1042 COLEOPTEEA 



there are two dorsal impressions behind, and the sides are broadly 

 impressed. Scutellum minutely transversely strigose. Elytra 

 rather wider than thorax, oblong, slightly narrowed towards the 

 base, apices subtruncate and densely minutely ciliated ; punctuation 

 distinct, nearly quite serial, a little less evident behind ; they bear 

 a few short, yellowish hairs. Hind-body longer than but hardly as 

 broad as elytra, its pubescence elongate and slender, but very short 

 and erect on the two apical segments ; the basal segment fringed 

 with minute brassy hairs, the second with a rounded median spot 

 covered with similar pubescence ; the sculpture fine. 



Ischnoderus tectus, No. 219, is the nearest ally, which, however, 

 has a shorter and flatter hind-body, and with the middle and 

 posterior tibiae straight, instead of being bent inwardly, as is the case 

 in I. fultoni, which, moreover, is a rather larger insect. This 

 species, I consider, forms a connecting link between Omalium and 

 Ischnoderus. 



Length, If lines ; breadth, f line. 



Taieri. It bears the name of its discoverer, Mr. S. W. Fulton, 

 of Outram . 



Omalissus. 



Nov. gen. 



The following characters distinguish this genus from Omalium : 

 Palpi with the terminal joint much more slender, quite 

 acuminate. Labrum large, deeply and widely emarginate in front, 

 appearing bilobed. Antenna inserted below the front edge of the 

 forehead at the sides ; the forehead quite truncate in the middle, ex- 

 posing the large membranous clypeus ; antenna gradually thickened. 

 Mandibles rather large and prominent. Scutellum absent. Tarsi, 

 anterior and intermediate, with the four basal joints considerably 

 expanded, the posterior elongate and slender ; claws unequal, those 

 of the hind tarsi well developed, the anterior quite minute. 



1865. O. CastaneuS, n.s. Parallel, subdepressed, moderately 

 shining ; castaneous, head and thorax darker, lateral margins of the 

 latter rufescent, legs and antennae obscure-red, tarsi yellowish, 

 mandibles glossy red, clypeus, labrum, and its membranous appen- 

 dage more or less pallid. 



Head subtrigonal, not contracted just behind the eyes, but 

 abruptly narrowed towards the neck ; finely punctate ; ocelli not at 

 all conspicuous, situated on the hind part close to the neck frontal 

 and occipital impressions obsolete or altogether wanting. Antenna 

 finely pubescent, rather short ; second and third joints equal, rather 

 shorter than first ; joints 4-10 differing but little, 6-10 transversely 

 quadrate, eleventh ovate. Thorax about one-third broader than 

 long, base and apex truncate, touching the elytra ; the sides finely 

 margined, but little rounded, slightly narrowed behind, basal angles 

 obtusely rectangular, the anterior rounded but scarcely depressed ; 

 disc slightly convex, without depressions, a little flattened near the 

 hind angles, finely and closely punctured. Elytra a little broader 



