OF NEW ZEALAND, 983 



D. obtusum the head is less constricted behind the eyes, and the 

 thorax is less oviform. D. dubium, I think, must be a broader 

 insect with distinct punctures on the front of the thorax. 



Length, 5J ; breadth, If lines. 



Puysegur Point. Mr. Hansen. 



Acallistus. 



Nov. gen. 

 (Sharp; Trans. Boy. Dub. Soc., Nov., 1886, p. 362.) 



Ex affinitate generis Promecoderi, sed corpus superne sub- 

 planatum, et tarsi intermedii maris simplices, anteriores subtus 

 imperfecte spongiosi. 



The insect for which I establish this genus is very different from 

 the other New Zealand Broscidce, the thorax being finely margined 

 at the sides, and furnished with only two tactile setce, one some dis- 

 tance behind the front angle, and the other about equally as much 

 in front of the hind angle. The antenna are slender, pubescent 

 from the fourth joint onwards ; the front tibia are not at all pro- 

 longed externally ; there is a seta in the scrobe of the mandible ; 

 the labrum is large, feebly emarginate almost truncate, in fact in 

 front, and its setigerous punctures are minute. The palpi are all 

 slender, with slightly truncate apex ; the lobes of the mentum rather 

 short, and its excision has a small triangular tooth in the middle. 

 The front tarsi of the male are but little dilated ; the basal joint is 

 rather elongate, and is furnished with a transverse patch of spongy 

 clothing at its extremity; the second and third joints are nearly 

 entirely covered beneath, but the small fourth joint appears to have 

 no sexual clothing, though that projecting from the third joint 

 somewhat covers its base. The intermediate tarsi in this sex are 

 not dilated, and are without clothing. 



The characters bring this genus very close to the well-know r n 

 Australian genus Promecoderus, but the appearance is very different, 

 owing to the comparatively flat upper surface of the body ; and, as 

 the male feet present apparently well-marked differences from those 

 of Promecoderus, it would not be proper to place the New Zealand 

 insect in that genus. 



1770. A. simplex, n.s. (Sharp ; Trans. Roy. Dub. Soc., Nov., 

 1886, p. 363.) Niger, supra subviridescens, subopacus, antennis 

 tarsisque piceo-rufis ; prcthorace posterius angustato, transversim 

 subtiliter strigoso ; elytris striatis, striis punctatis. 



Long., lO^mm. 



Head dull-black, without sculpture. Thorax just as long as 

 broad, truncate in front, curved at the sides, considerably more nar- 

 rowed behind than in front ; hind angles extremely obtuse ; the sur- 

 face dull, without any punctuation ; channelled along the middle, 

 the channel equally abbreviate in front and behind, with a few 7 fine, 

 but distinct, transverse wrinkles. Elytra much curved at the sides, 

 with distinct, but quite shallow, striae, which are somewhat coarsely 



