250 BOPYRIDA. 
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-seginented 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 antennz 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 sete. Both 
pairs of antennz consist of three small joints; they are 
minute, and somewhat conical in generalform. 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 were obtained from Shetland in 1864, 
collected by the Rev. A. M. Norman. 
