neic S/iccica of IlistciiiUu. 317 



IsuloiiKilus eluixjdtiis, s|). ii. 



Elongates, jianillolns, 8iil)do|)rc'ssiis,uigfr, nit ifliis, undiciue imiirtal us ; 



froiito plana, iiuiictulata ; mesoslcriio aiitice haud marj^inato ; 



l)ygidio postice uiargine clcvato, aiitice vcrmiculato ; tibiis anticis 



r)-(lvntatis. 

 I.. '2\-2\ mill. 



Elongate, parallel at the sidcS; somewhat depressed, black 

 and sliining ; the head clearly punctured, stria complete ; 

 the thorax, marginal stria obsolete behind the neck, lateral 

 ))nnctiircs somewhat oblong and well marked, punctures on 

 the disc resemble those of the head, but they are evanescent 

 liehind the neck J the elytra are more distinctly punctured 

 than the thorax, but on the same plan, largest latterly, finer 

 on the dorsum, with the sutural margin smooth, sutural stria 

 fine and reaching just beyond the middle ; the i)ropygidiuni 

 is flat and very distinctly punctate , the pygidium <^ has a 

 raised rim with a crescent sulcus within it, the disc is 

 irregularly not finely vermiculate ; the prosternum, lobe 

 slightly punctured and with the keel microscopically strigose ; 

 the mesosternum is deeply margined at the sides only, with 

 two fine detached striaj at the suture formed like inverted V'« ; 

 the pygidium ? is densely puiictulate ; tiie anterior tibite 

 5- dentate. 



Hub. Para and Santarem, Amazon River (//. //. Smit/i). 



Isolomalus iruncatuSf sp. n. 



Farum clongatus, parallelus, depressus, iiiger, nitidus; stria froiitali 

 Integra ; elytris apicibus anguste impunctatis ; propygidio disco 

 conspicuo i)unctato; prosterno hand striate; mesustcrno stria 

 suturali interrupt a et biurcuata. 



L. 1^] mill. 



liather long, parallel, depressed, black and shining ; the 

 head clearly and rather closely jjunctured, frontal stria com- 

 ])lete ; the thorax punctured, finely strigose laterally, marginal 

 stria complete, disc finely punetulate ; the elytra, sutural 

 stria abbreviated before the middle, sutural margin smooth, 

 surface punctate and feebly strigose longitudinally, apical 

 margin smooth; the propygidium, disc conspicuously punc- 

 tate, outer margin smooth ; the pygidium, ^ apex obtusely 

 triangular and punctured, base deeply, irregularly, and 

 unevenly sculptured, $ unknown ; the prosternum, anterior 

 lobe rather coarsely punctured, keel more finely pointed and 

 without striaj ; the mesosternum immarginato anteriorly, 

 laterally there is a well-marked stria, the sutural or transverse 



