KNOWLEDGE OF THE NEOTKOPICAL THYSANOPTBRA. 371 



them both from D. foveicollis, and from all the species (in which the antennae 

 are preserved) dealt with in this paper. I am fortunate enough to possess 

 Heeger's original drawings of Thrips, and the plate " TJirips, L., Physapus, 

 Be G. Lat., Sp. Sclwtti " would make it appear that D. Schotti was a shining 

 black insect, with the antennae entirely concolorous with the body, whilst 

 Buffa says that his species has the third antennal joint clear yellow. In any 

 case D. foveicollis cannot be referred to either of these forms, nor do I feel 

 justified in referring any of the other species that have passed through my 

 hands to Heeger's Schotti. I hope that it will be possible to satisfy ourselves 

 on the identity of Heeger's species by an examination of his type. 



In the following Table the male characters (with but one exception) are 

 adopted : — 



I. Head produced beyond the eyes for at least the length of 

 eye, and for more than the width at the base of the produced 

 part; post-ocular bristles present in the male; bristles at 

 apex of ninth abdominal segment as long as the tube .... d" nitidus, sp. n. 

 II. Head produced beyond the eyes for less than the length of 

 eye, and for less than the width of the produced part ; post- 

 ocu'ar bristles absent in the male (excepting in D, Cham- 

 2iioni) ; bristles at apex of ninth abdominal segment (ex- 

 cepting in D. distinctus) distinctly shorter than the tube. 

 1. Head more strongly produced beyond eyes; bristles at 



apex of ninth abdominal segment shorter than the tube ; 



eighth abdominal segment either longer than, as long as, 



or only slightly shorter than the seventh. 



1. Post-ocular bristles present 6 Championi, sp. n. 



ii. Post-ocular bristles apparently absent. 



A. Eighth abdominal segment decidedly longer than the 



seventh ; tube shorter than the eighth segment. 



a. Size larger (13'0 mm.) ; head more than three times 



as long as broad ; lateral cephalic spines very long 

 and irregular ; tube more than seven times as long 

 as broad at base, and nearly as long as the head . . S grandis, sp. n, 



b. Size smaller (about 9-0 mm.) ; head less than three 



times as long as broad; lateral cephalic spines 

 short and regular ; tube less than five times as 

 long as broad at base, and only two-thirds the 

 length of head 6 iJi'opinqnus, sp. u. 



B, Eighth abdominal segment as long as, or slightly 



shorter than the seventh ; tube longer than either 

 the seventh or eighth segments. 

 a. Head about two and one-half times as long as 



broad ; third antennal segment one-half the 



length of head, and the three apical segments 



together as long as the fourth joint ; prothorax 



foveolate ; eighth abdominal segment shorter than 



the seventh ......,,,..,,,,,,...,,. cS foveicollis (Bagnall). 



