NEW GENERA AND SPECIES OF THYSANOPTERA 209 



situated above a line drawn through centre of eyes, and close 

 to the inner margin of each. Owing to the raised vertex the 

 three ocelli are on a higher level than the eyes. Mouth-co7te 

 short and rounded at apex. Antennce. approximate at base, 

 inserted under the vertex, longer than the head and prothorax 

 together, and very slender. Basal joint concealed at base; 

 joints three to six elongate and claviform; apical joints fusi- 

 form. Third joint more than three times the length of basal 

 joints together; fourth nearly two-thirds of third ; fifth four- 

 fifths of fourth ; sixth shorter than the preceding, and equal 

 in length to the penultimate and apical together. Basal joint 

 concolorous with the head ; second brown, and the others 

 yellow, each joint being slightly darker at apex ; joints seven 

 and eight being brownish yellow. Antennal spines and sense- 

 cones light and inconspicuous, apparently two long and acute 

 sense-cones on each of the joints three to six. Owing to the 

 light color of the antennal sense-cones and spines these organs 

 are very difficult to see, and in one specimen there appears to 

 be but a single sense-cone on joint three, which is on the outer 

 side, and also on joint six, which is on the inner side ; and 

 there appear to be three or even four on the fourth joint. It is 

 practically impossible, however, to make any definite state- 

 ment with regard to these organs when the insect is dry and 

 gummed on a card. 



Prothorax small, a little more than one-third the length of 

 head; transverse, widest at middle, and from thence strongly 

 narrowed on both sides to the anterior and posterior margins 

 respectively; spines inconspicuous. A fairly prominent spine 

 on each fore-coxa. Fterothorax broader than prothorax, more 

 than twice the width of the head ; mesosternum broader than 

 metasternum, but not so long; sides of the latter unevenly 

 rounded and slightly narrowed to base of abdomen, possessing 

 several minute white bristles. Wings short, apparently reach- 

 ing nearly to the apex of the fifth abdominal segment. All 

 legs long and slender, the posterior pair being the longest; the 

 fore-femora very slightly enlarged, unarmed, and each fore- 

 tarsus armed with a small sharp-pointed tooth. Surface of 



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