272 



A REMAKKABLE NEW GALIi-THRIPS FEOM AUSTRALIA, 



long as head. These two forms correspond to already known forms of some 

 Tubulifera, e.g., the Australian Hapilothrips hraccatus c? (Kamy, Treubia, ii., 

 1, 1921, p. 30) or the Javanese Mesothrips pyctes (Kamy, Zeitsehr. wiss. Ins. Biol., 

 xii., 1916, p. 191). 



Measurements of a small mMcropterous female : Total length of antennae 

 0.38 mm.; joint 1, 0.025 mm. long, 0.04 mm. wide; joint 2, 0.045 mm. long, 0.035 

 mm. wide; joint 3, 0.06 mm. long, 0.035 mm. wide; joint 4, 0.06 mm. long, 0.04 

 mm. wide; joint 5, 0.06 mm. long, 0.035 mm. wide; joint 6, 0.055 mm. long, 0.03 

 mm. wide; joint 7, 0.05 mm. long, 0.022 mm. wide; joint 8, 0.025 mm. long, 

 0.013 mm. wide. Head 0.27 mm. long, 0.18 mm. wide. Prothorax 0.25 mm. 

 long, 0.33 mm. wide without fore-eoxae, 0.45 mm. wide including fore-coxae. 

 Fore-femora 0.37 mm. long, 0.16 mm. wide; fore-tibiae (including tarsi) 0.20 

 mm. long, 0.06 mm. wide. Pterothorax 0.35 mm. long, 0.42 mm. wide. Middle 

 femora 0.16 mm. long, 0.06 mm. wide; middle tibiae (including tai-si) 0.22 mm . 

 long, 0.05 mm. wide. Hind-femora 0.18 mm. long, 0.07 mm. wide; hind-tibiae 

 (including tarsi) 0.23 mm. long, 0.055 mm. wide. Length of wings (without 

 fringe) 1.0 mm. Abdomen (including tube) 1.5 mm. long, 0.38 mm. wide. 

 Length of tube 0.14 mm., width at base 0.07 mm., at apex 0.03 mm. 



I have given here the measurement of all forms from female specimens, in 

 order to show that all these differences occur in the same sex, and may not be 

 mistaken for sexual dimorphism. All these forms are to be found in the galls 

 together. 



There are further, in the material before me, specimens with extraordinary 

 contracted segments of body and antennae (Text-fig. 5), the head therefore 



Text-flg. 6. Thaumatothrips froggatti, n.gen. et. sp. 

 Life-cycle of macropterous form, (x 2/3.) 



appearing still shorter than in the above-described apterous form, and the 

 abdomen greatly dilated, resembling somewhat the Australian Liothripine genus 

 Aspidothrips (Karny, Act. Soc. Ent. Cech., xvii., 1920, p. 38). But these may 

 not be mistaken for a different form. These specimens are only a product of 



