170 Mr. G. J. Arrow on the 



related to the type. Both sexes of this species are repre- 

 sented in the British Museum, and I here describe it aa 



Ancognatha falsa, sp. n. (Ph IV. fig. 10.) 



Pallide testacea, clypei margiiie, utriusque lateris elevatione parva 

 verticeque extreme, elytrorum utrinque maculis postscutellari et 

 huinerali genubusque nigris : supra nitidissima, capite subopaco, 

 rude punctate, prothorace parce et minute punctate, baud lato, 

 antice paulo angustate, elytris obsolete lineato-punetatis ; pygidio 

 parcissime punctate ; utriusque sexus tarsis brevibus : 



S , pedum anticorum ungue majori apice minutissime fisso ; pygidio 

 parce fulvo-birto : 



5 , elytrorum lateribus baud dilatatis. 



Long. 17-23 mm. 



Hab. Mexico : Peras, Capulalpam, Mexico City. 



Although he did not record the locality_, Bates also united 

 with A. 4<-punctata a specimen from Guatemala of another 

 species allied to A. falsa. This is here described from 

 examples of both sexes. 



Ancognatha sellata, sp. n. 



Longe ovata, postice sat lata, testacea, polita, capite toto infuscato, 

 elytris antice nigro-maculatis, macula nigra postice ad marginum 

 interiorum et exteriorum medium products, tibiis extus tarsisque 

 nigris ; capite leviter minute punctato, clypeo longo, vix acumi- 

 nato ; protborace scutelloque vix punctatis, illius lateribus a 

 basi arcuatim approximatis, angulis posticis parum rotundatis ; 

 elytriis parcissime punctatis ; metasterno dense, pygidio abdo- 

 mineque parcius fulvo-hirtis. 



Long. 18-24 mm. ; lat. max. 10-12 mm. 



Hah. Guatemala : San Marcos (El Rincon). 



The sharp-pointed clypeus, falciform mandibles, and very 

 convex prothorax of A. 4<-punctata are wanting in this species 

 as in A. falsa. It is very like the latter, but differs by the 

 black head and large black patch occupying the anterior 

 part of the elytra and produced to about the middle of the 

 inner and outer margins. The sides of the thorax are less 

 strongly rounded and the hind angles more marked. The 

 two sexes are similar, the pygidium being thinly hairy in 

 both. 



Cyclocephala ocellata, Burm., was placed in the now- 

 restricted genus Ancognatha on account of the clypeus, and 

 was attributed by Burmeister to Mexico. It is a Brazilian 

 species taken at Ega by Bates. 



