OF NEW ZEALAND. 533 



length, each more transverse than its predecessor, so that the seventh is 

 as broad as the club, which is large, ovate, and triarticulate. 



Metasternum moderate, grooved longitudinally, the first and second 

 ventral segments largest, yet not elongate, the third and fourth very short 

 and deeply grooved at the base ; anterior coxa with large cavities, more 

 approximated (but not at all contiguous) than the others, of which the 

 hinder pair are more widely separated. 



This is a very distinct form ; the mass of pubescence on the rostrum of 

 the male is peculiar, and the strongly dentate thighs are quite an ex- 

 ceptional character, more resembling some of the ErirhinicUz than any 

 known Cossonideous insect. 



946. L. opacus, n.s. Body rather dull fuscous-red, legs and an- 

 tennse reddish, the club of the latter fuscous and pubescent. Rostrum 

 slightly grooved above, not smooth, and covered with yellowish hairs. 



Thorax large, widest behind the middle ; the disc is depressed, with 

 an almost smooth dorsal line, is very closely and rather coarsely punc- 

 tured, the punctation becoming finer towards the front, so that the apex 

 is almost smooth ; its surface is clothed with short yellowish hairs which, 

 however, are chiefly confined to the sides. Elytra sub-depressed, rather 

 broad, gradually round^ posteriorly ; their sculpture consists of rows of 

 quadrate punctures separated from each other by rather narrow intervals, 

 so that they appear striate, the interstices are so sculptured as to be 

 rugulose, and they are sparingly clothed with short yellowish hairs. 

 Under-side punctate, with short pubescence. The female has a longer 

 rostrum, not ciliated as in the male, and more slender antennae. 



Length, 2-2! lines. 



I sent a specimen of this remarkable species to Dr. Sharp upwards of 

 a year ago, but in his recent paper on the Cossonidce it is overlooked. I 

 found two males at Tairua, and one female at Parua, near Whangarei 

 Harbour. 



Arecophaga. 



Nov. gen. 



The only exponent of this genus as yet known to me subsists on the 

 Nikau (New Zealand palm), a circumstance which has suggested its 

 generic name ; it is closely allied to Lasiorhinus, and bears a superficial 

 resemblance to L. opacus, but the body is less depressed ; the rostrum 

 is longer, more slender, and cylindrical, and not ciliated below in either 

 sex ; the legs are more slender, and the femora though thickened near 

 the middle, are not dentate ; the tibia are longer and not dilated 

 inwardly ; the third tarsal joint is more expanded and sub-bilobed, and 

 the antenna also differ ; these latter are rather elongate and slender, the 

 scape is flexuose and incrassated at the extremity, and reaches the eye ; 

 the funiculus is seven-jointed, the two basal joints are elongate, the 

 second a little shorter and more slender than the first, the third and 

 fourth are small, the seventh is longer and broader than the sixth, and 

 the club is ovate. The two front pairs of coxa are equally separated, 

 and not so far apart as the posterior pair. 



