SIR JOHN LUBBOCK ON THE THYSANURA. 29'. 



Fusiform; entirely grey, with a tinge of green; antenna 4 , legs, andsaltatory appendage 



somewhat paler than the rest of the body, which is very hairy. The upper surface 

 is thickly covered with clnbbed hairs. Eyes black. Sixth segment of the body as 

 long as the three or four preceding taken together. 



- 



Length fa of an inch. 



Under pieces of wood in winter ; not common. 



The second and third segments of the antennae are about equal in length, and BOOM 

 what shorter than the apical. The feet have a single tenent hair. 



Degeeria nicoletii, n. sp. (PI. XXII. fig. 19.) Yellow ; eyes on a black patch 



po 



of antenna tinted with violet ; a reddish-brown baud between the <-\ 



- 



two brown patches on the posterior end of the fourth abdominal segment, and a 

 band of the same colour on the posterior margin of the seventh. 



Length about Yt 0I> an inch. 



Common on bark and among grass in spring and summer. 



The antenna? are about three-fifths of the length of the body. The basal 

 rather shorter, and the apical rather longer, than the two middle ones, which are of 

 about the same length. Besides the short hairs pointing forwards, the three 1 al seg- 

 ments have a few rather longer ones, which stand out at right angles to the segment 



itself. 

 The brown band on the head between the eyes also projects a little behind them. 



The mandibles have respectively three and five rather blunt teeth 



first, th 



surface 



The body is somewhat thickly clothed with hairs, which are of three sorts 

 ordinary short hairs, which are spread pretty evenly over the whole 

 over the appendages; secondlv, longer clubbed hairs, as in PL XXII. fig .17; i iese 

 generally stand at right angles to the skin, and are characteristic of Dege, *a and lOrc?»>- 

 sella; they occur only on the body; thirdly, long, serrated hairs, most ol which he 

 along the body, but some of those at the posterior extremity, as well as a few scattered 

 ones on the legs, stand out at right angles. Lastly, there are on the fourth ab ommal 

 segment a few still longer, serrated hairs which have a curious bend in the middle as m 

 PL XXII. fig. 18; this bend is not accidental, as might at first be supposed, but , 



tEe two claws and one tenent hair; they are all six alike, and r smblethos, 

 of D. nigromaculata or Lepidocyrtus argentatus (see Linn. Trans, xxm. pi. oj. n . i;. 



Isotoma trifasciata, Bourlet. (PL XXII. figs. 20, 21.) 



Isotoma trifasciata, Bourlet, Mem. sur les Podurelles. 



bifasciata, Bourlet, ibid. 

 , Nicolet, Ann. Soo. En, de France, 2- s,V. v,, 7 . 



Greenish yellow, mottled with ^V^^^^\ M ^ „,,,,. 



wide an* continuous hands down the back . I nd, . ^ ^ ^ ^^ 



caudal appendage pale. Eyes on a Mack paten. x>a e 



rather shorter than the other three, which are subcqual. 



