308 Mr. J. Ralfs on Spirulina and Coleochete. 
costa; the outer margin is ochraceous brown, bordered internally 
with black, externally with a bright silvery line, and marked to- 
wards the apex between the nervules with three or more silvery 
vitte. Posterior wings ochraceous brown, margied externally 
by a silvery line; a vitta in the cell, commencing above it at the 
base of the subcostal nervure, a very slight one above the first 
subcostal nervule, a long slender one below it, followed by four 
very distinct ones in the interstices between the nervules, a longer 
one extending to the base between the median and radial ner- 
vures, and a similar one between the latter and the abdominal 
margin bright silvery white, all except the two first-mentioned 
connected with the marginal line. Cilia of the anterior wings 
rufescent, darkest towards the anal angle ; of the posterior ochra- 
ceous brown. 
Head brown ; antennz brown above, white below ; palpi light 
brown. 
Thorax clothed with long brown hair ; legs very pale brown. 
Abdomen black above, very pale brown below. 
The female is smaller, much paler in colour ; the outer margin 
of all the wings above, and of the anterior below, very pale brown ; 
the apex of the anterior marked above with two silvery vitte, 
their discoidal cell on both sides and that of the posterior above 
with a fulyous vitta. 
In the collection of the British Museum, Mr. W. W. Saunders, 
&e. 
The only specimens of this insect which I have seen were ob- 
tained by P. Earl, Esq., who discovered them on a plain in the 
southern island of New Zealand. The specific name was sug- 
gested to me by Dr. Boisduval, who agreed with me in the opi- 
nion that it was one of the most, if not the most, teresting spe- 
cies of the family yet known. At present it is the only one from 
New Zealand. 
XXXITI.— On the Genera Spirulina and Coleochete. By Joun 
Ratrs, Esq., M.R.C.S., Penzance*. 
{ With a Plate. ] 
SprrvuLina, Turpin (Kiitz.). 
Filaments collected into a mucous film-like stratum, simple, 
spiral, oscillating, “inarticulate.”—Aiitz. Phycologia Generalis, 
p- 182. 
Spirulina has its filaments interwoven into a thin stratum of 
* Read before the Botanical Society of Edinburgh, Dec. 12th, 1844, and 
Jan. 9th, 1845. 
