Annals of the Transvaal Museum. 
153 
aided by Mr. Janse, who lent me for study the whole of his fine series 
and permitted me to retain duplicates of several of the forms. I worked 
out — apart from dorsicristata Warr., which is well distinct, though probably 
a Neromia — eight potentially differentiable forms, according to the venation, 
abdominal crests, antennal and hindtibial structure, etc. ; ' but I sus- 
pected that some of the differences would prove inconstant, and therefore 
postponed publication of results. I am now satisfied that venation, crests, 
and strength and position of the white lines on the wings are all variable, 
though all show general tendencies that are helpful in conjunction with 
other characters. We are therefore left at present with only £ structural 
characters as absolute, but on the basis of these, with slight assistance 
from others, less stable, I have been able to establish a provisional scheme, 
which will be serviceable. I subjoin a brief analysis and shall then pro- 
ceed to describe the new forms * 
1. Hindtibia of £ dilated, with hair-pencil ; antenna 
distally mixed with reddish unilinea Warr. 
Hindtibia of not dilated ; antenna distally 
whitish 2. 
2. Antenna of £ with the joints projecting ; SC 1 of 
forewing generally beyond R 1 articulicornis, n. sp. 
Antenna of £ with the joints not projecting ; SC 1 
of forewmg before R 1 mulescripta Warr. 
It should be added that Warren’s type of approximans has lost the 
hindlegs, but it is probably a mere aberration of unilinea (or possibly of 
malescripta), the lines approximated, as is not very infrequent in the 
group, and indeed in the Geometridae in general. 
Neromia articulicornis , n. sp. (Pl. XXY, Fig. 4.1). 
cJ, 19-21 mm. ; 5, 22-25 mm. Face and palpus green, the latter 
in $ slightly longer than diameter of eye, in $ fully 1J or perhaps slightly 
over, the terminal joint about twice as long as in the Tongue well 
developed. Antennal joints in £ projecting, ciliation about as long as 
diameter of shaft ; scaled surface white, purer white at base. Snow- 
white fillet rather narrower than green crown. Thorax green. Abdomen 
dorsally pale green, the crests concolorous, inconspicuous. Legs mostly 
jpale green, foreleg partly reddish in front ; hindtibia in not dilated, 
hindtarsus about 2 mm. in length. Forewing with SC 1 stalked ; pale 
green (green powdered or somewhat strigulated with whitish-green) ; 
costal edge yellowish-white, at extreme base green ; lines white, slender, 
antemedian generally weak, not very strongly bent, postmedian variable 
in position, rather straight or slightly curved ; discal streak or lunule 
weak (green) or obsolete ; a vaguely pale terminal line ; fringe pale green. 
Hindwing with termen rather full, but not angled nor even noticeably 
bent at R 3 ; discal mark and postmedian line as on forewing, the line 
sometimes curved nearly parallel with termen. Under surface much paler 
(whitish) green, the postmedian line faintly discernible. 
Barberton, Transvaal, 26th December, 1910 (^ type) ; other examples 
^(both sexes), December, 1910- January, 1911. 
