth; seventh and eighth 



abdominal segments subequal J Icevicollis, sp. u. 



Tube stouter, and not so long as the head ; bristles 



at apex of ninth segments as long as tube $ Icevicollis, sp. n. 



2. Head verj slightly produced beyond the eyes ; bristles at 



apex of ninth abdominal segment louger, or at least as 



long as the tube ; eighth abdominal segment considerably 



shorter than the seventh *. 



i. Head longer, two and three-quarters as long as broad ; 



eyes occupying laterally about one-quarter the length 



of head ; tube a little more than two-thirds the length 



of head; bristle at each posterior angle of the prothorax 



weaker and not so long c? distinctus, sp. n. 



ii. Head shorter, two and one-third times as long as broad ; 

 eyes occupying laterally not quite one-third the length 

 of head ; tube three-quarters the length of head ; 

 bristles at each posterior angle of prothorax longer and 

 stronger § brevicomis, sp. n. 



DiCAIOTHRIPS NITIDUS, sp. iiov. (PL 51. fig. 10 ; PI. 52. fig. 7.) 



c^ . Length b'2 mm., breadth o£ mesothorax 0'75 mm. 



Colour shining black, tarsi brownish. 



Head cylindrical, nearly three and one-half times as long as wide at base ; 

 narrowed behind eyes and slightly widened towards base ; vertex produced 

 beyond eyes for about one-fifth the total length of head. Cheeks set with a 

 few short, subequal spines, and a long lateral one behind each eye. Eyes 

 comparatively large and finely facetted, bulging strongly, the width across 

 them being one and one-quarter times the width of head near base ; post- 

 ocular spines present, but not long. Ocelli large, posterior pair near to inner 

 margins of eyes and placed above a line drawn across their anterior third, 

 the space between the ocelli being only slightly more than the diameter of 

 one of them ; anterior ocellus near the vertex, protected by a pair of long, 

 strong, black bristles. Antennae inserted at extreme apex of head, 

 unfortunately broken ; two basal joints cylindrical and subequal in length. 



Prothorax one-third the length of head, and nearly twice as broad as long ; 

 strongly convex, shining and glabrous ; only very slightly widened to base ; 

 fore-angles broadly rounded, depressed ; a rather deep, transverse depression 

 before base, and a few irregular, shallow, and unimportant foveae on each 



* We do not know the male of brevicomis, and cannot therefore state whether these latter 

 characteristics are applicable to that species or not. 



