4 MEMOIRS ON THE COLEOPTERA 



Hind tibiae not constricted apically 8 



8 Humeral callus of the elytra strongly denned and well exposed by the 

 narrower prothorax, the hind body generally rather tapering from 

 the base; clypeus flat, transversely trapezoidal; mesosternum tuber- 

 culate between the coxae; hind tibiae rather long, only feebly broaden- 

 ing from the base. North and South America 9 



Humeral callus more diffuse and less exposed basally, the hind body 

 shorter and quadrate; mesosternum narrow and not tumid between 

 the coxae 10 



9 Elytra with numerous deep subequal sulciform striae; body moderate 

 in size. [Type 5. sulcipennis Burm.] Strigoderma 



Elytra with few feebler, less defined and less regular striae; body very 

 small in size. [Type Melolontha pygmcea Fabr.]. . . Strigodermella 



no Hind tibiae very short and stout, strongly obconic in form; clypeus 

 as in the preceding, flat and trapezoidal; prothorax distinctly nar- 

 rower than the elytra, the latter rather feebly and somewhat irregu- 

 larly striate. Texas and adjoining parts of Mexico. [Type A. par- 

 viceps n. sp.] Alamona 



-Hind tibiae of normal length, subparallel, sometimes much stouter in the 

 male than in the female; clypeus short, more or less concave, roundly 

 dilated at the sides; prothorax large, not notably narrower than the 

 elytra, the latter strongly and somewhat unevenly punctato-striate 

 as in many sections of Anomala. Mexico and Central America. 

 [Type Anomala (Phyllopertha) mexicana Burm.]. . . . *Epectinaspis 



II Body elongate-oval as in Lamoana, shining, partially metallic, 

 glabrous above, coarsely pubescent beneath, the prothorax large, 

 convex, the elytra short, quadrate, with scarcely impressed rows of 

 rather coarse punctures; mesosternum tumid between the coxae; 

 hind tibiae elongate, flattened and subparallel. Mexico. [Type 

 C. metallescens Blanch.] *Callirhinus 



Anomala villosella Bl. is a difficult species to deal with taxonom- 

 ically. It was assigned to Anomala by Bates, although the ascend- 

 ing mesosternal epimeron was recognized and in reality it is here 

 as marked a feature as in Strigoderma; this structure is not by any 

 means so evident in the species associated with villosella by Mr. 

 Bates. I think, viewing the subject from all sides, that villosella 

 should therefore form the type of a separate genus as defined above. 

 Phyllopertha Steph. is omitted from present consideration; the type 

 is palaearctic and no American allied forms are at hand; probably 

 no American species belongs to the genus, strictly speaking, not 

 even excepting the Mexican Phyllopertha tolucana of Bates. 



The grouping of the Mexican Anomala species adopted by Bates 

 might lead one to suppose that group 2 was in fact intermediate 

 between Spilota and the normal type of Anomala, but I do not find 

 this to be the case. The mesosternum in cincta is truly broader 



