Broux. — Revision of the New Zealand Cossouidse. 199 



Mr. J. H. Lewis kindly placed at my disposal his unique specimen of 

 the type of this genus, Sharp's Pentarthrum hehnsiamim. Among the foui- 

 teen exotic genera of the section of Pentarthrides in which Pentarthrum is 

 placed, not one can be found to correspond with Protogonum in structure 

 or facies. I need not specify the differences between this genus and Pen- 

 tarthrum, as they have scarcely any part of their structure alike. The an- 

 terior portion of the rostrum to a slight extent resembles that of the Malayan 

 Megacerus, one of the Brenthidce. 



Protogonum helmsianum, Sharp. 2196. Man. N.Z. Coleopt., p. 1247. 



(Plate XVI, fig. 8.) 



Nitid, black, tarsi and funiculus piceous, club opaque, densely and 

 minutely pubescent. 



Rostrum finely longitudinally rugose and punctate in front, nearly 

 smooth at the apex, the punctuation more distinct and almost seriate behind 

 and continued for some distance beyond the eyes ; occiput smooth. Thorax 

 moderately convex, deeply constricted in front, with a slight foveiform 

 impression at each side near the apex, its surface moderately closely, dis- 

 tinctly, and evenly punctured. Scutellum with a slight median transverse 

 impression. Elytra distinctly but not coarsely striate-punctate, quite 

 striate behind, the sutural striae rather broad near the base ; interstices 

 with fine serial punctu^res, and, in my specimen, quite shining. 



Underside black, moderately nitid, sparingly minutely setigerous. Meta- 

 sternum evenly but not closely or coarsely punctured, with a fovea near 

 each side at the middle, the basal ventral segments more finely and closely 

 punctured. The buccal cavity is not deep, and the rigid palpi are quite 

 discernible. 



J . Length, 2| lines ; breadth, f line. 



Greymouth. 



Ohs. — This genus is placed at the end of the Pentarthrides, as I had not 

 seen it until after the revision had been completed. 



Group COSSONIDES. 



Funiculus 7-articulate. 



Phloeophagosoma, Wollaston. Man, N.Z. Coleopt., p. 529. 



Body fusiform or elongate subovate-cylindricum, moderately shining, 

 glabrous. 



Rostrum as long or nearly as long as thorax, moderately stout, parallel, 

 rarely slightly dilated medially or basally. Eyes moderate, lateral. Thorax 

 usually elongate, ovate-triangular, slightly constricted in front. Scutellum 

 rather small, but distinct. Elytra elongate, the base wider than that of 

 the thorax, subparallel, gradually narrowed posteriorly. Scape moderately 

 elongate, stout, medially inserted, reaching beyond the back of the eye ; 

 2nd joint of the funiculus sometimes longer than the 3rd. Club large, 

 indistinctly annulate. Legs stout, inner angle of the tibiae produced, with 

 a spinule there. Tarsi with their 3rd joint slightly dilated, rarely sub- 

 bilobed, claws small. 



Metasternum rather long, sharply sulcate medially behind. Anterior 

 coxae widely separated. 



Allied to Rhyncolus, but differing therefrom in having the rostrum more 

 slender and elongate, more medially inserted and thinner antennae, with a 

 more abrupt and larger club, and less prominent eyes. From Phlosophagus 



