16 LECANOPSIS BREVICORNIS. 



very broad ; trochanter somewhat triangular, bearing 

 a rather long hair; femur, tibia, and tarsus about 

 equal in length, the latter being slightly the shortest ; 

 digitules to claw dilated and suddenly truncate, those 

 of the tarsi ordinary ; after maceration in potash the 

 antennas and legs are seen to be broadly margined with 

 dark brown chitin. Spiracles (fig. 5) very large, 

 equalling the length of the antennas, exterior portion 

 trumpet-shaped, the narrow extremity attached to the 

 centre of a very large reniform depression, which is 

 covered on one side with a group of spinnerets, and 

 outside the margin of the depression are several others, 

 larger, but of similar character ; three tracheal tubes 

 radiate from each of the four spiracles, but are united 

 at the point of attachment with the spiracle. Dermis 

 at the sides, above, with a band of circular spinnerets, 

 fewer in front, and absent at the posterior extremity. 



Long, 2'50-3*50 mm. ; wide, 1*50 mm. 



Ovisac. In what is apparently the adult stage, the 

 female encloses herself within a very thin shell of a 

 material resembling talc, which is irregularly cracked 

 all over ; the cracks are merely indicated by whitish 

 lines, there is no actual separation of the material. 



Habitat. On grass roots amongst sand and gravel ; 

 at Snettisham, King's Lynn, Norfolk, just above high- 

 water mark, where I first discovered it in July, 1895. 

 Mr. Dale also obtained specimens at Llandudno, North 

 Wales, in the following September ; and I have taken 

 a single example in the same locality. 



Distribution. Not known to occur outside the 

 British Isles. 



In my original diagnosis I described the species as 

 possessing seven-jointed antennas ; I now find that I 

 then mistook a constriction for a joint, which is very 

 easily done when one first takes up the study of this 

 group. The species may be recognised at once by the 

 curious glassy test which covers the body of the female, 

 by the short sub-rudimentary or atrophied legs and 

 antennae, and by the enormously developed spiracles. 



