OF NEW ZEALAND. 75 



Group DYTISCHX3S. 



Antenna eleven-jointed, inserted immediately in front of and a little 

 below the eyes. Scutellum distinct. Tarsi five-jointed ; the three 

 first of the anterior dilated in the male in the form of large sub-orbicular 

 plates, provided below with cupules of unequal size ; the same joints o- 

 the intermediate tarsi in the same sex sometimes simple, sometimes 

 dilated and furnished with equal cupules; the posterior tarsi very broad; 

 hind coxae of normal form. Prosternum straight. 



Cybister. 



Curtis; Lacord. Hist, des Ins. Coleop., Tom. i.,/. 427. 



Middle lobe of the chin short, wide, hollowed. Last joint of the 

 palpi a little arched and truncated at the end, the two last of the labial, 

 and the third of the maxillary, equal. Labrum sloping, hollowed in the 

 middle. Head large, epistome truncated in front; eyes large and 

 rather prominent. Antenna short, slender, setaceous ; their first joint 

 longer and stouter than the others, the second short, third and fourth 

 longer than those which follow. A distinct scutellum. Elytra oblong- 

 oval, dilated beyond the middle, and depressed behind. Anterior legs 

 short, rather slender ; the three first joints of their tarsi forming, among 

 the males, a large palette, transversely oval in form, spongy at the base, 

 and provided in front with four rows of cupules of equal size ; interme- 

 diate tarsi compressed in both sexes, their claws unequal in the males ; 

 posterior legs very robust, their tarsi wide, ciliated on both sides in both 

 sexes, and terminated by a single fixed hook. Prosternal process lanceo- 

 late, and acute behind. 



Body oblong-oval, slightly convex. 



141. C, llOOkeri, White; Voy. Er. Terr., Ins., p. 6. Front of 

 head with two impressed dots ; thorax behind with a band of short, 

 closely placed striae, and a few dots along the front and close to the 

 margin ; outer margin of elytra with many impressed dots and three 

 distant rows of dots on the back of the elytra, the dots far from each 

 other, especially on the two outside rows ; clypeus and front of head 

 yellow ; lateral margin of thorax and elytra yellow, the yellow reaching 

 the outer edge, other parts of a very deep olive-brown ; some ferrugin- 

 ous-brown on two fore-legs ; antennae ferruginous and brown mixed. 



Length, 12 lines ; greatest width, 6J lines. 



Hutt River, Port Nicholson. 



NOTE. This species occurs at Marsden Point, Whangarei Harbour. 

 I am indebted to Mr. Hugh Munro for my first specimens. Another, 

 and somewhat similar, species has been introduced into the Napier 

 district from Australia, which may be identified by its purplish-red 

 scutellum. I received a mutilated specimen from F. M. Meinertzhagen, 

 Esq., and on comparing it with my specimen of C. scutellaris, which 

 had been sent to me by Professor McCoy of Melbourne, I found it 

 identical with the Australian insect. 



