EEVISION OF ELEODITNI — BLAISDELL. 245 



the chain it is between forma Icevis and distans, for the hitter is truly 

 more closely united to gracilis than to the former. 



General observations. — The mentiim is nearly as in gracilis. It 

 is larger and the middle lobe is less f oveate. 



The prosterninn is prominent ventrally with the coxa3, convex be- 

 tween the same and vertically truncate behind, the angle a mucro; 

 sometimes simply with a small mucro and not truncate. 



Mesosternum usually rather vertically declivous and broadly con- 

 cave. 



The abdominal process is subquadrate, slightly transverse, about 

 equal in width to the length of the post-coxal portion of the same 

 segment ; the second segment is slightly more than twice as long as 

 the fourth; the third about a third of its length shorter than the 

 second. 



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

 the metasternal process. 



The metasternum laterally between the coxa? is about equal in 

 length to the width of a mesofemur at base. 



The tibial grooves of the ^^rofemora are rather broad apically, the 

 sides are rather strong and finely scabrous, becoming contiguous a 

 short distance from the base; their floors are more or less concave and 

 smooth. On the mesofemora the grooves are moderate in width ; the 

 sides converge but become obsolete before becoming contiguous, one- 

 fourth from the base. The grooves of the metafemora are narrower, 

 margins rather strong and obsolete at basal third, before becoming 

 contiguous. 



The jorotibia) are quite distinctly carinate externally and slightly 

 arcuate. In the males the base is somewhat constricted. The tarsal 

 grooves behind the carinse are narrow and scabrous; the articular 

 cavities are more or less open. 



The articular cavities of the meso- and metatibi?e are narrowly 

 open or closed. The grooves of the mesotibia? are usually strongly 

 develojoed, concave with the floors, smooth and opaque, margins muri- 

 cately scabrous, and they extend to the basal third. The metatibise 

 are flattened externally and also grooved in apical three-fourths, and 

 the grooves are more or less smooth or asperate at bottom. 



The tarsi are rather stout. The protarsi are about two-fifths of 

 their length shorter than a mesotarsus. Joints two, three, and four 

 short, distinctly wider than long and subequal, together slightly 

 shorter than the fifth ; the first about as long as wide. 



The mesotarsi are about a seventh of their length shorter than a 

 metatarsus. Joints two, three and four subequal and about as long 

 as wide, together about as long as the fifth ; the first is a little shorter 

 than the next two taken together. 



