360 LAMELLICORNIA. 



other character of importance. I therefore do not venture to adopt Thomson's genus 

 Melasictes, the chief justification of which lies in this character, although the descrip- 

 tion does not point it out. 



The genus seems to be peculiar to Central America and the northern parts of South 

 America. 



1. Amithao albopictus. (Tab. XXII. fig. 17.) 



Amithao albopictus, Van de Poll, Notes from the Leyd. Mus. viii. p. 233 l . 

 Hab. Panama 1 , Chiriqui (Trbtsch). 



2. Amithao cavifrons. (Tab. XXI. fig. 9.) 



Cotinis cavifrons, Burm. Handb. der Ent. iii. p. 263 \ 



Hab. Mexico \ Toxpam, Cordova (Salle), Misantla (Edge), Atoyac in Vera Cruz 

 (H. H. Smith) ; Nicaragua, Chontales (Belt, Janson). 



A good series of examples. In both sexes the sides of the crown and forehead and 

 the apex of the bidentate clypeus are more elevated than in A. albopictus, and the pit 

 in front of the tubercle is broad and deep. 



3. Amithao haematopus. (Tab. XXI. fig. 11.) 



Stethodesma haematopus, Schaum, Trans. Ent. Soc. Lond. v. p. 68 \ 

 Desicasta haematopus, O. Janson, Cist. Entom. iii. p. 147 2 . 



Hab. Mexico 1 (Salle) ; Nicaragua, Chontales (Belt, Janson 2 ). 



Two examples, males, perfectly similar. The centre of the forehead is very feebly 

 convex, and slopes in front into a small but deepish pit near the triangular emargination 

 of the clypeus ; the latter is strongly bidentate and scarcely renexed. 



4. Amithao thomsoni. 



Desicasta Thomsoni, O. Janson, Cist. Entom. ii. p. 302 \ 

 Hab. Panama 1 . 

 Described as allied to A. haematopus. Not contained in our collections. 



5. Amithao metallicus. 



Desicasta metallica, O. Janson, Cist. Entom. iii. p. 146 \ 



Hab. Costa Rica 1 (Van Patten); Panama, Volcan de Chiriqui 4000 to 6000 feet 

 (Champion), Veragua 1 . 



6. Amithao pyrrhonotus. (Tab. XXII. fig. 18.) 



Gymnetis pyrrhonota, Burm. Handb. der Ent. iii. p. 267 1 . 

 Hab. Mexico 1 , Mirador (Salle), Cordova (Hoge). 

 Closely allied to A. haematopus and similar in form and size (26-28 millim.), but the 



