species of New-Zeahind Coleoptera. 229 



narrowed backwards, its extremity truncate. Tibim minutely 

 setose. 



Allied to 0. spadix, more slender, not at all ruEescent, 

 more finely sculptured, and with shorter differently formed 

 antennae. 



Length 1^ ; breadth | line 



Broken River {Mr. J. H. Lewis) ; one example, 



Omalium planiinarginatum, sp. n. 

 Elongate, depres>ed, shining, variegate ; head pitchy red, 

 the thorax, shoulders, abdominal margins, and terminal 

 segment castaneo-rufous, elytra piceo-t'uscous, hind body 

 castaneous ; legs and palpi t'ulvescent, basal five joints of 

 antennae clear red, remaining joints nigrescent and opaque. 



Antenna with the thick basal joint nearly double the 

 length of the oviform second, third evidently longer than its 

 predecessor; joints 4 and 5 moniliform, 6-10 abruptly 

 enlarged, laxly articulated, and transverse ; eleventh quad- 

 rate, but with a narrower false terminal articulation. Head 

 abruptly contracted behind, so as to form a short neck, which 

 is minutely transversely strigose ; it is as broad, including 

 the prominent eyes, as the front of thorax, it is finely yet 

 distinctly but not closely punctured, except on the broad 

 frontal impressions ; the ocular punctiform fovese small ; 

 ocelli rufescent. Thorax transversely quadrate, with rounded 

 anterior angles ; it is nearly straight behind the middle, basal 

 angles rectangular; its punctuation like that of the head, the 

 discoidal and lateral impressions similar to those of O. jlavi- 

 palpi. Elytra oblong, rather broader than and nearly twice 

 as long as the thorax ; suture smooth ; their punctuation 

 distinct and almost serial, but not so well marked near 

 the subtruncate apices. Hind body as long as wing-cases, 

 transversely convex ; basal four segments with broad lateral 

 margins, which, however, instead of being more or less 

 elevated, are quite depressed, these segments more distinctly 

 though not coai'sely punctured at the sides than on the 

 middle ; on the middle of the second there are two slight 

 rounded impressions, both of which are closely and very 

 minutely sculptured ; the fifth is narrower, but longer than 

 the fourth ; the sixth only half the breadth of the preceding 

 one, seventh still narrower. Tibiae finely setose. 



The pubescence on the hind body is fine, distinct, yellowish, 

 but slender and inconspicuous. 



This species is recognizable by the flattened margins of 

 the abdomen. 



(J . Length 1] ; breadth | line. 



Broken River. A single individual from Mr. J, H. 

 Lewis. 



