THE GENUS LEBERTIA. 497 



examined Neuman's type specimen and supplied what was 

 deficient in the original description. 



The species is distinguishable first of all by its small size, 

 which is variable and may range from about 0*8 mm. in length 

 to slightly over twice that size. The greatest breadth is a little 

 under that figure. As a rule the body is somewhat dorso- 

 ventrally compressed and varies from a broad oval to nearly 

 round. The anterior is without any weak marginal indent 

 rather bluntly rounded. The apical extremities of the first and 

 second pair of epimera extend only slightly beyond the body 

 margin. 



The colour may be a reddish brown or a }'ello\vish red with 

 large brown spots, with the excretory organ showing through as 

 a broad T- or Y-shaped strip on the dorsum. The epimera have 

 a tinge of blue or green. The palpi and legs may also have these 

 colours or even a bright red, but in these appendages the 

 colours are fairly transparent. 



Beyond being thinner, the skin is similar to that of porosa. 

 The capitulum also resembles that of porosa, but it is 

 decidedly smaller. The tapered anterior processes are of 

 moderate length and do not spread out very much laterally. 

 While the mandible closely resembles that of the allied species, 

 it is also more symmetrical in its build. The posterior portion 

 is weakly sinuate with the extremity sharply turned up. The 

 pharynx, like the mandible, is also more symmetrical. 



The palpi appear to have some latitude in regard to their 

 length, as the extremes of 0'30 mm. and 0*48 mm. have been 

 recorded. The Irish specimens are even larger, viz. 0'52 mm. 

 The second segment has five or six bristles on the extensor surface, 

 while the characteristic bristle on the flexor surface is short, and 

 though it is distinctly back from the distal extremity of the seg- 

 ment, it is not so much as is to be noted in, say porosa or obscura. 

 The third segment has five long finely pectinate bristles on the 

 inner side. Three of these are close to the extensor edge. The 

 proximal and distal ones each stand slightly back from their 

 respective ends of the segment, while the middle one is more on 

 the edge than the other two. The remaining two stand close 

 together distally almost at the flexor edge. This feature rather 

 marks out insignis from other species of the sub-genus. While 

 the middle one of the three distal bristles is typically towards the 



