320 Falconer : The Spiders of Wicken, Cambridge. 



and more discontinuous, the lines in consequence much 

 less conspicuous. Similar patches occupy the sides, and 

 much smaller, more scattered ones the ventral surface. 



EPIGYNE a yellow brown plate, as wide as long, with a large 

 round, whitish coloured depression, having in its hinder 

 half two slender, reddish curved striae converging back- 

 wards. SpermatheccB at fore external angles, round, con- 

 tinued backwards by a curved tubular duct of nearly 

 uniform width and only very slightly oblique. Fig. 4. 



The females from which the above description was taken 

 had just become adult, and it is possible that greater age 

 might bring a somewhat increased deposit of pigment. 



Z. letifera is closely allied to the commoner and more 

 generally distributed Z. spinimana Sund. It is, however, a 

 paler coloured, less richly marked, and for its size more slen- 

 derly built spider. In the males of the two species, there are 

 in addition, well-marked differences in the palpi. In Z. spini- 

 mana Sund (figs. 5 to 7), the tarse and palpal organs are on a 

 larger scale ; the tibia is much stouter and shorter, and has a 

 differently formed apophysis (marked a) ; the apical process 

 of the palpal bulb (marked d) is longer, much slenderer, less 

 sinuous laterally, and more gradually acuminate at the end. 

 In the female of the same species, the formation of the epigyne 

 is dissimilar, the central depression being smaller, and more ill- 

 defined, the rounded head of the anterior spermathecae smaller, 

 and the tubuler dnct larger, widening more or less pos- 

 teriorly, and more obliquely placed. Fig. 8. The dispor- 

 portion in bulk between the two divisions of the body is much 

 less ; both also wider in proportion to their length. The facies 

 too, is quite different : the e5^es are larger, less unequal, 

 more strongly elevated, and the centrals of both rows much 

 the same size ; the ocular area is more vertical, and the middle 

 part of it clothed with long yellowish white pubescence which 

 is wanting in the new species. 



Maso gallica Sim. Les Arachnides de France. Tome 5, 

 part 3, p. 862, sub. M. sundevalli Westr. 



Amongst British spiders, the two species of Maso at present 

 recorded for this country may be very easily differentiated by 

 (i) their small size ; (2) the two rows of long slender divergent 

 spines beneath the tibiae and metatarsi of legs I. and II. 

 (longer and stouter in the female) ; (3) the leg tarsi much 

 shorter than the metatarsi ; (4) the broadly truncated front 

 of the cephalothorax ; (5) the lateral eyes set on strong pro- 

 minences ; and (6) the absence in the male of any cephalic 

 lobe or elevation and of postocular impressions. 



The genus recognised, the characters most to be relied upon 



Naturalist, 



