72 THE CANADIAN ENTOMOLOGIST 



and more of a pinkish hue, the cream-coloured lines hold their 

 prominence, the subspiracular strong on thoracic joints; tubercles 

 the same. 



Maturity. — An exceedingly cylindrical larva of small diameter; 

 the colour fades to a yellowish translucence, the demarkation of 

 the lines is lost. Thoracic and anal plate of usual proportions, 

 the former edged with black; tubercles have deteriorated in size, 

 except on joint eleven I and II are the merest dots, IV holds its 

 prominence, on ten IVa is sometimes wanting, but III and Ilia 

 usually coalesce, on eleven their union is more clear. Setae are 

 weak and unnoticed without a lens. Larval length for the above 

 stages: 24, 28, 31, 39 mm., respectively. General dates for pupation 

 are August 12 to 18; for emergence, September 5 to 20. 



The pupa is small and slender, light brown and shining, the 

 white spots easily seen when about ready to disclose the moth; 

 the cremaster is two fine spines curved at the point. Length 15 

 to 18 mm. 



Lysimachice larva? differ from purpurifascia in the character 

 of the dorsal line, the size and colour of the body, while the tu- 

 bercles of the latter are larger and black. The dorsal stripe is a 

 larval character in the genus offering ready aid in differentiating 

 certain sections. This line may be broken abruptly on the first 

 four abdominal segments; it may cross this as a mere thread, or it 

 may be a broad even stripe in its entirety. The Loosestrife borer 

 is of the latter class, while purpurifascia has a narrow, thread-like 

 line, indistinct and reduced on the joints in question especially in 

 the earlier stages. They differ more autopically than the larvae 

 of such dissimilar species in the moth state, as necopina and harrisii. 

 Throughout the month of June particularly the browned foliage 

 of the Loosestrife here and there point out the presence of this 

 larva where a stem has been bored, and died. It is always the 

 upland, whorled, or four-leaved species, quadrifolia, that is selected 

 by this larva, L. terrestris, a frequenter of wet places not being 

 infested, though its stem would be more commodious. The latter 

 is often bored by a straggling cataphracta or marginidens, but my 

 experience is negative as concerns lysimachice. The former is very 

 persistent, its running rootstocks often matting an area to the 

 exclusion of other plants. The even whorled foliage massed in 

 clumps quickly catches the eye, and forms a background on which 



