R.UTELINJE 5 



between the coxae than in the inconstans type and with the surface 

 somewhat more convex, but it does not have a trace of the peculiar 

 tumidity and amalgamation with the metasternum seen in Spilota, 

 and cupricottis, included under group 2 by Mr. Bates, is truly a 

 Spilota and in no way allied to cincta in the structure of the 

 mesosternum. With a moderate series of the Mexican species 

 at hand, I can therefore find no evidence that Spilota is not a valid 

 genus. 



The following work relates primarily to the species of America 

 and Canada, but the opportunity is taken to make known a few 

 Mexican and Central American species, believed to be new; these, 

 as usual, will be indicated by the prefixed asterisk. 



Rhombonalia n. gen. 



The small narrow ligula, with narrowly arcuato-truncate apex 

 and small, transverse, scarcely at all impressed labrum, in connec- 

 tion with the very obtusely rounded anterior thoracic angles, 

 narrowly subparallel form of the body, generally feebly sculptured 

 elytra and simple tarsal claws, indicate a true genus, not very 

 closely allied to Anomala, that is, at any rate, to the American 

 species of Anomala, which, as a group, Ohaus shows are rather 

 radically different from the European in the structure of the male 

 sexual characters and they also differ in habitus to some extent. 

 The clypeus also differs markedly from that of Anomala, being 

 much narrower and more elongate, with the apex gradually much 

 reflexed, the surface sloping downward from the plane of the front, 

 from which it is separated by a tumid transverse suture in all 

 the normal species. Anomala camancha Wick., having an impressed 

 clypeal suture and transverse clypeal apex, with stronger elytral 

 sculpture, is doubtfully a member of the genus, though having 

 simple tarsal claws; the author does not describe the mouth-parts 

 or the form of the thoracic angles. It is said by Schaeffer that the 

 Mexican carinifrons of Bates, which is truly a member of the 

 genus, occurs in Arizona; I have not seen it but transcribe the origi- 

 nal description below. The species are as follows: 



Clypeal suture feebly cariniform, the plane of the clypeus slightly de- 

 clining 2 



Clypeal suture impressed, straight, not at all cariniform 6 



2 Sides of the prothorax parallel or converging toward base, the basal 

 angles very obtuse 3 



