Mr. R. S. Bagnall on new Thysanoptera. 403 



b. Physopus group. • 



Thrips griseus, sp. n. 



? . — Size and general form as in T. physopus. 



Dark grey to grey-brown ; fore-tibiai light yellow shaded 

 on their outer margins with grey-brown ; all tarsi yellowish ; 

 fore-wings entirely grey, hind-wings lighter. Antenna? grey- 

 brown, joint 3 yellowish and 4 brownish-yellow basally. 

 5 lighter at extreme base. 



Head as in T. physopus, transverse, with cheeks widest 

 behind eyes and thence converging to base. Ocelli rather 

 large. Antennae much as in 2\ physopus, but with the inter- 

 mediate joints comparatively stouter; relative lengths of 

 joints 3 to 7 approximately as follows : — 20 (with stem) : 

 17 : 12 : 19 : 6. 



Prothorax wider than and at least as long as the head, 1*7 

 times as broad as long ; bristles at hind angles moderately 

 long and stout, 0"45 the length of the prothorax. Legs 

 moderately stout, hind tibiae witii a double row of six s[)ines 

 to apex within. Setse on costa and veins of fore-wings as in 

 T. physopus, dark. 



Bristles at apex of abdomen dark, long and strong, twice 

 as long as the segments carrying them ; a short and not very 

 strong dorsal pair on segment 9. Posterior margin of 

 tergite 8 with a short fringe, the cilia apparently running 

 in pairs ; segment 10 divided above. 



Sharply distinguished from 2\ physopus by the coloration 

 and form of antennae, and the colour generally. 



Type. Hope Department of Zoology, University Museum, 

 Oxford. 



Bab. Japan, 2 ? s, Kobe, vi. 15 {J. E. A. Lewis). 



Suborder T U B U L I F e E A. 



Family IdolothripidaB. 



Genus GriGANTOTHRlPS, Zimmermann. 



1900. Giganiothrips, Zimmermann, Bull, de I'lnst. Bot. de Buitenzorg, 



No. vii. 

 1908. Fanurothrips, Bagnall, Trans. Nat. Hist. Soc. Northumberland 



& Durham, n. s. iii. p. 208. 



Giganiothrips gracilis, Bagnall. 

 Fanurothrips gracilis, Bagnall, l. c. p. 208 (1908). 

 This species is closely relately to Giganiothrips elegans, 



