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



3 yellowish ; 4-8 brown, but of a lighter shade than head. 

 Wings light smoky grey. 



Head 1*5 times as long as the prothorax and only about as 

 long as broad; eheeks apparently gently arched, with the 

 appearance of converging posteriorly (this point is not clear 

 in the unique preparation, due to pressure in mounting). 

 Eyes in their greatest dorsal length occupying about one-third 

 (0*33) the length of the head. Ocelli of moderate size, 

 posterior pair above a line drawn across centre of eyes, 

 anterior ocellus fonvardly directed. Postocular bristles broken 

 off in type. Antennae approximate at base, about 1*8 times 

 the length of the head; relative lengths of segments as 

 follows :— 10 : 14 : 15 : 15 : 14 : 14 : 14 : 11. Joints 2 to 7 

 practically subequal in length, gently .diminishing in breaJth ; 

 3 broadly and roundly clavate ; 8 pointed, slightly con- 

 stricted at base. Mouth-cone short, reaching about halfway 

 across prosternum, broadly rounded. 



Prothorax twice as broad as long, the greatest breadth 

 being scarcely narrower than width across t'ore-coxce. All 

 setae present and well-developed ; strongly dilated distally, 

 those at posterior angles about 0*45 and those at anterior 

 angles 0*3(5 the length of prothorax. A similar seta on each 

 fore-coxa ; fore-femur incrassate ; fore-tibia stout, apically 

 produced within into a sharp tooth ; fore-tarsus armed with a 

 short stout tooth. Pterothorax rather broader than long and 

 than width across fore-coxaj. Metathorax laterally con- 

 verging posteriorly. Wings slender, reaching to abdominal 

 segment 6, constricted in middle, sparsely fringed, the fore- 

 wing having four duplicated cilia. 



Abdomen elongate, only as broad as the pterothorax, 

 elongate, gradually narrowing from base of segment 7 to 

 tube. Tube about 0*7 as long as the head, 0*47 as broad at 

 base as long and nearly 0*6 (0'57) as broad at apex as at 

 base ; terminal hairs short and weak, about 0*4 the length of 

 the tube. Paired wing-retaining seta) up to and including 

 segment 7, the pair near posterior margin being stronger than 

 the median dorsal pair. Abdominal seta} slender, dilated at 

 apex, colourless, pointed pairs on 9 being as long as the tube. 



Abundantly distinct from P. semiflavus, Ilood, beth as 

 regards colour and structure, and necessitating some alight 

 amendment of the original diagnosis of the genus. 



Type. British Museum of Natural History (Imperial 

 Bureau of Entomology). 



