PASSAXDRIDAE. 615 



three minute denticles along the outer edge. Tarsi pentamerous, the 

 elongate terminal articulation as long as the basal four combined ; claws 

 stout, considerably thickened underneath at the base. 



Undoubtedly nearly related to Chaetosoma, but the terminal joints of 

 the palpi are thicker and subsecuriform ; the mandibles are quite half the 

 length of the head, they are strongly curved and acuminate towards the 

 extremity, and each has a prominent inner tooth near the apex ; the thorax 

 is remarkably different, and the humeral angles are quite without dentiform 

 projections. 



4183. Chaetosomodes halli sp. now 



Shining, black, legs and palpi chestnut-red, mandibles and antennae 

 piceo-rufous ; each elytron with five smooth flavescent spots, the first, 

 at the base, and a pair just behind it are somewhat rounded ; the fourth is 

 transverse, situated on the middle, but does not extend to the suture ; fifth 

 subapical, subrotundate, larger than the basal ones. 



Head with moderately coarse, close, rather elongated punctures, but 

 with a smooth spot close to each eye, and the forehead nearly smooth across, 

 the front. Thorax similarly punctured on the middle, less closely towards 

 the sides. Elytra with almost quite regular series of moderately coarse 

 rotundate punctures, these become a little finer near the apices, but are 

 almost entirely absent from the yellowish spots. 



Underside black, nitid ; presternum rather coarsely and closely punc- 

 tured, abdomen irregularly, some parts smooth. 



Length, 10 mm. ; breadth, 2\ mm. 



Lake Rotoiti, Nelson. This, the finest New Zealand species of the 

 group, is named in honour of Mr. T. Hall, who found a single individual 

 on the 5th February, 1916. 



Group Melolonthidae. 

 Odontria White. Man. N.Z. Coleopt., p. 265. 



4184. Odontria nesobia sp. now 



Subovate, widest behind the posterior femora, moderately convex and 

 shining ; rufo-castaneous, the head more rufescent, antennae, palpi, and 

 legs more or less fusco-testaceous ; thinly covered with distinct, rather 

 elongate, decumbent and erect, flavescent setae. 



Most nearly resembles 0. puncticollis (3743). but differing in. some 

 respects from the female of that species. 



Eyes very finely faceted. Clypeus coarsely, closely, and rugosely 

 punctured. Thorax rather more coarsely but not as closely punctate, 

 the base more angulate at the middle and more strongly bisinuate. 

 its hind angles are subrectangular, instead of being obtuse or rounded. 

 Scutellum almost smooth. Elytra thrice the length of thorax, more gradu- 

 ally and less dilated posteriorly, their apices subtruncate so that the 

 sutural angles are almost rectangular in place of being rounded ; the 

 sutural striae are well marked, the others are obsolete, the punctation is 

 rather coarser. 



Underside fusco-testaceous, the breast with numerous elongate yellow 

 hairs, these become finer and more distant on the abdomen. Metasternum 

 with a slender nigrescent carina along the middle, finely and closely punc- 

 tured. Abdomen finely and distantly punctate but with some longitudinal 



