2(>4 



■r\c,i-: sMKisiiKiiO 



iMght-i()iiiti-(l. Till' |ii(i|uiil imi lictwccii tlii' joints shows sonic. tlioULili ullici insiLiiiili( Miit 

 variiitidn; is iilnmt as follows: 



l.» * - > 



(I.;); 



in otluT woimIs ;il)oiit the s;mit' as in pi. II.. lii^. .">. 'I'll. Sidii. litl'-' li. The end joint is often 

 siinunvhat witliilnwvn iitto tin' seventh joint and rather iliffnnlt to \erilv with certainty; it 

 is best seen from the lateral side; it is moved liv special intiscles. The anterior hiistle of the 

 third joint is situated somewhat pio.xinially of the middle of the joint. This luistle. the 

 posterior bristle of this joint, the two bristles of the fourth joint, the luistle of the si.xtli joint, 

 and the a-bristle of the seventh joint are most frecjueiitly subecjual or rather slightly different 

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

 extent: all the.se bristles are bare or have short hairs. The sensory bristle of the fifth joint is 

 rather long, attaining to about the length of the posterior side of the second to the eighth or 

 the third to the eighth joint. TIk^ 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 most cases somewhat different in length from each other and somewliat .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 below. 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 long, their length varying 

 to some extent, tlie 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 the next distal one there is a decided gap, which does not exist between the others. The 



