MACROPOIDES.— HETEKOSTEKNUS. 287 



1. Macropoides nietoi. (Tab. XVI. fig. 20, $ .) 



Macropoides nietoi, Guerin, Rev. Zool. 1844, p. 259 ; Lac. Gen. Col., Atlas, t. 34. fig. 2, <$ \ 

 Hab. Mexico \ Cordova (Salle) ; Nicaragua, Chon tales (Janson). 

 A female specimen from Cordova is figured. 



2. Macropoides mniszechi. 



Macropnus mniszechi, Salle, Rev. et Mag. Zool. 1873, p. 14, t. 10. figg. 1-1 e 1 . 

 Hab. Mexico, Toxpam near Cordova 1 (Salle, exempl. typica). 



The clypeus is rather longer and more narrowed than in M. nietoi, and rather 

 deeply notched at the apex. The species is perfectly congeneric with M. nietoi. 



3. Macropoides crassipes. 



Macropnus crassipes, Horn, Proc. Acad. Phil. 1866, p. 397; Trans. Am. Ent. Soc. i. t. 3. fig. 7 1 . 

 Hab. Honduras 1 . 



The incomplete and inaccurate description of Macropoides given by Guerin and 

 Lacordaire, the latter by placing it near the Pelidnotce and leaving it to be inferred that 

 it has the same characters as that group, led Dr. Horn to institute the genus Macropnus 

 on a large species from Honduras, which he informs me he now believes to be congeneric 

 with M. nietoi. The species is not represented in our collection. 



4. Macropoides (?) ? 



Hab. Nicaeagua, Chontales (Belt). 



A single example of a species probably belonging to this genus, but being a female 

 it is not possible to refer it with certainty. 



HETEKOSTEKNUS. 



Heterosternus , Dupont, in Guerin-'s Mag. Zool. 1832, Ins. t. 10; Burmeister, Handb. der Ent. iv. 

 1, p. 411; Lacordaire, Gen. Col. hi. p. 360. 



Two species only are known of this genus, remarkable for its elongate form and the 

 great length of the hind legs in the male with greatly elongated tibise. The postpectus 

 and condyles of the hind coxse are still more strongly developed and protuberant than 

 in Chrysina macropus ; but the coxal plate is much widened towards the supports of 

 the femora, which latter are extremely elongated and of uniform width. The clypeus 

 and mandibles are shaped almost exactly as in Macropoides nietoi. In the female the 

 epipleurse terminate at the level of the hind coxse, where the elytra are angularly dilated, 



