AND OTHER INJURIOUS INSECTS OE ICJO"/ AND I908. 



161 



Fig. «!. Knd of frame 

 showing pxfavations in 

 wood made by Bee Moth, 

 Original. 



11 



The young larva, see Fig. 84, is pale flesh 

 color, with light brown head. Mr. George 

 Ainslie, employed in the insectary at the time 

 of these experiments, describes this stage as 

 follows : 



"Length, 1 mm. Width, 2 mm. Body 

 white. Head brownish with darker brown 

 sutures between eyes and clypeus. Head ob- 

 long, twice as wide as long, clypeus slightly 

 obtruded, V shaped from above, coming to 

 an apex just at posterior margin of head. 

 First thoracic segment largest of body, slight- 

 ly wider than head, and nearly same shape. 

 Anterior margin straight, and lateral ones con- 

 vex. Legs same color as body. Second and 

 third thoracic segments shorter than first and 

 nearly as wide. About twice as wide as long. 

 Abdominal segments 9. Lateral margins con- 

 vex. There is a small bristle on the outer ex- 

 tremity of each side of each segment. Last 

 two somewhat reduced in size. Posterior foot 

 bifid. While larva very transparent. The 

 alimentary canal is evident, usually being 

 filled with brownish matter. Larva very ac- 

 tive, moving alternately its thoracic legs and 

 posterior leg, thus moving in a hitching, jerk- 

 ing fashion." 



The adult larva is shown in Fig. 86. It is 

 grayish in color, with a brown head, and its 

 presence in a hive can be dected by the rag- 

 ged and eaten appearance of the comb, and 

 the silk which it spins wherever it goes, and 

 by its excrement. They become full grown 

 in about four weeks and are about one inch 

 long. Before, or during the process of spin- 

 ning their cocoons, they frecjuently hollow out 

 the inner surface of the hive or frame by 

 gnawing, directly under their cocoons, each 

 hollow or depression fitting the lower sur- 

 face of a cocoon ; Fig. 83 shows the appear- 

 ance of wood thus attacked. Within these 

 cocoons they transform to pupse. The pupa is 

 a rich brown about 12 mm. long, the head is 



