KEVISION OF ELEODIINI BLAISDELL. 205 



present in the external fourth; their margins are rapidly evanescent; 

 when the grooves reach the middle of the femora the margins are 

 about contiguous. 



The protibia" are more or less distinctly carinate externally, slightly 

 compressed, and the external surface line is more or less arcuate from 

 apex to base; the articular cavities are open, but less so than in the 

 other members of the group, and the tarsal grooves are poorly defined, 

 usually scabrous, sometimes more or less glabrous. The articular 

 cavities of the meso- and metatibise are nearly or quite closed. The 

 external surface of the mesotibia* is more or less flattened and more 

 or less feebly grooved, scabrous, scarcely ever glabrous except near 

 the apex. 



The metatibia3 are scarcely flattened or grooved externally, 

 although they are at times, the surface is scabrous. The mesotibiae 

 are sometimes feebly and briefly carinate at base. 



The tarsi appear to be variable in stoutness without relation to 

 the size of the specimen; they are slightly more elongate than in the 

 other species of the group. 



A protarsus is about one-third of its length shorter than a mesotar- 

 sus. The first four joints are short and subequal, the first slightly 

 the longest, the others wider than long; the fifth is about equal to 

 the preceding three taken together. 



A mesotarsus is but slightly shorter than a metatarsus. Joints 

 two, three, and four are subequal and a little longer than wide, taken 

 together longer than the fifth; the first is scarcely equal to the next 

 two combined. 



The metatarsi are just a little more than one-half as long as their 

 respective metatibia. Joints two and three are subequal and dis- 

 tinctly longer than wide, and together equal in length to the first 

 and fourth individually. 



GRANDICOLLIS Group. 



The single species constituting this group has been the only disturb- 

 ing element thus far met with in the study of the present subgenus. 



It is without doubt intermediate between the Obscura and Dentipes 

 groups, or to be more exact between obscura and dentipes themselves. 

 At first I was inclined to treat it as a subsection of section B of the 

 Dentipes group. In that position it was completely isolated and far 

 from being a contributing member to the harmony exhibited by the 

 other species. 



In the smooth and shining integuments it is allied to the Dentipes 

 group ; its large size, oblong form, broadened tibial spurs, and oblique 

 abdomen of the male show strong affinity with the Obscura group, 

 while the obsolete humeri make it a unique element in the subgenus. 



