BAGNALL'S THYSANOPTERA 51 



of the yellow abdomen of the male. It has further been claimed that the setae on 

 tergite ten are not fan-shaped. However, in a long series of males from India and 

 Pakistan in the British Museum (Natural History) these setae frequently appear to 

 be acute due to the fan being orientated vertically. The expanded nature of the 

 setae can then only be determined by the use of an oil immersion lens. Furthermore, 

 the dark colour of the females is not constant. It seems possible that these three 

 species are synonymous. 



Syntypes $. Ceylon : on vines (E. E. Green). 



SCIRTOTHRIPS Shull 



Scirtothrips Shull, 1909 : 222. Type-species S. ruthveni Shull, by monotypy. 

 Sericothripoides Bagnall, 1929c! : 69. Type-species Dendrothrips bispinosus, by monotypy. 

 Scirtothrips Shull ; Bailey, 1964 : 329-362. 



Bagnall compared his new genus to Sericothrips Haliday, but apart from the reduc- 

 tion in number of setae on the second vein of the fore wing the type-species, bispino- 

 sus, cannot be readily distinguished from other Scirtothrips species. Bailey gives 

 Sericothripoides as a synonym of Dendrothrips, but the fore wing of the latter is 

 highly distinctive with the anterior fringe cilia arising submarginally and not 

 extending around the rounded wing apex. 



Scirtothrips bispinosus (Bagnall) 



Dendrothrips bispinosus Bagnall, 1924c! : 455. 

 Sericothripoides bispinosus (Bagnall) Bagnall, 1929c! : 69. 

 Scirtothrips bispinosus (Bagnall) Mound, 1968a : [in press] 



As in other species of Scirtothrips, there are three pairs of ocellar setae ; pair I 

 anterior to the first ocellus, pair II lateral to the first ocellus near the compound eyes, 

 pair III between the posterior ocelli. The fore wing in no way resembles Dendro- 

 thrips species, but differs from most Scirtothrips species in the reduction in number of 

 setae on the hind vein. In the lectotype there are eight setae on the fore vein, but in 

 two of the paratypes there are seven setae on the fore vein and one on the hind vein. 

 Similar variation occurs in material of this species from Travancore, India, at the 

 British Museum (Natural History). The metanotum is reticulate and the sternites 

 are devoid of microtrichia medially. Bagnall's indication that this species was 

 based on a male was apparently due to a misprint. 



LECTOTYPE $. India : Nilgiri Hills, Kotagiri, Tea, 6.vii.i922 (Ramakrishna) . 



Scirtothrips dorsalis Hood 



Scirtothrips dorsalis Hood, 1919b : 90-91 (April). 

 Heliothrips minutissimus Bagnall, 1919 : 260 (October). 

 Scirtothrips dorsalis Hood ; Mound, 1968a : 



In this species the microtrichia extend across the posterior half of the median part 

 of the sternites. Ocellar setae III are on the posterior margin of the ocellar triangle, 



