214 



THE CANADIAN ENTOMOLOGIST 



The close correspondence in the number of antennal seg- 

 ments occurring in aiemaleGrylloblatta and a iemale Embia is most 

 striking. In the female Embia which I was able to examine, through 

 the generosity of Major Imms, twenty-seven antennal segments 



w V nr r 



' Fig. 9. — Lateral views of left antenna of (1) Embia major Imms, (2) Grylloblatta campodei- 

 formis Walker. 



occur (Fig. 9, 1), and in the female Grylloblatta, kindly loaned 

 me by Dr. Walker, twenty-eight antennal segments occur (Fig. 

 9, 2). Imms, 1913, records a maximum of twenty-nine antennal 

 segments for females of Embia major Imms; while Walker, 1914, 

 records exactly the same number of segments (namely tiventy- 

 nine) as the maximum for females of Grylloblatta campodeiformis, 

 Walk., thus showing an astonishingly close agreement in the num- 

 ber of antennal segments occurring in the two groups of insects. 

 Indeed, there is a greater variation in the number of antennal seg- 

 ments among insects belonging to the same order, or even family, 

 elsewhere in the lower Pterygota, and, coupled with other ana- 

 tomical features no less striking, this clearly points to a remarkably 

 close relationship between the Embiids and Grylloblattids. 



