368 Mr. F.P. Pascoe on some new Australian Longicornia. 
scattered, erect, minute hairs; head much broader than the prothorax, 
black, impunctate, but scored with exceedingly minute transverse lines ; 
parts of the mouth, except the tips of the mandibles, pale ferruginous ; 
prothorax not so long as the head, but considerably longer than its 
greatest breadth, impunctate, the two discal tubers well marked, the 
lateral tubers also very large and obtuse; scutellum small, subtrans- 
verse; elytra broader than the head, impunctate, somewhat silky, espe- 
cially posteriorly ; from the suture, considerably below the scutellum, a 
narrow, white pubescent line, curving gradually outwards posteriorly ; 
behind this, except a slight margin of reddish, silky black; body be- 
neath glabrous, shining, the abdomen very dark brown or black; legs, 
especially the tibize, clothed with a few, long, erect hairs; antennz 
more than half as long as the body, brownish towards the tip. Length 
5 lines. 
After avery close examination of Pseudocephalus formicides, Newm., 
and Ametrocephala monstrosa, Bl., I have come to the conclusion that 
they are congeneric. Mr. Newman’s being the oldest name would 
have been adopted, but that, according to M. Thomson, it had been 
previously used by Burmeister. I have, however, taken Ametroce- 
phala only provisionally: such unwieldy names should be looked on 
with disfavour. In collections, the genus Zoédia is sometimes taken 
for Pseudocephalus ; but the latter has rounded, or only slightly ovate, 
entire eyes. Pseudocephalus arietinus, Newm., from Tasmania, (ac- 
cording to the description) has the prothorax and elytra entirely 
black, except the white linear marks resembling the sign Arzes, to 
which it owes its name. Two specimens were in a collection at 
Glasgow, but they have probably disappeared. Of P. formicides, I 
may remind our Australian friends that itis exactly like an ordinary- 
sized black ant, and it is possible that as such it may have been over- 
looked. The specimen in the British Museum (Mr. Newman’s type) 
is the only one known to me. 
EX RETA. 
Caput exsertum, pone oculos constrictum, antice elongatum ; tuberibus 
antenniferis brevibus. Oculi reniformes, grosse granulati. Palpi tri- 
angulares, maxillares elongati. Antenne breves, basi distantes, scapo 
obconico, articulis tertio et ceteris subeequalibus, quinto et sequentibus, 
ultimo excepto, lateraliter apice subproductis. Prothorax oblongus, 
antice angustior, angulis posticis acutis. Elytra oblonga, parallela, 
depressa. Pedes breves ; femora fusiformia; tarsorum articulo penul- 
timo dilatato; core antics exsertze, globose. Acetabula antica integra 
vel obsolete angulata. Prosternum angustissimum. Mesosternum de- 
pressum. 
Technically this genus differs from Zsaliwm principally in its short 
