170 I\Ir. G. J. Arrow on the 



related to tlie type. Both sexes of this species arc repre- 

 sented ill the British Museum, and I here describe it as 



Ancognai ha falsa, sp. n. (PI. IV. fig. 10.) 



Pallide testacea, clypei margine, xxtriusque lateris elevatione parva 

 verticeque extreme, elytrorum utrinque maculis postscutellari et 

 humerali genubusquo nigris : supra nitidissima, capita subopaco, 

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

 antice paulo angustato, elytris obsolete lineato-punctatis ; pygidio 

 parcissime punctato ; utriusque sexus tarsis brevibus : 



c? , pedum anticorum ungue majori apice minutissime lisso ; 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, capita toto infuscato, 

 elytris antice nigro-maculatis, macula nigra postice ad marginum 

 interiorum et exteriorum medium producta, tibiis extus tarsisque 

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

 nate ; protboraco scutolloque vix punctatis, illiua lateribus a 

 basi arcuatim approximatis, angulis posticis parum rotundatis ; 

 elytriis parcissime punctatis ; metasterno deuse, pygidio abdo- 

 mineque parcius fulvo-hirtis. 



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



Hab. Guatemala : San Marcos (El Rincon). 



The sharp-pointed clypeus, falciform mandibles, and very 

 convex prothorax of A. ■i-punclala are wanting in this species 

 as in A. falsa. It is very like the latter, but difters 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 jutcr 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.j was placed in the now- 

 restricted genus Ancoiinatha on account of the clypcus, and 

 Avas attribntcd by Bunncister to Mexico. It is a Brazilian 

 species taken at Ega l)y Bates. 



