58 FAMILIES OF PETALOCERA WHICH LIVE 



Maxilla? laciniis duabus subaqualibus ; apkali membra- 

 nacea, fungosd, margine supero extrorsum rotun* 

 data, interdum minore, processu internet crustaceo, 

 obtuso. 



Palpi maxillares filiformes, labialibus jere triplo longi- 

 ores ; 

 Articulo ultimo aliis longiore, ovali-cylindrico, ad 

 basin paulo graciliore. 



Palpi labiales fere glabri, articidis subglobosis ; 



Articulo tertio aut terminali aliis majore, orbicula- 

 to-ovali. 



Labium minutum, membranaceum, sub-pilosum ; mento oc- 

 cultatum, apice bifidum. 



Mentum crustaceum, subquadratum, versus apicem angus- 

 tius, margine antico emarginato. 



Caput subsemicirculare ; Clypeo sape tuberculato, nun- 

 quam dentato. Corpus ovatum aut ovale, ad api- 

 cem rotundatum, supra, convexiiisculum. Elytra 

 abdomen superne et ad latera obvolventia. Tho- 

 lax transverso-quadratus ; Scutello semper di- 

 stincto. Pedes validi, omnes aque dissiti ; tibiis 

 anticis tridentatis, intus lined impressis pilisque 

 Jimbriatis, 



Observations. 



The Aphodiida differ from the Scarabceidce in having short 

 dilated coriaceous mandibles, and the pairs of feet at equal 

 distance from each other. They are also sufficiently sepa- 

 rated from the Trogidcz, in having their labrum concealed 

 under the clypeus, and by their mandibles being thin, 

 compressed, and scarcely to be called corneous. All the 

 insects known of this family have the scutellum distinct : 



