14 



Texas AGBicQLTUiLi.L Experiment Station 



empty combs for food. The average length of the larval period of this 

 brood was forty-nine days. 



Table 6. — Length of larval period, fall 1912. 



These larvae vs^ere kept in the laboratory at normal temperature, with 

 empty comb for food. The average length of the 'larval period of this 

 brood was thirty-five days. 



In the fall brood many of the larvae do not mature and pupate until 

 cold weather occurs and a few larvae feed throughout the winter. At 

 any time a comb was inspected there was a vast variation in the size 

 of the larvae from eggs deposited at the same time. 



Table 7. — Length of larval period, winter 1912. 13. 



These larvae were kept in the laboratory with normal artificial heat, 

 with empty comb as food. The average length of the larval period of 

 these was 110 days. 



Fo observations were made on the number of moults of the larvae. 



DESCKIPTION 



On September 15, 1913, ten specimens of mature larvae were meas- 

 ured and the average length was twenty millimeters. The head is 

 small and pointed, reddish brown in color, with a light v-shaped line 

 on top, this "v" opening towards the front of the head. The body is 

 larger than the head, long, cylindrical, smooth except for a few short 

 hairs. The general color is a dirty gray with the prothoracic shield 

 brown and having a broad band across it. 



PUPATION 



Having completed its growth, the larva seeks a place in which to 

 pupate, though sometimes the end of the feeding gallery may be en- 

 larged and closed to serve as a cocoon. The cocoon may also be spun 



