NEW GENERA AND SPECIES OF THYSANOPTERA 207 



The genera may be provisionally tabulated as under : — 



I. Abdominal segments two to eight each armed laterally with a 



strong tooth. Genus Acanthinothrips nov. 



II. Abdominal segments simple : 



A. Head greatly produced beyond the eyes ; each anterior 



prothoracic angle in the form of a recurved horn ; fore- 

 femora armed ; tube shorter than the ninth abdominal 

 segment. Genus Mecynothrips Bagnall 



B. Head not, or only slightly, produced beyond the eyes ; 

 prothorax and fore-femora simple ; tube longer than the 

 ninth abdominal segment : 



i. Head shorter ; cheeks not set with spines ; prothorax 

 strongly transverse, neither tuberculate or sculptured; 

 tube four times the length of the ninth abdominal 

 segment. Genus Panurothrips nov. 



ii. Head longer ; cheeks more or less strongly set with 

 spines ; prothorax tuberculate or sculptured ; tJibe 

 less than four times the length of ninth abdominal 

 segment. Genus Idolothrips Haliday 



Genus ACANTHINOTHRIPS* nov. (PI. VI., figs. 5-6). 



Head more or less cylindrical, three times as long as the 

 prothorax, but not quite three times the length of its breadth ; 

 not greatly produced beyond eyes. Cheeks slightly swollen at 

 base, set with spines. Eyes large. Antenna very long and 

 slender, three times the length of head. P?-othorax simple. 

 Legs long and slender ; all coxae projecting. Wings present. 

 Abdomen very long and narrow ; second to eighth segments 

 armed at each side with a stout backwardly curved tooth, the 

 pair on segment eight being the longest and stoutest ; ninth 

 segment short, armed at apex with a series of short, stout 

 spines. Tube very long, not strictly cylindrical, six times the 

 length of the ninth segment, twelve or more times as long as 

 broad, and twice the length of the head. 



Species large, up to 12 mm. 



Type — Acanthinothrips (Idolothrips) spectriim Haliday. 



Hab. — Australia. Described by Haliday on specimens 

 collected by Darwin, and since recorded from New South 

 Wales, Queensland, Tasmania, and Victoria. 



One specimen in the British Museum. 



* Acanthino- =thorny. 



