SILPHIDAE. 683 



Group SiLPHIDAE. 



Isocolon Broun. Man. N.Z. Coleopt., p. 1070. 

 4278. Isocolon oruruensis sp. nov. 



Nitid, oblong-oval, moderately convex, glabrous ; castaneous, elytra 

 irregularly infuscate. 



Head behind almost as broad as front of thorax, with a few fine 

 punctures there ; its anterior portion much paler, narrower, deflexed and 

 strongly incurved between the antennae. Eyes subrotundate, quite lateral, 

 slightly convex and facetted. Thorax nearly twice as broad as long, base 

 and apex subtruncate, with obtuse angles, its sides finely margined, slightly 

 curvedly narrowed in front ; irregularly, sparingly, and finely punctate. 

 Scutellum triangular, flat and indistinct. Elytra double the length of 

 thorax, of almost the same width as it is at the base, finely marginate, 

 gradually narrowed posteriorly and entirely covering the abdomen ; with 

 slender sutural striae, finely- and subseriately punctate, less evidently near 

 the sides and apex. 



Antennae equaUing the head and thorax in length, with slender pale 

 pubescence ; basal joint but little stouter or longer than the next, third 

 scarcely any longer, joints 4—6 rather shorter, 7 distinctly broader, obconical, 

 8 very short, not as broad, 9 and 10 quite transverse, the terminal rather 

 longer and narrower than 10. 



Femora, except the posterior, scarcely visible from above ; tibiae finely 

 pubescent, bicalcarate inwardly at the extremity, spinose externally ; tarsi 

 pentamerous, not broadly expanded, fourth joint of the anterior pair 

 smaller than that of the posterior, terminal joints slender, nearly as long 

 as the others taken together. 



Terminal joint of maxillary palpi almost as stout as the penultimate 

 but twice its length. 



Underside finely and thinly pubescent. Coxae contiguous. Meso- 

 and metasternae of almost equal length. Basal segment of abdomen a 

 little longer than any of the following three, fifth rather longer than fourth. 



Length, 2h mm. ; breadth, 1 mm. 



Oruru, North Auckland. Discovered by Mr. A. E. Brookes, amongst 

 decaying leaves, on the 6th October, 1918. 



.Group Synchitidae. 

 Ulonotus Erickson. Man. N.Z. Coleopt., p. 186. 

 4279. Ulonotus affinis sp. nov. 



Elongate, moderately convex, subopaque ; rufo-fuscous, antennae, palpi, 

 and legs fusco-rufous ; irregularly covered with short suberect yellowish- 

 grey setae. 



Head indistinctly sculptured, labrum prominent and rufescent. Thorax 

 only slightly broader than long, apex strongly rounded in the middle, 

 rather deeply emarginate towards the subacute prominent angles ; its 

 sides slightly flattened, finely crenulate, gently widened from the front 

 to behind the middle, from thence distinctly narrowed backwards, but 

 with a slight angular dilatation in front of the base ; disc irregularlv and 

 finely granulate, quadri-impressed, the longest depression before the middle, 

 the smallest close to the base, the other jmir behind the middle. Scutellum 

 small. Elytra rather broader than thorax, more than twice its length. 



