I. \TROI 'IOLOGY. 



.dal end of it fhia insect, on account of 



the minute, shining .-. ith which its body id clothed, is known 



ic tish-moth. And it is the most familiar representative of the 

 HUM. Otlu cur beneath the bark of dc, 



1 in similar situations. The caudal end of the abdomen 

 irnished with slender bristle-like appendages. Tl 

 suggest the popular name Bristle-tails applied to the sub-order 

 le. 



The bo 4s of the head, three thoracic and ten well-marked 



abdominal segments. The antcnn.e are large, many-jointed, some- 

 tinii r than the body, and generally tapering towards the end. 



The most remarkable character presented by this 

 order i s of sub-abdominal append, i 



are well shown in Machilis (see Fig. 59). Similar ap- 

 pendages are attached to the coxae of the second and 

 third pairs of thoracic legs. These abdominal appen- 

 gardcd as rudimentary legs. \Ve have- 

 therefore, a condition approaching that exhibited 

 by Scolopendrella. 



The Cinura (Thysanura of Lubbock) is divided into 

 three families. These can be distinguished as follows: 



A. Body not clothed with scales. 



B. Caudal appendages unsegmented, 

 horny and pincer-like. 



I. JAPYGID^:. 



RB. Caudal appendages nuiny-jointed 

 and thread-like. 



II. CAMPODKIIt.K. 



A A. Body clothed witi. 



III. Lr.i'is.Mii'.i-:. 



:nily I. JAI'V(-II)J-:. The most obvious char- 

 acter of this family is presented b\- the caudal 



:nble those of ran 



in the form of horn 1'hc body is 



tlu-d with wanting. The 



palpi are -hort ; and th [ the ab- 



nearly equal width. The sub-abdominal appcn 



by groups of hai: 

 Only a .Jnpy.\\ has been described. .A//M'.r subt 



.1 the mouth of a small grotto near the 



:iily II. ('.\Mi'()i)f:ii)/K. This family resembles the prcced- 



Fic. 59. Ventral 

 aspect 

 chilis 

 appendage*. 



