54 MARTIN JACOBY 
the extreme apices being also of that colour. A. austrocaledonica 
may be known from several other species which are closely 
allied in colouration, by the black vertex of the head which is 
only divided in the middle by a narrow fulvous streak. Mon- 
trouzier evidently did not know the male insect, of which several 
specimens are before me; in that sex the antennae, as is often 
the case in the present genus, have the third to the fifth joints 
dilated; in the species before us, the third joint is only slightly 
thickened but elongate, the second is much widened towards 
the apex and its lower edge is projected into a sharp point, the 
next joint is of only half the length of the preceeding and of 
triangular shape, the colour of the entire antennae and that of 
the legs is fulvous. It is possible, that the New Guinea speci 
mens represent a closely allied but distinct species, this point 
can only be settled by comparing the type of Montrouzier. I 
believe that the structure of the antennae in the males of this 
genus will often give good distinctive characters, as colour is of 
little use in these variable species. 
21. Aulacophora apicalis, n. sp. 
Black; head and thorax impunctate; elytra finely punctured, 
testaceous, the apical third, black; antennae obscure fulvous. 
Length 3 lines. | 
Head with a deep transverse groove between the eyes, the 
latter very large and prominent; the frontal elevations narrowly 
transverse, the carina acutely raised; penultimate joint of the 
palpi incrassate ; antennae slender, fulvous, the fourth and the 
three following joints equal, the rest wanting; thorax twice as 
broad as long, the sides narrowed towards the base, the surface 
with a deep and straight transverse groove, slightly interrupted 
at the middle, impunctate; elytra narrowly parallel or slightly 
widened behind, very finely punctured, the two anterior thirds, 
testaceous, the apical portion black; tibiae and tarsi obscure 
piceous, rest of the underside and legs, black; the tibiae mu- 
cronate; the first joint of the posterior tarsi as long as the. 
