BAGNALL'S THYSANOPTERA 29 



position of the setae and pori on the abdominal tergites. The weakly sclerotized 

 posterior marginal fringe of the abdominal tergites is distinctly scalloped in venustus, 

 the type of Bregmatothrips, weakly scalloped in ramakrishnae, and slightly indented 

 in brachycephalus, the type of Neolimothrips. Similarly, the presence of a septum 

 in the elongate distal segment of the maxillary palps in venustus, which is apparently 

 not developed in brachycephalus, is a matter of degree rather than a basic difference. 

 In addition to the characters given by Ananthakrishnan, these two Indian species 

 can be recognized by the differences in sculpture on the metanotum. 



LECTOTYPE $. [India : South Arcot, Palur, on Sugar Cane leaf tips, 29.x. 

 1918], Reg. 238. 



Bregmatothrips saccharicola Bagnall 



Bregmatothrips saccharicola Bagnall, 1 92 3c : 626-627. 



This species is known from a single teneral female from which the antennae are 

 missing. It differs from other Bregmatothrips species in having longitudinal stria- 

 tions on the metanotum, the median pair of postocular setae anterior to the sub- 

 median pair, and the abdominal tergites with sculpture extending across the median 

 part of these sclerites. The first vein of the fore wing bears about nine setae distal 

 to the junction of the first and second veins. The maxillary palpi are not visible, 

 but there are three pairs of ocellar setae, pair three being on the anterior margins of 

 the ocellar triangle and rather longer than the side of the triangle. 



Holotype $. Sudan : Khartoum, on green Sugar Cane, vii.1910 (King). 

 Caliothrips graminicola (Bagnall & Cameron) 



Hercothrips graminicola Bagnall & Cameron, 1932c! : 417-418. 

 Caliothrips graminicola (Bagnall & Cameron) ; Faure, 1957 : 79-88. 



This species is very close to indicus and is known from Sudan, Rhodesia and South 

 Africa. 



LECTOTYPE $. Sudan : Wad Medani, Gezira Research Farm, on Naal grass, 

 18. ix. 1930 (W. P. L. Cameron). 



Caliothrips impurus (Priesner) 



Heliothrips impurus Priesner, 1927b : 61. 



Hercothrips fumipennis Bagnall & Cameron, 1932c! : 413-415. 



Caliothrips impurus (Priesner) ; Faure, 1962 : 14. 



Originally described from Southern Nigeria, this species is known from Gambia, 

 Sudan, Eritraea and Rhodesia. It can be a serious pest of seedling cotton but may 

 build up large populations on other plants, particularly Arachis hypogoea. 



Syntypes of fumipennis $$ ^- Sudan : Khartoum, Wellcome Trust Research 

 Laboratories, on Cotton leaves, 2.x. 1926 (W. P. L. Cameron). 



