(EDIONYCHIS. 425 



difference that the entire apical portion in (E. brunneovittata remains of the testaceous 

 ground-colour; the sides of the thorax are also very much more rounded and not 

 straight near the base, a character which will at once distinguish this species from the 

 allied forms. Ten specimens, agreeing with each other in every particular. 



43. (Edionychis panamensis. (Tab. XXIII. fig. 17.) 



Dark brown ; head and antenna? black ; tborax and elytra testaceous ; elytra very finely punctured, a trans- 

 verse band before and another below the middle, the apex, and a longitudinal stripe at the shoulder, 

 metallic bluish-black. 



Var. The apical spot of the elytra wanting. 



Length 3-4 lines. 



Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 



It is quite possible that this species is only a variety of the preceding, for which I 

 would have at once taken it, had the sixteen specimens before me not shown all the 

 same constant differences ; the pattern of the elytra is in some examples absolutely 

 identical, in others there is an additional apical spot as the figure shows ; but the bands 

 are here always metallic violaceous or bluish-black ; the head, with the exception of 

 the parts of the mouth which are testaceous, is also black, as are the antenna?, and the 

 latter have the fourth joint very distinctly longer than the third, and more markedly so 

 than in (E. brunneovittata. 



44. (Edionychis olivacea. 



Obscure greenish or greenish- testaceous ; third and fourth joints of antennae equal ; elytra closely and distinctly 

 punctured, the base narrowly, a transverse sinuate band before, and another broader behind the middle, 

 obscure fulvous. 



Var. a. Elytra metallic bluish, with an indistinct pale transverse central band. 



Var. h. Elytra obscure greenish-brown, the bands nearly obsolete. 



Length 3|-4| lines. 



Hab. Panama, Bugaba (Champion). 



This is another species very closely allied to (E. brunneovittata and (E. panamensis, as 

 well as to (E. decemguttata ; from the first two it may be distinguished by the much 

 less rounded thorax, the sides of which are straight at the base and have a distinct 

 anterior tooth, and the much stronger punctuation of the elytra ; this latter character 

 and the pale greenish colour separates the species from (E. decemguttata, from which it 

 seems further to differ by the more dentate or sinuate elytral bands, which in many 

 specimens are scarcely visible. I am unable to say whether the present insect is not 

 another variety of (E. decemguttata, the only species of the genus with which, on 

 account of the shape of the thorax, it can be confounded ; but as more than fourteen 

 specimens, all agreeing in the above particulars, are before me, I am obliged to 

 separate (E. olivacea as a distinct species. 



biol. CENTE.-AMEE., Coleopt., Yol. VI. Pt. 1, January 1886. 3 i 



