214 



TEE AMERICAN NATURALIST 



[Vol. LVI 



Desceiption and Oeigin^ of Mutant Chakactees 

 Stubhy [sy) 



Description. — Stubby is a bristle character, manifested 

 by all of the thoracic and head bristles (Fig. 2). These 

 are usually shortened, thickened, and somewhat curled, 

 and often are split or forked at the tip. The two pos- 

 terior scutellar bristles are frequently tightly twisted to- 

 gether and point anteriorly. The short, thick appearance 



lof the bristles is never apparent in combination with 

 small-bristle, but the character can always be distin- 

 fruished by the forking of the sternopleural bristles. Both 

 sexes are fertile. Stubby looks very much like forked in 

 wela nog aster. 



Origin.— ,One stubby male was obtained from a pair 

 inatins:. No eomi)lete record of this culture was kept, 

 liowcvor, and it is not known whether others appeared 



