94 



PROCEEDINGS OF THE NATIONAL MUSEUM 



The type specimens of M. rufimanus LeConte, M. moerens LeConte, 

 and AI. ruficornis LeConte are in the LeConte collection housed in the 

 Museum of Comparative Zoology and it has not been my good fortune 

 to have the opportunity of examining them. The present where- 

 abouts of the type specimen of M. californicus Reitter is a matter of 

 doubt, for I am informed that it is not in the Hungarian National 

 Museum in Budapest as presumed by Parsons. However, a cotype 

 of M. rufimanus LeConte is in the British Museum (Natural History), 

 and examination of this specimen has served but to strengthen my 

 conviction of its identity with mutatus. 



Among these various trivial names, priority attaches to the epithet 

 rufimamis, and under this name the characters distinguishing the 

 species from the Palaearctic M. aeneus may now be considered. 



Character 

 Upper surface 



Head and pronotuiu 



Eyes 

 Antennal club 



Pronotal punctures 

 Middle and hind tibiae 

 Ovipositor 



Aedeagus 



M. rufimanus LeConte 



Slightly less shining, with 

 metallic reflection almost 

 entirely limited to elytra. 

 Black, rarely showing 

 slight greenish reflection. 



Larger, anterior extremi- 

 ties separated by about 2 

 diameters. 



Distinctly broader and 

 more circular, about three- 

 fourths as wide as long; 

 approximating that of 

 M. viridescens Fabricius. 

 Very slightly coarser, and 

 closer, being separated by 

 1-1}^ diameters. 

 Usually somewhat broader 

 with outer edge more 

 evenly rounded. 

 As in figure 77, a, with apex 

 blunter, the coxites dis- 

 tinctly broader in propor- 

 tion to their length. Apex 

 concolorous or only 

 slightly darker. 

 As in figure 77,b-e, with 

 both lateral and median 

 lobes more broadened 

 towards the apex. 



M. aeneus Fabricius 



More shining, with me- 

 tallic reflection from en- 

 tire upper surface. 

 Concolorous with elytra 

 though usually slightly 

 darker, very seldom pure 

 black. 



Slightly smaller, separated 

 in front by about 2}^-2}^ 

 diameters. 



Distinctly narrower and 

 elongate, about two-thirds 

 as wide as long. 



Slightly finer, separated 

 by l}^-2 diameters. 



Usually less broadened 

 and outer edge less evenly 

 rounded. 



As in figure 77, f, with apex 

 much more acute, the cox- 

 ites narrower. The ex- 

 treme apex distinctly 

 piceous. 



As in figure 77,g-j, with 

 median lobe almost paral- 

 lel-sided, scarcely broad- 

 ened near the apex; the 

 tegmen feebly broadened. 



