BEVISION OF ELEODIINI BLAISDELL. 203 



General ohservations.—Th.e middle lobe of the mentiiiii is variable, 

 but nearly always triangular, in the large examples quite equilaterally 

 so; the apex is scarcely truncate, generally distinctly rounded; sur- 

 face more or less irregular from the broad, shallow, lateral fovea?. 



The prosterna in the series before me are exceedingly variable. In 

 the more strongly developed examples the prosternum is horizontal 

 and triangularl3% strongly mucronate ; in the smaller specimens it is 

 rounded antero-posteriorly and without a mucro, at other times it is 

 more or less mucronate behind and more or less convex between the 

 coxa^. The prosternum is not strongly prominent ventrally with the 

 coxa". 



The prosternum in forma grandis has an extraordinary develop- 

 ment. It is horizontal between the coxte and uncinately produced 

 and slightly but evenly decurved, arcuately sinuate above the mucro. 



The mesosternum is more or less oblique and concave. 



The abdominal process is subquadrate, slightly transverse, with its 

 width about equal to the length of the post-coxal part of the first 

 segment, and also to the length of the third ; the second is about twice 

 the length of the fourth. 



The abdominal salient is about a fourth of its width broader than 

 the metasternal process. 



The metasternum laterally between the coxjb is about as long as the 

 width of a mesotibia at middle. 



The tibial grooves of the femora are well developed, with the 

 margins more or less distinctly cariniform. The profemoral grooves 

 are moderately wide, with the sides feebly arcuate or quite straight, 

 the latter becoming contiguous at the femoral base; the anterior 

 margins are quite acutely dentately laminate at the outer third; the 

 floors are nearly flat, opaque, and smooth. 



The mesofemoral grooves have the sides evanescent at about basal 

 fifth, while those of the metafemora become evanescent at basal 

 fourth. The floors of the grooves on both are flat and glabrous. 



The protibia' are feebly compressed and the mesotibia just notice- 

 ably so. The protibia; are distinctly carinate externally; the tarsal 

 grooves are more or less well marked and scabrous; the articidar 

 cavities are nearly always closed. 



The metatibiae are variable in form and carinate to a slight extent 

 the grooves are more or less well marked and at times rather deep, 

 subglabrous, and opaque ; the articular cavities are closed. 



The metatibia' are variable in form and carinate to a slight extent 

 externally in basal fourth; the grooves are more or less obsolete or 

 feeble and the articular cavities are closed. 



The tarsi are more or less variable in length and thickness; usually 

 moderate. The protarsi are about a third of their length shorter 

 than a mesotarsus. Joints two, three, and four are subequal, the 



