﻿VARIATION OF AGROTIS TRITICI AND A. CURSORIA. 147 



to tabulate the variation of transverse and longitudinal markings, 

 as under : — 



A. — Transverse lines distinct. 



Section I. — Subcostal longitudinal streak more or less well defined. 



Group 1. Streak white 5 tritici. 1 cursoria.* 



» 2. „ grey 3 „ 3 



„ 3. ,, ochreous 1 „ 1 „ 



Section II. — Subcostal longitudinal streak ill defined. 



Group 4. Streak suffused 4 tritici. A cursoria. 



„ 5. „ represented by a basal dash only. G „ 4 „ 



Section III. — Subcostal longitudinal streak absent. 

 Group 6. An angulated band-like transverse shade 



passing between the stigmata 3 tritici. 5 cursoria. f 



„ 7. Without band-like shade 2 „ 2 „ 



B. — Transverse lines evanescent. 

 Section I. — Subcostal longitudinal streak fairly well defined. 



Group 8. Streak white 1 tritici. 1 cursoria. 



„ 9. „ ochreous grey 2 „ 



Section II. — Subcostal longitudinal streak ill defined. 



Group 10. Streak suffused 3 tritici. 4 cursoria. 



„ 11. „ represented by a pale basaldash. 3 ,, 



Section III. — Subcostal longitudinal streak absent. 

 Group 12. Traces of a transverse band-like shade. 1 tritici. 1 cursoria. 

 „ 13. No trace of transverse shade 2 „ 2 „ 



Besides the aberrations adverted to in the foregoing tables, 

 there are several others which it is not possible to group or 

 tabulate in a satisfactory manner ; but some reference must be 

 made to variation of the stigmata. In both species the reniform 

 and orbicular stigmata are usually outlined in white, whitish, or 

 pale brown, and filled up with the ground colour. All the 

 examples of tritici have the lower fourth of reniform dark, but 

 seldom so black and conspicuous as it is in the majority of 

 the specimens of cursoria. The space between the stigmata is 

 generally darker in tritici than cursoria. 



In the last-named species there appears to be greater diversity 

 in the colour of stigmata : two specimens have both reniform and 

 orbicular entirely white ; two have these stigmata narrowly out- 

 lined in white, and filled up with black ; whilst two others, with 

 fairly distinct transverse discal lines, have but the faintest 

 possible trace of any stigmata whatever. Several specimens have 

 the orbicular more or less completely eliminated, and the reni- 



* The specimens figured belong to group 1. 



I Two specimens of cursoria in group 5 have the transverse shade more or less 

 cleai I v defined, 



M 2 



