EEVISION OF ELEODIINI BLAISDELL. 449 



appears to be a structural modification with a function whose analogy 

 is found in the femoral teeth of that subgenus. 



It might have been a wise course to have created a new genus for 

 its reception, but I am opposed to contributing unnecessarily to an 

 increase in the complexity of our terminology when relationships can 

 be understood without it. 



Genet'cd ohservations. — Mentum variable, the middle lobe is rather 

 large, usually rounded anteriorly; many examples have the anterior 

 margin truncate and often distinctly emarginate, with sides arcuate 

 or obliquelv straight ; surface may be feebly and evenly convex, to 

 strongly foveate laterally, Avith a well-marked meridian ridge. 



The prosternum is quite evenly rounded antero-posteriorly between 

 the coxtr and very feebly widened behind the equator of the acetab: 

 Ilia; it is quite prominent ventrally with the coxa^; posteriorly it is 

 vertically and scarcely arcuately declivous. In the series at hand 

 there is not the least sign of a mucro. 



The mesosternum is arcuately declivous and more or less concave. 



The abdominal intercoxal process is comparatively small, sub- 

 quadrate, and equal in width to the length of the post-coxal portion 

 of the same segment, the latter about equal to the length of the third; 

 the second is one-third of its length longer than the third ; the fourth 

 is equal to half the length of the second. 



The abdominal process is one-fifth of its width greater than that 

 of the metasternal salient. 



The metasternum laterallv between the coxa? is short and about 

 equal in length to the width of a mesotibia at middle. 



The femora have their tibial grooves well defined and glabrous, 

 their margins are rather thin and inwardly converging quite to the 

 femoral bases. Those of the profemora have the anterior margins 

 feebly laminate at the usual site of the femoral tooth. 



The external surfaces of the tibia^ are more or less carinatc, most 

 marked on the protibia:^, which are also more or less compressed. 



The tarsal grooves are more or less indicated on all of the tibite, 

 frequently extending two-thirds of their lengths, most strongly de- 

 veloped on the protibia ; frequently the meso- and metatibiaj are 

 simply flattened externally. 



Tarsi variable in stoutness, noticeably so in the larger specimens 

 and somewhat slender in the smaller ones. 



The protarsi are about one-fifth of their length shorter than a 

 mesotarsus. Joint one distinctly longer than the second, the suc- 

 ceeding three about equal in length, just the least longer than wide; 

 the fifth about as long as the preceding three taken together. 



The mesotarsi are about one-tenth of their length shorter than a 

 metatarsus. First joint about one and a half times longer than the 

 second. Ihe latter to the fourtli inclusive subequal and distinctly 

 59780— Bull. 63—09 29 



