36 
Maris antennarum articulis 4—10 manifeste compressis,. 
articulo apicali breviter appendiculato deformi (sc. inzequali 
versus apicem tuberculo magno mamillato et tuberculis non- 
nullis minoribus armato. ) 
Fem. antennarum articulis 4—10 leviter compressis, ultimo 
breviter appendiculato. Long., 51. ; lat.. 2 1. (vix). 
Evidently variable in the markings of its elytra. I have 
before me three examples, no two of which are quite alike. In 
one of them the elytra may be described as bright yellow with the 
suture narrowly black for a short distance behind the base, this 
narrow black suture suddenly and squarely dilating about half- 
way between the base and the middle of the elytra into a very 
wide common sutural vitta and then dilating again about half- 
way between the middle and apex of the elytra to occupy the 
whole apex. The apical black is narrowly produced up the 
lateral margin nearly to its middle and then turns inward on 
the elytron and joins the sutural vitta, so as to enclose a large 
yellow spot. There is also an oblique black dash running hind- 
ward and sutureward (but not reaching the suture) from the 
lateral margin near its front. In another example the base of 
the elytra is narrowly black, and the oblique dash is continued 
so as to connect with the front margin of the transverse connec- 
tion between the sutural vitta and the black part of the lateral 
margin. The third example is like the type, except that the 
connection between the sutural vitta and the black part of the 
lateral margin is wanting. 
N.W. Australia ; sent by Messrs. Froggatt and Masters. 
POLYOPTILUS. 
It appears to me doubtful whether all the species that have 
been attributed to this genus are really congeneric, but there 
certainly seem to be serious difficulties in the task of separating 
them, inasmuch as there is only one of them (P. Lacordairei, 
Germ.) of which both sexes are known with certainty. At 
present, therefore, it seems well to regard the genus as dis- 
tinguished from otuer described Australian Sagrides by the 
following characters in combination ; metasternum not promi- 
nent between the intermediate cox (as it is in Mecynodera), 
elytra not spiniform at apex (as they are in Ametalla), prothorax 
not at its widest at the base (as it isin Carpophagus, Diaphanops, 
Pseudotoxotus, and Neodiaphanops), mandibles not bifid at the 
apex (as they are in Cheilowena), apical joint of maxillary palpi 
not securiform (as it is in Megamerus), hind femora not unarmed 
in combination with normal elytra (as they are in Prionesthis), 
eyes not depressed (as they are in Duboulayia), tarsi not short 
and having their basal three joints equal or nearly so, znter se (as. 
