5SS Mr. R. S. Bagnall oti ne%o Thysanoptera. 



lloek clescrihetl, from tlie 'Challenger' Expedition, two 

 species, N. fascnm, from 25 fathoms off Royal Sound, 

 Kergueleu, and N. meridionah, from 1675 fathoms in the 

 Antarctic Ocean, which he compared with Miers's (or, rather, 

 Bohm's) species, in each case mentioning as one of the chief 

 differences the form of the ocular tubercle. Hodgson * has 

 recently commented on the difficulty of distinguishing these 

 species from each other and from N. antarcticum [iSf. gra- 

 cilipes). 1 have compared the types of all three species, and 

 I am no more able than Mr. Hodgson to indicate satisfactory 

 distinctions between them. The only difference that seems 

 at all likely to be of importance is in the form of the chela, 

 which, in JV. f/t-acilipes, is a good deal elongated, the palm 

 being more than twice as long as wide. In the other two 

 forms the palm is less than twice as long as wide and the 

 fingers correspondingly shorter. The other differences in 

 proportion shown by the measurements given above (including 

 the relative lengths of tarsus and propodus mentioned by 

 Hodgson) seem to be insignificant. 



LIV. — Brief Descriptions of neio Thysanoptera. — VI. 

 By Richard S. Bagnall, F.L.S. 



Suborder Terebrantia. 



Family TliripidsB. 



Genus HOMOTHUIPS, nov. 



Head transverse, cheeks diverging posteriorly. Antennaj 

 of usual Thripid type, but iiaving a 3-jointed style which is 

 not quite so long as the sixth joint. Mouth-cone constricted 

 near middle, reaching across prosternum ; maxillary })alpi 

 long, 3-jointed, the middle joint the shortest. A pair of 

 very long fine inter-ocellar bristles, and four immediately 

 behind anteimae between eyes. Prothorax transverse, witii 

 two long bristles at each hind angle. Fore-legs simple. 

 Wings well-developed ; fore-wings with both veins regularly 

 set with setse. Abdomen elongate ; last two segments 

 normal, and bristles on them long. 



Type. Homothrips distinctus, mihi. 



This genus differs from all genera excepting Rhampothrij^s, 



* Anu. & Mag. Nat. Hist. (8) xv. p. 142 (1915). 



