82 cor.KocTKnA. 



(Iiniii) ( 'm:m.\( ANi iiin.vi:. 



3388. Mecodema costipenne sp. luiv. Mrcndenia Bl;inch:iril, Miiii. N.Z. 



("uli'()j)t ., j). 7. 



Obluiig, slightly convex, only moderately iiitid, elytia >iil)iiiiii<|Ui' ; 

 nigrt'siceiit. legs, antennae, and palpi somewhat rufo-piceous. 



Iliad, including the prominent eyes, almost as broad as the thorax, 

 witli numerous distinct punctures across it behind the eyes, vertex 

 nearly smooth, its sides irregularly, the forehead longitudinally and 

 deeplv striate; labrum dbtusdy ronndi'd and (|uadri|>uiictatc. Thorax 

 nearly a third broader tlian long, widest near the front, gradually 

 curvedly naiiowed backwards, without any abrupt basal contraction, 

 apex feebly incurved; its sides are not perceptibly crenulate, and the 

 marginal ciiannels are of about i-ipial widrli throughout, but end just 

 before the basal fossae, which are situated near the obtuse angles; there 

 are some short, very lightly impressed, longitudinal striae near the 

 front and base; the disc is nearly smooth, having only a few curvate 

 striae before the basal fossae; near the apex a shallow curved impres- 

 sion extends almost right across it; the median groove does not reach 

 the front uy base. Elytra oblong-oval, a little bioader than and twice 

 the length of the thorax, broadly rounded at the extremity; each 

 elytron is broadly and obviously tiicostate, the suture also appears 

 slightly raised, the additional lateral costa does not reach the shoulder, 

 and all become obsolete towards the apex; the intervals between the 

 costae have somewhat irregular, latlier shallow, double series of 

 punctures, the external, oi' 4th, series of punctures are rather larger 

 and deeper, yet not very coarse, and less distinctly duplicated, none 

 attain the apex. 



Legs moderately stout; tlie anterior and intermediate tibiae are 

 only slightly, the posterior not at all, prominent at the outer angles. 

 Antennae finely puWscent beyond the 4th joint. 



Underside shining, almost smooth, with a pair of apical setigi-rous 

 punctures at each side of the terminal ventral segment. 



This species, owing to the conspicuously ribbed elytra, and almost 

 regularly rounded sides of the thorax, is r«'ii.arkably distinct. .1/. ros- 

 tclhiin, 2-")9."), measures 40 mm. in length; irs thoiax is conti'acted 

 and straight-sided at the base and the marginal channels are expanded 

 in front, the elytral costae are narrow, and the interstices are numerously 

 and irregularly punctured. 



?. Length. 27 mm. ; Ijvca.hli. !» iinn. 



liouteburn, Lake Wakatipu. Described from a damaged specimen 

 fovind by Mr. 0. V. Hudson in February, 1911. 



3389. Mecodema angustulum sp. nov. 



Elongate, moderately narrow, slightly convex, shining; bhuk, tarsi, 

 antennae, and pal])i rufo-piceous, the labriim and femora more rufescent. 



Head nearly as long l»ut hardly as broad as the thorax, with pro- 

 minent eyes; vertex nearly smooth, the sides irregularly, the forehead 

 deeply longitudinally sulcate, finely transversely punctate behind the 

 eyes; lal)rnm snbtruncate. with ("> sttig'-rous jMnrturtN. Thorax 

 apparently elongate, yet actually of equal length and breadth; its sides 

 slightly crenulate, nearly straight towaids the front, just perceptibly 

 wider In-hind the middle, narrowed but not abiuptly behind, tlir base. 

 however, has almost stiaight sides, posterior ingles subieetangidar, there 



