250 BOPYRULE. 



Canada balsam, and it is not impossible that they have 

 been somewhat distorted, and which also precludes our 

 examining them satisfactorily. 



The male (represented on the left hand of our woodcut 

 of this species) has the segments of the body very dis- 

 tinct and rounded at their sides, the posterior lateral 

 angles of each being rather more rounded off than the 

 anterior angles; the six-segmented tail is narrower than the 

 hinder segments of the body ; its segments are, however, 

 equally distinct and rounded at the sides, truncated at 

 the hinder margin, the terminal segment being transverse, 

 with the sides rounded, and the extremity truncated. 

 The legs are strong and hooked ; when folded in their 

 ordinary position, they nearly cover the underside of the 

 body. The first pair of antennae are three-jointed and 

 setigerous at the tip, whilst the second pair are five- 

 jointed, the terminal joint being very minute. The small 

 conical mouth appears to be protected on each side by 

 a minute two-jointed footjaw. 



The female is broadly-ovate, with the ovigerous scales 

 rather narrow and fringed with a few minute setse. Both 

 pairs of antennae consist of three small joints ; they are 

 minute, and somewhat conical in general form. The legs 

 are longer, and comparatively not so strong as those of 

 the male. The mouth is represented as it appears in our 

 prepared specimen in the lower figure of our woodcut. 

 The tail is nearly triangular in form ; it is furnished at 

 the sides and beneath with elongate-conic fleshy appen- 

 dages, the precise number and distribution of which we 

 are unfortunately unable to describe, but suppose that 

 there are two pairs to each of the six segments. 



Our specimens w r ere obtained from Shetland in 1864, 

 collected by the Rev. A. M. Norman. 



