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sued for a few moments. The antennae are setaceous aud raoniliform, but here and 

 there a joint occurs longer than its predecessor; the last joint is cylindrical, and more 

 than double the length of the preceding. The colour of the body is a deep reddish 

 brown. There are sixteen sternal segments which have a livid hue, and have the same 

 proportions and markings as those of Lithobius variegatus. The legs have an unva- 

 ried pale red colour, and are shorter and stouter than those of L. variegatus, but diifer 

 from the latter in no other respects. The labium is almost smooth and without punc- 

 tures. The palpi are approximate at the base; the first joint is short, the second and 

 third are pale yellow, the fourth joint is pale red, acuminated, and longer and more 

 slender than the third. The labium and jaws do not belong to the head, though they 

 cover a great part of its under surface aud hide the origin of the palpi ; they are easi- 

 ly raised, and found to be attached to the segment at their base, which forms a narrow 

 band above, behind the head, from which therefore these jaws and labium are quite 

 distinct, and rather belong to the prothorax. The palpi also are attached to this seg- 

 ment, as is more apparent in the genus Scolopendra. In front of them are the max- 

 illas, which are short, and have broad and obtuse tips fringed with short hairs ; next 

 come the mandibles, which are short and obtuse, and lastly the labium already de- 

 scribed. The dorsal segments are arranged like those of L. variegatus, except that 

 the 10th and I2th are broader and more developed. This species and L. variegatus 

 are at once seen to be distinct ; the body of the latter is slightly narrower than that 

 of the former, its legs are longer and more slender, and their bands, and the stripes on 

 the upper surface of the body, easily distinguish it. The labium of L. forficatus is 

 thickly punctured, that of L. laevilabrum is smooth ; the head also of the former is 

 punctured, and broader than that of the latter, which is smooth. In some of the early 

 stages of growth the antennae have only 22, 23, or 26 joints, and the legs are but 30 

 or 32 in number. 



Lith. variegatus. The antennte have 34 or 35 joints, they are semitransparent, pale 

 yellow at the base, but brighter and deeper in colour towards the tips. There are 16 

 locomotive or leg-bearing segments, and the sternum of each is pale yellow, and, be- 

 ginning at the head, is longer and broader than that which precedes it, but the two or 

 three last segments are narrower and smaller than those which they follow. Each 

 sternum is transverse, and bears three irregular longitudinal furrows, very indistinct 

 near the head, but increasing in depth and clearness even to the tail. The legs of the 

 first segment are altogether pale yellow and somewhat short, but in passing onward to 

 the last pair they become imperceptibly longer and banded with more and more dis- 

 tinct broad brown bands. A pair of legs is attached to the sides of the sternum of 

 each segment; they are composed of nine joints, and are sparingly clothed with short 

 stout hairs, the first joint is somewhat longer than broad, then follow two short trans- 

 verse joints, the fourth joint is longer than the first, the fifth is more slender but not 

 longer than the fourth, the sixth is longer and more slender than the fifth, the seventh 

 is still more slender but not quite so long as the sixth, the eighth is pale red, and is 

 still more slender and much shorter, the ninth or the claw is small and short. These 

 joints, except the first and the ninth, are armed with short stout spines, which increase 

 in number and size from the first successively to the fifteenth pair of legs, which are 

 at least double the length of the first pair, and are banded with five distinct dark brown 

 stripes. The motion of the legs when the insect is alarmed or irritated is very rapid ; 

 they are organs of prehension as well as of locomotion. I have seen this species fix 



