2<)S SIR JOHN LUBBOCK ON THE THYSANURA. 



Purple ; antenna?, legs, and hairs pale yellow ; eyes on a black patch ; spring white. 



Abdomen with a reentering angle and scattered pale hairs. 

 II i i»h Elms, among grass. Common, May to July. 



Length 2V 0I " an incl1 - 



One mandible has five well-marked teeth ; the other can hardly be said to have any at all. 



The feet much resemble those of S. luteus ; there are two tenent hairs above, and 

 me on the underside. The larger claw is simple, the lesser one very small. 

 The saltatory appendage (PI. XXI. fig. 15) also much resembles that of S. luteus. 



Orciieski.la cincta, L. 



Podura cincta, Linn. Syst. Nat. ii. p. 1014. 



vaga, Linn. ibid. p. 1013. 



, Fab. Ent. Syst. ii. p. 66. 



cincta, Fab. ibid. p. 67. 



Orchesella filicornis, Templeton, Tr. Ent. Soc. i. p. 93. 



cincta, Templeton, ibid. p. 93. 



Ileterotoma vaga, Bourlet, Sur les Podurelles, Me'm. Soc. R. d. Lille, 1839, p. 398. 



cincta, Bourlet, Sur les Podurelles, ibid. p. 399. 



JEtheoscerus pulchricornis, Bourlet, Sur les Podurelles, Mem. Soc. B,. d. Douai, p. 



ductus, Bourlet, ibid. p. 23. 



Orchesella fastuosa, Nicolet, Sur les Podurelles, Mem. Soc. Helv. vi. p. 78. 



, Gervais, Apteres, iii. p. 414. 



filicornis, Gervais, ibid. p. 415. 



cincta, Gervais, ibid. p. 421. 



This common and pretty species varies very much in colour, and has been described 

 by different authors under a variety of names. In addition to the synonyms given 

 above, I have little doubt that some of the other supposed species of Orchesella will 

 eventually prove to be only the young of this. 



The third abdominal segment and the third segment of the antennae are black ; the 

 apical half of the second segment of the antennie, the posterior half of the second abdo- 

 minal segment, two patches on the mesothorax, and two spots on the posterior margin 

 of the fourth abdominal segment are white ; the two terminal segments of the antennae 

 are brown ; the rest of the body is mottled, and in different specimens may be found of 

 every hue between light reddish brown and deep black. 



Of course, in the black specimens the dark band on the third abdominal segment 

 ceases to be conspicuous, and the pale one on the second abdominal segment comes out 

 by contrast ; such specimens constitute the Podura vaga of Linnaeus and subsequent 

 authors. On the other hand, in pale specimens the dark band on the third abdominal 

 segment is the salient feature ; and these specimens form Linna3us's P. cincta. Tins 

 name seems to me the best of all those which have been given to the species, because in 

 all cases the transverse abdominal band is the distinctive characteristic of the species. 



Dkgeerla lanuginosa, Nicolet. (PL XXII. figs. 16-18.) 



Degeeria lanuginosa, Nicolet, Podurelles, p. 74. 



, Gervais, Apteres, p. 425. 



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