19 
minus subtiliter punctulato ; palporum maxillarium articulo 
ultimo securiformi, quam precedens multo longiori ; mandi- 
bulis ad apicem simplicibus minus acutis; antennis modice 
robustis longioribus (maris multo, femine parum) quam cor- 
poris dimidium, articulo 2° brevi, ultimo vix perspicue appen- 
diculato ; oculis modicis, sat transversis, modice (7.¢., V1x 
fortiter) granulatis ; prothorace subcordiformi, crebre sub- 
fortiter punctulato, ante medium transversim depresso, quam 
latiori paullo longiori ; elytris confertim subtiliter subaspere 
punctulatis, lineis subelevatis 3 vix perspicue instructis ; 
antennis ab oculis intervallo parvo separatis ; unguiculis 
inermibus. Long., 3—5 1.; lat., 1—1/ 1. 
Boisduval’s description merely mentions the colours and the 
puncturation of the prothorax, but as they apply very satisfac- 
torily to the insect before me, I have thought it best to re- 
describe it with Boisduval’s name,—wnich appears in Master’s 
Cat. under Ancana. It agrees in all respects with Horn’s 
diagnosis of Oxacis except in its form being (for an Gdemerid) 
somewhat robust rather than slender. Champion calls the eyes of 
Oxacis “coarsely” granulate (Horn does not characterise the eyes), 
which they are not in the present species, though they can 
scarcely be called “ finely” granulate ; their granulation is finer 
than in Copidita, and less fine than in Dohrnia (e.g., Simplex, 
Champ. ). , 
S. Australia ; not rare on flowers. 
O. (Ananca) Zietzi, Blackb. This species-:agrees like the 
preceding with the characters attributed by Mr. Horn to Oxacis 
(in one of them even better, the antenne being more slender) 
and agrees better with Mr. Champion’s additional character, its 
eyes being somewhat more strongly granulated ; nevertheless, it 
cannot, in my opinion, be rightly regarded as congeneric with tne 
preceding, differing from it in respect of characters that are not 
mentioned by Horn or Champion, of which the principal seems 
to be as follows :—The apical joint of the maxillary palpi, while 
twice as long as the preceding joint, is much less strongly securi- 
form than the same joint in australis, Blackb. (? Boisd.); the 
tarsi are much more slender, and, owing to the penultimate joint 
‘being much smaller, the claw joint projects very much further 
beyond the penultimate ; owing to the long immersion in spirits 
of the insects of the Callabonna expedition, the exact structure 
-of the under surface of the tarsal joints in this species is not 
easy to determine, but as far as I can see the antepenultimate, 
as well as the penultimate, joint is spongy-pubescent, and if I 
were sure of that character it would, no doubt, justify the 
creation of a new genus for O. (?) Zietzi. Its mandibles are (like 
-those of australis) simple at the apex; though narrowed to the 
