290 Mr. R. S. Bagnall on new Thysanoptera. 



XXXVIT. — Brief Descriptions of new Thysanoptera. — I. 

 By Richard S. Bag-xall, F.L.S., F.E.S. (Hope 

 Department of Zoology, University Museum, Oxford). 



In this series of papers I propose to shortly describe new 

 Thysanoptera, or thrips, from various parts of the world, 

 though the collections in my hands at present are chiefly 

 from Africa and India. This material, for which my hearty 

 thanks is due, has been received from many sources, which I 

 will more particularly mention in several larger contributions 

 now in preparation. 



I am especially anxious to have material from Australia, 

 Japan, Asia (particularly from the north and west), Central 

 and South Africa, South America, and the Polynesian and 

 other groups of islands. 



Suborder Terebrantia. 



Family ThripicUe. 

 Retithrips bicolor, sp. n. (Vine thrips). 



? . — Length about 1*6 mm. 



Rich golden-yellow, tinged lightly with brown ; head, 

 mesothorax, and metathorax (the latter anteriorly and late- 

 rally only) dark brown ; legs yellow and antennas light 

 lemon-yellow. Sculpture and reticulation very strong. 

 Vertex of head broadly raised, arcuate, with a median break ; 

 cheeks converging from behind eyes, slightly sinuate. Max- 

 illary palpi apparently 4-jointed, the basal joint as long as 

 the other three (? or two) together. Antennas set below 

 vertex, distant at base, very slender, and more than twice as 

 long as the head ; joints 3 to 6 more or less claviform ; 3 as 

 long as the two basal joints together, 4 slightly shorter than 

 3, and 5 and 6 about two-thirds ('66) the length of 4. Pro- 

 thorax shorter than the head. Wings with cilia (which are 

 smoky brown) on lower margins only ; lower wing with dark 

 median vein from base to apex. 



In my two preparations with wings expanded I have been, 

 as yet, unable to make out any arrangement of spines. 



<$ . — Length 1*15 mm. 



Abdominal sternites 3 to 7 (?2 to 6) with a roundish pale 

 depression. Tenth abdominal segment with a pair of stout 

 lateral bristles, which are apically strongly flattened out in 

 the form of a broad V, with the apex truncate. 



Hab. Ceylon, on vine (E. E. Green). 



