KEVISION OF ELEODIINI BLAISDELL. 397 



Nigr'ma is quite variable in form. There is before me a female 

 that has the form of hunieralh and was for Aears associated with that 

 species, until I examined the genital segment, which revealed its true 

 relationship. An examination of the tibial spurs and punctuation 

 showed that it agreed with the present species. 



Another specimen, a male, has the form of a moderately large 

 glgaiitea^ the pronotum is strongly convex. These two specimens are 

 amphitypes. 



General observations. — The middle lobe of the mentum is more or 

 less triangular and comparatively small ; the lateral lobes much ex- 

 posed and larger; surface finely scabrous and punctate, not notice- 

 ably setigerous. 



The prosternum is generally moderately i:)rotuberant ventrally with 

 the coxa\ convex antero-posteriorly between the same and nuicronate 

 behind, the mucro is more or less subacute, the posterior edge may 

 be vertically truncate. 



The mesosternum is arcuately declivous and more or less concave. 



The nietasternum laterally between the coxa^ is as long as the width 

 of a mesotibia at apex. 



The abdominal j^rocess is quadrate and equal in width to the 

 metasternal salient. 



In the male the post-coxal part of the first segment is equal in 

 length to the second, tw^ce as long as the fourth and a little longer 

 than the third. 



In the female the post-coxal part of the first segment is a little 

 longer than the third; the second twice as long as the fourth and a 

 little longer than the post-coxal portion of the first. 



The profemora are moderately clavate and usually feebly com- 

 pressed; the tibial grooves have flat floors, their margins more or 

 less asperulate, the anterior somewhat arcuately laminate for a short 

 distance internal to the apical sinuation ; the margins converge to 

 base. The mesofemora are not clavate, but somewhat parallel sided; 

 the grooves as on the profemora. but a little narrower and with the 

 margins contiguous at basal fourth. 



The metafemora have the superior and inferior surface lines sub- 

 parallel, grooves as on the mesofemora and with the margins evanes- 

 cent at basal third. 



The tarsal grooves on the tibia' may l)e more or less indicated and 

 asperately sculptured ; the protibiiie are more or less distinctly cari- 

 nate externally in basal two-thirds; the articular cavities are closed. 



The tarsi are variable in length and stoutness. 



The relative lengths of the joints in each tarsus are apparently as 

 in Melaneleodes, where the test was fully applied. 



