284 



[November, 



spicuous cases of ccBspititiella that crowd the plants at the same time. 



Doubtless it will turn up in many places, though both Mr. Fletcher 



and Mr. Bankes, to whom I sent specimens of the case last year, failed 



to find it in their parts of the country. 



Following the practice pursued in the first portion of these notes, 



I will now give a figure of the ven- 

 tral plate of the 8th segment in the 

 female ; and, at the same time 

 through the kindness of Messrs. 

 Bankes and Fletcher, w^ho supplied 

 me most liberally with material, I 

 am able to complete this part of 

 the subject, by adding also repre- 

 sentations of the parts in adjimctella 

 and obtusella, the two seaside mem- 

 bers of the group. Lettered on the 

 same plan as before, but few words 

 c. agrammeiia. of explanation are needed. All 



three, it will be noticed, differ widely amongst themselves, and equally 



so from the five figured first. In agrammeiia the difference is even 



greater than 



at first sight 



appears, for 



the outer 



portion (b) 



of the geni- 

 tal canal is 



internal to 



the plate, to 



the inner 



surface of 



which it is 



attached, 



and it opens C. adjunctella. 



externally just within the outer edge of the plate ; consequently, the 

 genital aperture lies behind the plate, just inside its edge. In adjunc- 

 tella the arrangement holds an intermediate position. The outer 

 portion (b) of the canal lies at first on the inside of the plate, it then 

 pierces the plate nearly in its middle, and over the opening is thrown 

 the strong chitinous hoop which is so striking a feature in the genitalia. 

 I may add, that the distinction between the outer and inner portions 



C. obtusella. 



