532 SOME NEW AND LITTLE-KNOWN EXOTIC THYSANOPTERA 



Mouth-cone small, scarcely reaching one-third of the way 

 across the prothorax. 



Prothorax long and heavy, one and one-quarter the length 

 of head, and less than two-thirds as long as the width across 

 fore-coxae. Similar to the prothorax of P. antennatus, with 

 notum not attaining the lateral margins, a prominent median 

 line, and all spines absent excepting only the pair at posterior 

 angles, which in P. collaris is apparently represented by the 

 seta-pits only, though the bristles may be present but difficult 

 to discern, owing to the deep pigmentation of the chitin. Ptero- 

 thorax very slightly broader than long, and only a little wider 

 than the prothorax at base ; not strongly arcuate at sides as 

 in P. anteiinahis, but slightly narrowed towards the base of 

 abdomen from the anterior margins of the metathorax. Wings 

 reaching to base of tube, slightly narrowed at tip, and each 

 with a faint median vein running from base to extreme apex ; 

 colour faintly sulphureous ; cilia long. Fore-legs strongly 

 incrassate, tibial spur difficult to make out owing to the legs 

 in the type specimen being set beneath the head ; fore-tarsal 

 tooth large, and as broad at base as long. Intermediate tibia 

 with a long stout spur, and the hind tibia with two (or perhaps 

 three, a long central one and a shorter one on each side) 

 longer and stouter spurs at the tip within. 



Abdomen slightly narrower than pterothorax, sides parallel 

 to the sixth segment, and from thence roundly narrowed to 

 base of tube. Tube about seven-eighths the length of the 

 head, narrowed somewhat sharply at tip. Terminal bristles 

 and those on the ninth abdominal segment longer than the 

 tube. 



Type. — In coll. Bagnall. 



Habitat. — A single $ collected by Dr. Jordan from the Isle 

 of Nias. 



P. collaris may be easily separated from P. antennatus 

 Hood by its larger size and darker coloration ; the apical 

 antennal joint, which is not distinctly longer than the penulti- 

 mate ; the shorter head and larger eyes ; the longer tube ; and 



