292 



IMay. 



In the medial area are contained three stigmata (similar to those 

 observable in the N'octuce), which are here correspondingly spoken of 

 as the orbicular (cut A, 6), claviform (cut A, 7), and reniform (cut A, 8) ; 

 and we shall find that the disposition of the two former in relation to 

 tbe first line will enable us readily to separate the species into groups ; 

 thus : — 



I. Both orbicular and claviform 

 stigmata attached to first line (cuts 

 A and C). 



II. Orbicular attached, claviform 

 detached (cuts B and E). 



III. Neither orbicular nor clavi- 

 form attached (Plate fig. 16). 



IV. Orbicular detached, claviform 

 attached (cut Fj. 



In the next place the form of 

 these two stigmata themselves will 

 help us to a further subdivision ; 

 for instance, in group I. 



a. Orbicular and claviform both 

 linear (pi. fig. 1). 



h. Orbicular and claviform both 

 open (cut C). 



c. Orbicular open, or partially so, 

 claviform dash-like (cut A). 



d. Orbicular and claviform in- 

 distinct, owing to shading beyond 

 first line (pi. fig. 11). 



Similarly group II. 



e. Claviform dot-like (cut E). 

 /. Claviform dash-like (cut B). 



Again in group III. 



g. Both orbicular and claviform dot-like (pi. fig. 9).* 



h. Orbicular open, claviform dot- like (pi. fig. 15). 



i. Claviform dash-like (pi. fig. 16). 



And again in group lY. 



k. Orbicular dot-like (pi. fig. 18). 

 I. Orbicular open (cut F). 



Of these sub-divisions 7 represent single species, viz., I a = pallida. 



^ This species is misplaced in the plate. The numerous dark scales beyond the first line originally 

 led me to include it in the fourth subdivision— Group I, but I now see that both its stigmata are dis- 

 tinctW detached from thi' tirst line.— H. G. K. 



