THE CANADIAN EN'JOMOLOGIST. 93 



there is no development of the plate IVa, at the upper corner of 

 the spiracle, as occurs with some other species. In the penultimate stage, 

 conditions are similar, the salient features of comparative value being the 

 absence of a continuous dorsal line and of IVa on joint ten. It is by 

 these points separable from purpurifascia, which it so closely per.=;onifies 

 at first glance. The large dorsal plates preceding the anal one are well 

 divided by the dorsal line ; in some other species these plates become 

 confluent. .\t maturity the length is 39 mm.; head nearly 2 mm. wide. 

 The colour does not fade to translucence entirely, but retains a distinct 

 sienna shading. Pupation occurs about the first week in August. The 

 chrysalis offers no distinguishing point. Being formed outside the burrow, 

 there is not the extreme cylindrical shape caused by a narrow aperture. 

 It is of a paler colour than usual, of slender proportions, very active, and 

 measures 20-22 mm. The species seems rather a small one, though, 

 given a larger food-plant, we might expect better developments. 

 Sarracenia is an odd plant to have been selected by a boring larva of the 

 size of the species under consideration. There beijig scarcely any stalk, 

 the larva must needs use the root, and here the supply is rarely enough in 

 one plant for attaining maturity. Workings do not extend to the pitchers 

 in any way, for though one young larva was observed to enter the plant by 

 the pitcher's tube, it is not likely this is the usual channel, since they so 

 often contain more or less water. The little Exyria larvaj can easily 

 mount the pitcher's side and keep above any water as occasion requires. 

 Indeed, it seems surprising that some insects are immune to these 

 dangers, where so many others have fallen. The remains of quantities of 

 entrapped insects are to be found in the pitcher's neck, being consumed 

 by the acids there secreted. Here is sure to flourish the slug-like maggot 

 of the Sarcophaga fly. A little further up an Exyria may have its abode. 

 Down in the root appassionata may be seeking the seclusion which has 

 stood it in such good stead for so long. An anomaly is surely presented : 

 this insectivorous plant now harmless and furnishing food for those insects 

 that have grown wise in their own and succeeding generations. 



Though not having personally viewed Harvey's type, the determina- 

 tion of the Sarracenia species is due in a measure to courtesies extended. 

 While the application of the description may be entirely satisfactory, and 

 the aid of coloured drawings has appeared to settle any reasonable doubts, 

 we must still bear in mind that species run very close in this genus at 

 times, and a single example, as in the case of this particular type, does not 



