Minus. 55 



Origin. — (L 92.) Two capsule flies, one male and one female, were found among 

 the ofTspring of a concave female from stock. The capsule female mated to normal 

 brothers gave 24 capsule to 60 not-capsule offspring. Three capsule females from 

 this culture mated to confluent males gave 9 wild-type and 13 exaggerated confluent 

 flies of the type described above; 3 other capsule females mated to wild-type males 

 from stock gave only wild-type offspring (about 20). 



Minus (mi). 



Description. — Minus flies frequently lack one or more of the thoracic bristles, 

 particularly the scutellar or dorso-central bristles. Occasionally the effect may be 

 reversed, and one or more bristles may be doubled. The character is very inconstant 

 in appearance and seems to be affected greatly by environmental conditions. In 

 some cases nearly all the flies in the homozj'^gous stock will appear normal. The 

 character is a recessive. 



Origin. — (L 22.) Many flies from a stock carrying wax. 



