PIERIN^.. 
^3 
and New Worlds, are further ornamented by a black stripe along the 
inner margin of tlie fore-wings (like tlie corresponding marking so 
prevalent in many females and some males of the genus Teracolus), 
and in the pretty American group represented by T. Delia and T. 
Elathca, Cram., this stripe is in the $ edged with orange on the 
inner margin itself. 
These insects are for the most part of weak flight, and keep near 
the herbage, but those of them that are more partial to open ground 
are moderately active on the wing, and have the Pierine habit of flying 
onward instead of keeping about one spot. Doubleday (op. cit., p. 78) 
observes that T. Mcippe (Cram.) — which in colouring and pattern 
strongly resembles one of the deeper-tinted species of Golias — in the 
United States flew abundantly in clover-fields in company with Col. 
Philodice and Col. {Mcganostoma) Coesonia, and that in flight it was 
more like those swift butterflies than its own congeners. 
The South- African forms are all yellow, with more or less developed 
black borders ; the males having the ground-colour bright gamboge 
or chrome and the border deep black, while the females are of a paler, 
more sulphur tint, with the border more dusky. Three groups are 
typically represented by Terias Brigitta (Cram.), T. floricola^ Boisd., 
and T. Besjardinsii, Boisd. : with the first is associated T. Zoe, Hopff*. ; 
with the second T. JEtJdopica, mihi ( = Scnegalensis, Geyer, nec Boisd.), 
and T. Bidleri, mihi ; and with the third T. rcgularis, Butl. 
The Brigitta group has the fore- wing border very broad, and the 
hind-wing one much narrower, or even (in the ^) reduced to small 
nervular spots ; the upper side of the $ is more or less irrorated basally 
with fuscous scales : the under side of both sexes is also faintly irrorated, 
the hind- wing being feebly marked with some transverse dusky streaks. 
The Floricola group (not separable from the Indian T. Hecahe 
(Linn.), group) has the fore-wing border broad or very broad hind-mar- 
ginally and more or less deeply bi-excavated or bi-sinuated on its inner 
edge, and the hind-wing border very narrow, or represented only by 
small spots or even dots ; the upper side of the $ is not irrorated ; the 
under side of both sexes is free from irroration, and its markings 
usually much more distinct, dentated irregularly, and ferruginous, 
there being commonly a conspicuous patch of the latter colour close to 
the apex of the fore-wings. 
The Besjardinsii group has the fore-wing border moderately broad, 
narrow, or very narrow, with its inner edge more as in the Brigitta 
group, and the hind- wing border varying from narrow to purely macu- 
lar ; the under-side markings are intermediate in character between 
those of the two foregoing groups respectively ; the hind- wings are 
bluntly angulated at extremity of second median nervule.-^ 
^ The allied forms from Central and South America separated from Terias by Mr. Butler 
in 1870, under the generic title of Sphcenogona, present a sharp angle or even prominent 
caudate projection at the same point of the hind-wings. 
