(EDIONYCHIS. 409 



it is therefore doubtful whether the following species is specifically distinct from 

 (E. ceracollis. 



3. (Edionychis mexicana. 



(Edionychis mexicana, Harold, Col. Hefte, xv. 1876, p. 121 \ 

 Hab. Mexico 1 , Oaxaca, Cuernavaca, Durasnal, Peras (Salle). 



Differing from the preceding species in having the breast black and the thoracic 

 angles not mucronate. 



4. (Edionychis icteridera. (Tab. XXIII. fig. 12.) 



(Edionychis icteridera, Harold, Col. Hefte, xv. 1876, p. 122 1 ; Chevr. Dej. Cat. 3rd edit. p. 408. 



Hab. Mexico \ Etla, Durasnal, Oaxaca (Salle), Jalapa (Edge) ; Guatemala, Aceytuno 

 (Salvin). 



According to Yon Harold (E. icteridera differs from (E. mexicana in the mucronate 

 anterior angles of the thorax and the smooth elytra. In (E. mexicana the entire 

 abdomen is testaceous, this colour being confined to the apex and sides only in the 

 allied species. I have, however, specimens before me which may be referred to either 

 species ; the mucronate thorax does not seem to be a constant character ; nor is the 

 punctuation of the elytra always the same, as specimens occur extremely finely punc- 

 tured, and others smooth, which are, however, wanting in the other characters supposed 

 to belong to them. I therefore much doubt the specific distinction of the two insects. 

 Two specimens obtained in Guatemala by Mr. Salvin have the elytra more distinctly 

 punctured, but agree in other respects ; the specimens obtained by Herr Hoge are of a 

 more greenish tint, and the amount of piceous on the underside is very variable. 



5. (Edionychis acutangulus. (Tab. XXIV. fig. 2.) 



Fulvous ; the anterior angles of the thorax strongly produced, the disc impunctate ; elytra violaceous-blue, 

 finely punctured ; tibiae obscure piceous. 



Length 4-5 lines. 



Head entirely fulvous, with a few fine punctures, the frontal tubercles bounded behind by a deep groove ; 

 antennae half the length of the body, black, the three first joints fulvous, the third and fourth joints equal in 

 length ; thorax about three times as broad as long, the sides strongly rounded, flattened in front of the 

 lateral margin, the anterior angles produced into a rather long and acute tooth, directed outwards, the 

 surface impunctate ; scutellum black ; elytra scarcely widened behind the middle, dark metallic blue, the 

 punctuation fine, rather close, but not confluent ; underside and legs fulvous, the tibiae slightly darker. 



Hab. Mexico, Cuernavaca (Salle); Guatemala (coll. Jacoby). 



This is a species of large size, and although closely allied to (E. icteridera and 

 (E. mexicana, evidently quite distinct therefrom by the entirely fulvous head and the 

 very strongly dentate anterior angles of the thorax, which is especially evident in the 

 Guatemalan specimen. The punctures of the elytra are also very fine and well 

 separated, the interstices being flat. 



biol. centk.-amek., Coleopt., Vol. VI. Pt. 1, January 1886. 3 g 



