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OX SOME NEW GENEKA AND SPECIES OF COLEOPTERA 

 IN THE TRING MUSEUM. 



By ])K. K. .JORDAN. 



1. Hexarthrius aduncus sj). nov. 

 (PI. Xlil., fis. 1.) 



i. //. uiger, intra ]]uniiii nibescens, elytris obscure rubro-ctistaneis, alidomine 

 et pedibus anticis obscine iiibris, ])udibns qiiatiior i)osti<i.s (tarsi.s subnigris e.xceptis) 

 rubris. 



Maudibnlae modicc iiRliiiatao, i|uatii()r ileiitibns armatae, deiite jiriiuo basali 

 tnincato versus j)ostiouui directo (fere sicut iu Clwloynatlio giraffa),icT\.\o maguo 

 subacuto recto uouico iu tertia parte apicaii ; secuudo parvo iuter priinum et tertium, 

 primo plus quam tertio approximate, nuartci parvo ante apicem sito, apice ipso 

 simplice, inter apicem et dentem tertiam jiaucis dcuticulis iustruc^tae, maigine exteriore 

 e regione dentis tertii parum iucurvato ; basi sine cariua aiit deute dorsali. Clypeus 

 parvus, triaugnlaris, valde iucliuatns, simplex ; caput medio minime impressum, sat 

 planatum, margino auteriore medio vix producto, utrimcjue leviter sinuato, angulis 

 auticis iuterioribus rotundatis, paulo magis quam marginis medium versus auticum 

 promiueutibus, extcrioribus (ante oculos) rectis. I'rotborax medio levissime caua- 

 liculatus, latcribus fortiter (sicut caput), disco miuutius granulosus, in apice parum 

 augustior quam ante basim. Elytra laevia, sine sciilptnra distincta. 



Mentum et caput infra fortiter, prosternum miuntins, metasteruum minntissimc 

 granulosa ; abdomen laeve. 



Long. (mand. excl.) oO mm., mandibl. 'ZA, elytr. 27, hit. '-Jo. 



Allied to H. (/uvisoni Waterb., wbieh has also an interior basal tooth on the 

 mandibles directed backwards ; but this tooth is acuminate iu H. dacisoni, while it 

 is truncate in the new form ; then there is a smaller tooth at the end of the basal 

 third of the maudible, which is wanting iu JJ. (Idrisoni, and the largest tooth is 

 much farther from the tip of the mandible than in Ch. 0. Waterhouse's species, 

 since it stands just before the beginning of the apical third ; the outer edge of the 

 maudible i)i)j)osite the large tooth is somewhat bent inwards. 



Hub. Assam. Three males of the same size. 



M. Hexarthrius elougatus sp. nov. 



S (forma minor). //. nigcr, parum bruunescens, elytris posticc plaga sat 

 parva indistincte circumscripta jiallide castanea notatis, jjcdibus (geuibus tarsique 

 exceptis) castaneis. 



Maudilndae versus medium levissime latiores, ab medio iuclinatae, in basi vix, 

 dein gradatim leviter arcuatae, in tertia parte apicaii deute sat brevi, ante apicem 

 deute secuudo, primo fere aecpiali, armatae, basi excepta obtuse denticulatae, basi iu 

 latere externo et infra subplana, carina infero-latcrali medium mandibulae uon 

 attingeute iustructa. Clyi)cus tridenlatus, dentibns lateralibus lirevibus jiarum 

 versus sujiernm recurvatis subrectangularibus, deute mediauo truncato, simplice, 

 supra miuutissime carinato. Caput dense granulatum, sicut clypeus et mandibulae, 



