TAKSAL CHEMORECEPTORS OF BUTTERFLIES 



2. Conclusions 



193 



1. While the exact location of the tarsal chemoreceptors 

 is not yet determined, it is clear, from a study of the normal 



Fig. 6 Photograph of the same specimen of Pyrameis as shown in figures 4 

 and 5, showing the jDroboscis, p, completely extended as a result of contact be- 

 tween the left hind tarsus and a cotton swab saturated with a 1 M saccharose solu- 

 tion. The detail of the photograph is not sufficient to bring out the left hind leg, 

 but the other three walking legs are clearly visible in contact with the substrate. 

 This photograph has been slightly I'etouched in order to bring out more clearly 

 parts which were not quite in focus or which, because of their light color, did not 

 show distinctly. 



position of the leg, that these organs must be present in that 

 part of the tarsus constituted by the distal end of the proximal 

 segment and the four distal segments. 



2. The conclusion stated above, viz., that in Pyrameis, the 

 removal of the antennae, the labial palpi, and the rudimentary 



