

300 SIR JOHN LUBBOCK ON THE THYSANURA. 



In damp situations, under fallen branches of trees, and among decaying leaves 

 throughout the year; common. 



Length ^ of an inch. 



Many specimens are pale, irregularly mottled with purplish- brown patches. In dark 

 ^pocimens, however, the purplish-brown colour usually occupies the greater part of the 

 back, and the yellowish-green portion is thus reduced to two more or less irregular 



bands, which, however, increase in size towards the posterior extremity of the body. 

 These specimens appear to me to form the type of Bourlet's I. bifasciata. He describes 

 1 he antennae, however, as " anneles de brun a leur sommet." On the other hand, in paL 

 specimens the dark areas are reduced, and, as the underside is pale, the dark portion 

 thus comes to form three bands, one in the centre of the back, and one on each side. 

 These specimens, I think, constitute Bourlet's /. trifasciata, which is characterized by 

 having three dark longitudinal bands on a greenish ground. I prefer this latter name 

 as being the most characteristic. 



This species is rather broader in proportion to its length than most of the others. 

 The head is shaped like a capital D, and, like the whole body, is clothed with short 

 hairs, many of which, on the head and thorax, are slightly longer than those of the abdo- 

 men. On the other hand, the posterior abdominal segments possess a few long setae, 

 which point backwards. 



The caudal appendage extends forwards beyond the base of the so-called gastric 



tube. It is sometimes quite pale, sometimes yellowish, almost approaching to orange in 

 colour. 



The antennae are four-jointed, and clothed with short hairs. The basal segment mea- 

 sures about T Jo of an inch in length ; the second and third segments are equal, and 



measure -^ each, while the terminal segment is somewhat longer, and reaches 18 

 length. 



The mandibles have respectively four and five teeth, and offer no special peculiarities. 



The legs are of moderate length, the posterior ones being, as usual, the longest, owing 

 ilmost entirely to the elongation of the femur and tibia. The whole leg is clothed 

 with the usual small hairs, mixed with a few larger ones ; there are no tenent hairs. 



The feet (PL XXII. fig. 21) of all the three pairs of legs are alike. The large claw 

 is simple and stout ; the second appendage is of irregular shape ; on the side which 

 is turned towards the large claw it projects considerably, and bears a small tooth. 

 The end is produced into a very fine thread-like point. 



LEPmocYRTrs ^neus, Nicolet. 



Cyphodeirus aneus, Nicolet, Podurelles, p. 66. 



Brazen metallic ; first and third segments of antennae short. Eyes black. Antenna? 



yellow at base, the rest brown. Hairs few ; the usual thick bunch on first body- 

 segment. Thorax gibbous, but not projecting. Head set on almost straight. Body 

 broadest in front, not ovate. 

 I found one specimen in December. 

 This species is compressed laterally, which, together with its colour and its power of 



