38 On an undescribed Senecio, — 
specimen of Cicindela which only differs from Circumcincta 
by its fine light green colour; I suppose it to be a local 
variety. 
I will conclude with the following remark. _The Tetracha 
Australasice of Hope is perhaps the same as the Crucigera 
of McLeay, junr., but it is certainly different from the insect 
figured under the name of Awstralasiw by White, in the 
expedition of the Beagle (pl. 1, fig. 1). The latter belongs, 
I think, without doubt to the Humeralis of McLeay. 
With the addition of the sort lately described by Mr. 
McLeay in the fifth number of the “Transactions of the 
Entomological Society of New South Wales,” the number 
of Australian Tetracha is actually eight, and will be cer- 
tainly soon very much increased. 
Art. VI. —Characteristic of an wndescribed Senecio, from 
South Africa. By Frerp. MuELuer, M.D., F.R.S. 
In a communication very recently received from Peter 
MacOwan, Hsq., principal of Shaw College, of Grahamstown, 
the writer of this note has been desired to give an opinion 
on the specific validity of a new species of Senecio, dis- 
covered not long ago by that learned and ardent investi- 
gator of South African plants, in the vicinity of Algoa Bay. 
I entered on the examination with all the more pleasure, 
not only because the material for comparison of plants from 
extratropical Africa is extremely rich in the Phytologic 
Museum of Melbourne, but because I was also anxious to 
promote in any way within my power the researches of a 
gentleman who exercises already important bearings on the 
elucidation of the plants of the Capeiand, and who, moreover, 
has commenced to add largely to the South African collec- 
tions already in possesion of my institution, from the 
german naturalist and travellers, Ecklon, Zeyher, Drege, 
Pappe, and Gueinzius. 
The genus Senecio is not merely more widely distributed 
over the globe than any other existing, from the polar to 
the equinoctinal regions of both hemispheres (though 
almost absent in North Australia), but it embraces also more — 
species than any other, nearly a thousand being on record, some 
however but ill defined. The genus almost as rich in 
species, and almost as extensively diffused is Solanum, and 
then seemingly follow Panicum, Carcz, and Huphorbia 
