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



honour, and, secondly, on account of its general interest in the 

 light of Mr. Reginald Kelly's ^ recent paper '^ Observations 

 on the Function of Acacia Leaf-glands," wherein he mentions 

 that microscopic insects, some white (? larval) and others 

 brown, are sometimes found in the so-called *' glands." 



R. froggattij apart from its minuteness, may be distin- 

 guished by its very broad form, the broad intermediate 

 antennal joints, the very short and broad prothorax and 

 abdominal segments, and the short broad tube, '(fee. 



Rhopalothnps hrunneus^ sp. n. 



? . — Length about 1*25 mm. 



Apterous. Very like R. froggatti, larger and more slender. 

 Dark black-brown, fore-tibige yellow near apex, other tibise 

 and all tarsi as in R.Jroggatti. Antennaj with joint 3 yellow 

 shaded with grey, 4 and 5 light brown, yellowish basally, and 

 6 with stem yellowish. 



Head as in F. froggatti, about as wide as long ; antennae 

 1'8 times as long as the head, intermediate antennal joints 

 not so broad compared to their length as m froggatti. 



Prothorax 0*75 as long as the head and 2"25 times as broad 

 as long. 



Abdomen elongate, roundly narrowed from segment 7 to 

 base of tube ; segment 4 about 4'5 times and 7 about 3'8 

 times as broad as long. Tube about 0'75 the length of head, 

 nearly twice as long as broad at base and about 0*5 as broad 

 at apex as at base ; terminal hairs pointed, a little more than 

 0"5 the length of the tube. 



All setae as m froggatti^ but longer. 



Type. Hope Department of Zoology, University Museum- 

 Oxford. 



Hah. Australia, Victoiia, on Acacia dealbata, 2 ?8 

 (R. Kelly). 



Sharply distinguished from froggatti by its larger size, 

 deeper colour, the coloration and more slender form of inter- 

 mediate antennal joints, the less broad form, &c. 



The coloration of both, froggatti and hrunneus distinguishes 

 them from the genotype, R. bicolor, Hood. 



* Vict. Nat. XXX., Nov. 1913, pp. 121-127. 



