;204 

 eight-joint I 



TAOE SK(>('.si;l'.li(i 



ri'd. Tlic |)!'(i|)()rtiiin hctwccn tii<> joints shows some, tlioujiii ratlicf iiisignihcant 

 N'ariatiop. ; is about as lollows: 



I 



11 ^; III ''; IV I; V %; VI '; VII 



VIII 0,5; 



in other words about the same as in pi. II.. fig. 5, Tfl. ScOTT, 1912 b. The eml joint is ot'teti 

 somewhat withdrawal into the seventh joint and rather difficult to verily with certainty; it 

 is best seen from the lateral side; it is moved by special muscles. The anterior bristle of the 

 third joint is situated somewhat j^roxinially of the middle of tlie joint. This bristle, the 

 posterior bristle of this joint, the two bristles of the fourth joint, the bristle of the sixth joint, 

 and the a-bristle of the seventh joint are most frequently subequal or rather slightly different 

 from each other in length, about as long as the third joint; the length varies, however, to some 

 extent; all these bristles are bare oi' have .short hairs. The sensory bristle of the fifth joint is 

 rather h)ng. attaining to about tlie length of the posterior side of the second to the eighth or 

 the tliird to the eighth joint. The b-bristle about as long as the anterior side of the third and fourth 

 joints. The c-bristle attains about the same length as the whole antenna. The d- and e-bristles 

 are in inost cases somewhat different in length from each other and somewhat shorter or longer 

 than the b-bristle. The g-bristle attains about half the length of the shell, the f-bristle is 

 somewhat shorter. The number of filaments on the sensory bristle of the fifth joint and on 

 the distal bristles varies somewhat, as is shown in the table lielow. The lengths in this table are 

 the averages of the right and left first antenna; in most cases, however, the right and left 

 bristles were quite the same length; the difference was never great. 



The filaments on the sensorial bristle of the fifth joint are rather loim, their leiioth varvine 

 to some extent, the longest being about a quarter of the whole length of the bristle; the distal 

 one is rather short; they are all narrow, cylindrical, naked: between the short distal filament 

 and tfie next distal oin' there is a decided gap, which does not exist between the others. The 



