590 MR. LUBBOCK ON THE THYSANURA. 



situated, as usual, on a black ground ; and near the central line, a little in front of the 

 antenna, is a black double spot, which looks like the seat of two ocelli. At the same 

 time I did not obtain by dissection any further evidence that these spots were really in 

 any way connected with vision. 



The two claws are simple, but they differ in form (PL LIX. fig. 2) from those of any 

 other species which I have examined. The feet also are provided (perhaps to make up 

 for the simplicity of the claws) with four or five tenent hairs. 



The saltatory appendage is somewhat like that of S. JBitskii, but less hairy, being 

 indeed almost naked ; the terminal lamellte, however (PI. LIX. fig. 3), are different in 

 form. There are no tenent hairs. 



I at first supposed that these specimens might be the young of some already described 

 species ; but I have never found any larger ones, and they differ in form as well as in 

 colour from all the other representatives of the genus. 



Smtnthubus puscus, Lat. This species, which is probably the same as that mentioned 

 by Templeton under the name of S. ater, is the only one hitherto recorded as occur- 

 ring in England (Sam. Ent. Compend., p. 141). 



PODUMD^. 



This family comprises those species of the old genus Poclura, in which the mouth has 

 mandibles, and the body is elongated, with a more or less developed saltatory appendage 

 at the posterior extremity. 



Before proceeding to describe the species which have come under my notice, it may 

 be convenient that I should give a short description of the genera into which they are 

 distributed. 



1. Orchesella, Templeton. Segments of the body unequal in size, more or less thickly 



clothed by clubbed hairs. Antennae long, six-jointed. Eyes six in number on each 

 side, arranged in the form of an S. 

 The structure of the antennge makes this genus very easy to recognize. 



2. Degeebia, Nicolet. Segments of the body unequal in size, more or less thickly 



clothed by clubbed hairs, and sometimes also provided with scales. Antennae 

 longer than the head and thorax, filiform, four-jointed. Eyes eight in number, on 

 each side of the head. 



3. Templetonia, n. g. Segments of the body subequal, clothed by clubbed hairs, and 



provided with scales. Antennae longer than the head and thorax, five-jointed, with 

 a small basal segment, and with the terminal portion ringed. 



4. IsoTOMA, Bourlet {Desoria, Nicolet). Eour anterior abdominal segments subequal, 



two posterior small ; body clothed with simple hairs, and without scales. Antennae 

 four-jointed, longer than the head ; segments subequal. Eyes seven in number 

 on each side, arranged in the form of an S. 



5. Macrotoma, Bourlet {Tomocerns, Nicolet). Abdominal segments unequal, with 



