IN THE BRITISH ISLANDS. 93 



band, and the right side without the > < -like mark, but with an equally 

 well-developed band. 



To make the system of subdivision more intelligible, I have drawn 

 out the following table : 



A. Ground colour : Whitish grey, grey, or yellowish grey. 

 I. Unicolorous form. 



1. Without f a. With whitish reniform = grisea-albo. \ = v. mode- 

 HH-like mark. \ b. With ochreous reniform = grisea-flavo. j rata, Ev. ? 



II. Reticulated form. 



1. Without f a. With whitish reniform = reticulata-albo. 

 HH-like mark. ( b. With ochreous reniform = reticulataflavo. 



2. With HH- J a. With whitish reniform =\secalina (var. y.), Haw. 

 like mark. \ b. With ochreous reniform =secalina-flavo. 



III. Central-banded form. 



1. Without ( a. With whitish reniform = virgata. 

 \ 6, 



mark. \ 6, With ochreous reniform = virgata-flavo. 

 2. With HH- ( a. With whitish reniform = I. niger-albo. 

 like-mark. \ b. With ochreous reniform = I. niger, Haw. 



IV. Dark costal form. 



1. Without HH- f a. With whitish reniform = oculea, Gn. 

 like mark. \ b. With ochreous reniform = oculea-flavo. 



B. Ground colour : Ferruginous red, reddish brown, or purplish 



brown. 



I. Unicolorous form. 



1. Without HH- (a. With whitish reniform = rufa-albo. 

 like mark. (b. With ochreous reniform = rufa-ftavo. 



II. Eeticulated form. 



1. Without HH- (a. With whitish reniform = nictitans, Esp., Hb. 

 like mark. \b. With ochreous reniform = secalina, Hb. 



2. With HH-like 1 a. With whitish reniform = nictitans -linea. 



mark. (b. With ochreous reniform = secalina-linea. 



III. Central-banded form. 



1. Without HH- (a. With whitish reniform = rava, Haw. 

 like mark. (b. With ochreous reniform = rava-flavo. 



2. With HH-like (a. With whitish reniform = didyma, Esp. 



mark. \b. W T ith ochreous reniform = didyma- flavo. 



IV. Dark costal form. 



1. Without HH- (a. With whitish reniform = furca, Haw. 

 like mark. (b. With ochreous reniform = furca-flavo. 



C. Ground colour : Black. 



I. Unicolorous form. 



1. Without HH- (a. With whitish reniform = nigra-albo. 

 like mark. {b. With ochreous reniform = nigra-flavo. 

 II. Eeticulated form. 



1. Without HH- {a. With whitish reniform = lugens, Haw. 



like mark. \b. With ochreous reniform = lugens- fluvo. 



2. With HH-like (a. With whitish reniform = albistigma. 



mark. (b. With ochreous reniform = leucostigma, Esp. 



