476 Notes on the Larva of Trocliilium andrenseforme. 



over itself another chamber, similar in construction to the 

 previous one, only longer and much narrower, its breadth 

 being made to coincide Avith that of the crack in the bark. 

 By 11 p.m. the indefatigable subject of these notes had 

 nearly completed its temporary domicile, and was almost 

 concealed from view, though it could be seen, through the 

 diminishing gap in the roof, to be still hard at work thereon. 

 This chamber, which appeared quite finished by 7 a.m. on 

 the following day (July 29th), and probably had been so 

 for several hours, was elliptical in shape, 9 mm. long, by 

 3 mm. wide across the middle, and became covered ex- 

 ternally with numerous frass-like pellets (mostly reddish- 

 brown, though some were quite ochreous) of gnawed inner 

 bark and wood, mixed with frass, which seems to vary in 

 colour from reddish-brown to blackish-brown. The larva 

 continued to feed in this same burrow, at any rate for the 

 next two or three weeks, as was evidenced by the frass 

 and pellets, which continued to be extruded through some 

 invisible opening in the walls of the chamber, the pellets 

 that could not adhere to these falling on the sand at the 

 bottom of the cage. But, at some time between the 

 middle of August and the latter part of October, it clearly 

 left this burrow, wandered a few inches dov/n the stem, 

 constructed an elliptical-oval, blister-like, chamber (about 

 10 mm. long, by 5'5 mm. wide across the middle) over 

 itself between the two Vilmrnum stems just where they 

 closely approached one another, its base being fixed to one 

 stem and its roof to the bark of the other, and bored 

 thence into the solid wood, in which it still (November 

 7th) remains lost to view. 



It seems obvious that the larva of T. andrencvforme 

 feeds throughout one year and through portions of two 

 others, that is, for the greater part of two years, for there 

 can be but little doubt that the individual under notice, 

 which must have been deposited as an egg about mid- 

 summer 1905, hatched out within the next month or two, 

 and that it will not be full-fed before the spring of next 

 year (1907). 



