264 Mr. R. S. Baguall on new Thysanoptera. 



In the type-specimen $ of melanommata the chief bristles 

 at hind angles of abdominal segments 9 and 10 are long and 

 moderately stout, whilst there is a pair of short rather slender 

 seta? on the ninth tergite placed close to the posterior margin, 

 one on each side of the mid-line, the distance separating them 

 being about 0'6 the length of the seta, and a long bristle 

 situated between the postero-median pair and the posterior 

 angles. 



In my Trinidad examples now doubtfully referred to 

 cephalica there is a single available <J , the bristles at poste- 

 rior angles of the abdominal segments 9 and 10 are very 

 much stouter; there is a pair of postero-median setge ranch 

 as in melanommata, but stouter and more spine-like, whilst 

 there is a more widely separated pair of weaker and shorter 

 setse situated on a higher plane, the arrangement being 

 roughly an obverse arc. 



Franhliniella distinguenda, sp. n. 



$ . — Length c. l'O mm. 



Very like F. melanommata, but paler, very slightly 

 smaller, more slender, with distinctly shorter and stouter 

 antennas. Head transverse, about 1*4 times as broad as 

 long. Cheeks weakly arched, subparallel ; interocellar and 

 postocular spines present, very short and weak. Antennas a 

 little more than twice as long as the head, pale, first joint 

 almost white, 3 to 5 faintly tinged with greyish-brown 

 distally, 6 to 8 of a uniform light grey-brown. Relative 

 length of antenna] segments 3 to 8 approximately as 

 follows :— 54 (with pedicel) : 48 : 39 : 52 : 8 : 12. 



Pronotum longer than the head, the two pairs of bristles 

 at posterior angles and the antero-angular pair long; the 

 inner of the postero-angular pairs distinctly longer than the 

 outer, about 0*55 as long as the pronotum ; the outer postero- 

 angular and the antero-angular pair subequal, 0*4 the length 

 of the pronotum. The postero-marginal median pair smaller 

 still, widely spaced, containing a pair of minor setae between 

 them and three minor setae on each side. Number of spines 

 on the costa, fore-vein, and hind-vein of fore-wing approxi- 

 mately as follows: — 23, 3 + 16, and 16 respectively. Seg- 

 ments 9 and 10 of abdomen rather long, terminal bristles 

 moderately long, slender. 



c? • — Much as in the $ , smaller and more slender. Macro- 

 chretpe of the terminal abdominal segments long, stout. 

 Tergite 9 as described for F. melanommata ; with a minor 



