170 EXARTEMATOrUS. 



at their immediate base, and gradually dilated ; when viewed from 

 above, the anterior surface is longitudinally grooved, especially near 

 the insertion of the tarsus, where it is obliquely truncate. The 

 tarsus is short and robust ; the first joint transverse, triangular ; the 

 second of the same form, but more minute ; the third subtrian- 

 gular, hardly bilobed : in different examples the first and second 

 joints are more or less subequal, but in all examples the terminal 

 joint is distinctly broader than the others : the terminal claw is 

 bifid, simple, robust, and slightly dentated at the inner margin near 

 the base. The posterior femora are robust, incrassated, ovate. The 

 tibia is short, inflected at the immediate base, gradually thickened 

 towards the apex ; when seen from behind, the posterior surface is 

 longitudinally grooved, forming at the apex a socket for the reception 

 of the tarsus, and armed at its lower extremity, below the insertion 

 of the tarsus, with two incurved spurs. The tarsus is attenuated ; 

 the first joint dilated, and transversely truncate at the apex ; the 

 second of the same breadth, but shorter and more triangular ; the 

 third minute and subcircular ; these three joints are clothed on their 

 under surface with thick pubescence ; from the base of the third 

 proceeds the ultimate joint, which terminates in a broad globular in- 

 flation completely concealing from above the apical claw. 



This genus has very distinct characters : the antennae are robust, 

 not short, and incrassated at the apex ; the thorax is broad, the 

 anterior angles are very prominent, and its surface is not rounded, 

 but flat, in one plane, which is depressed at an angle of 45 degrees 

 to the plane of the elytra : these, together with the robust form of 

 the elytra (without reference to manifest peculiarities of structure in 

 the palpi and tarsi), are amply sufficient to separate it generically 

 from other forms. 



1. Exartematopus nobilis. (Tab. VII. fig. 2.) 



E. oblongo-ovatus, latus, impubescens, punctato-striatus, castaneus ; 

 capite brevi, inter oculos transverse foveolato, punctato, rufo- 

 flavo ; ihorace transverso, angvMs subproductis, antice emarginato, 

 lateribus marginatis, rufo-flavo, macidis quatuor cireidaribus, 

 lateribusque, fusco-nigris : elytris latis, subdepressis, punctato- 

 striatis, plagis sex jiavis ; i. e. duabus ad humeros (a sutura ad 

 marginem, maculas nigras duas continent/bus), duabus ad mar- 

 ginem (apud medium, parvis, immaeulatis), diudmsque apicem 

 juxta, macidam unam nigrum continentibus ; antennis r*obiistis, 

 artic. 1-5 ferrugineis, 6 nigro et subdilatato (reliqui mihi desunt); 

 pedibus ferrugineis, femoribus poitf/r/s {antice et superne visis) 

 castanets. 



Long. corp. 3 lin., lat. 2 lin. 



