404 Mr. H. S. Bagnall on neio Thysanoptera, 



Mimm., but compared with specimens of the latter in my 

 collection [ex et teste Karnj)^ gracilis is larger and has the 

 tube very noticeably longer, about 0*5 as long again as in 

 elegans (18 : 12) ; viz., in gracilis about as long as the 

 abdominal segments 7-b together, and in elegans about 0"75 

 the length of those segments. 



Genus Elaphrothrips, BufFa. 



Idolothrips, Hinds, Bagnall, and others. 

 Elajihrothrips, Butfa, Redia, v. p. 162 (1909). 



Genus Idolothrips, Haliday. 



Idolothrips, Froggatt, Proc. Linn. Soc. N.S.W. 1904, pt. 1. 

 Acatithbiothrips, Bagnall, Trans. Nat. Hist. Soc. Nortliumljerland & 

 Durham, n. s. iii. p. 207 (1C08) (and others). 



Mr. Froggatt is undoubtedly right in assigning Idolothrips 

 marglnata and spectrum as ? and (J ^^ the one species, and 

 I withdraw anything I may have written in 1908 on that 

 point. I do not agree witli liim, however, in that /. lacertina, 

 Hal., is a " smaller and more variable form of the <S " 

 {spectrum). Regarding the female marginata as the geno- 

 type of Idolothrips^ I erected the genus Acaidhinothrips for 

 the strongly characterized species spectrum, but being sexes 

 of one species they must be placed in the genus Idolothrips^ 

 and the Idolothrips of most modern authors must be known 

 as Elaphroth7'ips. The females of the two genera are very 

 much alike. 



Idolothrips marginata, Haliday. 



1852. Idolothj-ips marffmata, Halidav in Walker, Homopt. Ins. Brit. 

 Mus. p. 1096. 



1852. Idolothrips spectrum, Haliday in Walker, Homopt. Ins. Brit. 

 Mus. p. 1097. 



1904. Idolothrips spectrum, Froggatt (with marginata ( 9 ) and lacer- 

 tina as synonyms), Proc. Linn. Soc. N.S.W. pt. 1, p. 54. 



I. marginata, being the first used, would seem to be the 

 name by which this species should be known. 



Idolothrips lacertina, Haliday. 



1852. Idolothrips lacertina, Haliday, I. c. p. 1097. 



1904. Idolothrips spectrum (in part), Froggatt, I. c. pt. 1, p. 54. 



The (J , apart from being noticeably much smaller and 

 more slender than the ^ of marginata^ widely and constantly 



