LYBAS. 95 



Mycophtliorus melanocerus. 



Jlfi/cophfliorus melanocerus, Lac. Erot. 193. 



Cayenne. 



Under-side coarsely punctate. 



Mycophtliorus pauperculus. 



My co\-)liihorus imuper cuius, Lac. Erot. 19 4. 



Columbia, Ega, St Paulo (Bates). 



Thorax nearly smooth, base sinuate, sinuation with several 

 deeply impressed punctures ; elytra with interstices liardly punctu- 

 late \ under-side smooth. 



Lybas. 



Bej. Cat. 453 {fyp. normalis, Lac). 



The characters of this genus are difficult to define ; the first 

 section with produced lobe to the thorax seems sufficiently distinct, 

 especially as L. luciclus is not intermediate but is nearly allied to 

 Mycotretus; the second section has a double punctuation on the 

 thorax, but some of the species are uncertain. 



A. Thorax produced behind, covering the scutellum in part 

 (Hemiaspis, Lac). 



Lybas bicolor. 



Brachymerus hicolor, Guer. R. Z. 1841, 153. 



Lyhas — , Lac. Erot. 230. 



Bolivia (Guerin). 



The type (which is now before me) is pretty clearly punctate- 

 striate, the elytra with the apex narrowly red, the head deeply 

 impressed in front, the sides of the metasternum punctate, botli 

 coxal lines visible. The specimens from Venezuela accord better 

 with Lacordaire's description, having no visible stride or punctures 

 and the elytra entirely black. 



Bates found specimens at S. Paulo and Ega, of which some 

 have the elytra entirely black and the head less impi-essed, the 

 others having the external margin and apex of the elytra red ; 

 Buckley sent 2 specimens from Ecuador, exactly alike in sculjiture, 

 one having the elytra black, the other red at the apex ; hence for 

 the present I have left all these forms under one specific name. 



Lybas ferrugineus. 



Erotylus ferrugineus, Oliv. Enf. v. 482, T. iii. f. 34. 



Lybas , Lac. Erot. 230. 



Cayenne. 



Very like a pale form of L. hicolor, but with a much more 

 Btrongly punctured abdomen. 



