THE CANADIAN ENTOMOLOGIST 371 



of pale irregular blotches around the lateral scars. The dorsal 

 and lateral punctae are darker than the ground colour and there 

 are also diffuse darkened areas surrounding the mid-dorsal pale 

 spots on most of the segments. 



Length of body 41-45; mentum of labium 8.3-8.7; outer 

 wing-pad, 9.5-9.9; hind femur 7.7-8.3; ovipositor, 3.2-3.5; 

 width of head, 8.1-9; width of abdomen, 7.5-8.8. 



In addition to the mature nymphs and exuviae, we also found 

 a nymph of the penultimate stage, which was successfully brought 

 alive to Toronto and carried through the winter and spring until 

 the time of emergence. During the winter (December to April), 

 when it was kept in the cellar, upon a window-sill, it took no food, 

 but at other times it was very voracious, on one occasion, soon 

 after the long winter fast, feeding on a earthworm continuously 

 for four hours. It underwent the last larval month on June 8 

 and began to transform into the adult on July 27. Unfortunately 

 I was away from the city at this time and an accident prevented 

 the successful emergence of the imago. 



yEshna interrupta Walker. 

 The nymph described in my monograph as that of A . interrupta 

 was correctly referred to this species. A nymph of the same 

 kind, which I obtained at Banff, Alta., and kept for six weeks 

 at the Biological Station, Vancouver Island, commenced to emerge 

 during my homeward journey. The unfavourable conditions ol 

 travelling by rail were such that it failed to complete its trans- 

 formation, but remained alive within the exuvia long enough to 

 develop the colour-pattern quite distinctly. This is easily recog- 

 nizable as belonging to interrupta. The race found at Banff is 

 lineata varying towards interna. Mr. C. H. Kennedy- has also 

 taken a similar form of this species in transformation in Nevada 

 and California, and I have found numerous exuviae on Vancouver 

 Island under circustances in which all other species were excluded. 

 These exuviae are all identical, and it is quite evident that the 

 various races of this species do not differ from one another in the 

 early stages. It seem therefore certain that the two nymphs in 

 the Cabot collection, which I referred with considerable doubt 

 to A. interrupta lineata, do not belong to this species. It is prob- 

 able that they are somewhat atypical examples of A. eremita. 



