328 Mr. C. O. Waterhouse's descriptions of nciv 



ante apicem nigra; abdomiue flavo nigro-guttato ; tlbiis 

 posticis basi flavescentibus. 



Long. 6h lin. 



This variety differs from the Mexican examples of tri- 

 partitus in having a large black spot or transverse band 

 a little before the apex of the elytra, instead of having the 

 whole apical half of them black. 



Hab. — Guatemala. 



Chauliognathus distinguendus, sp. n. 



Niger, subopacus ; thorace flavo, medio nigro ; elytris 

 fiavis, macula scutellari, plagaque subapicali nigris. 

 Long. 7 lin. 



Head not very long, obliquely narrowed behind the eyes, 

 oblique narrowed in front of the antennae ; mandibles yelloAv 

 on their outer margin. Thorax yellow, opaque and black 

 on the disk, reflexed at the sides, the anterior angles 

 rounded, the sides scarcely arcuate, the posterior angles 

 distinct, but very obtuse, the base oblique on each side, 

 gently emarginate in the middle. Elytra yellow, scarcely 

 as broad as the thorax at the base, a little broader in the 

 middle, narrower at the apex, each elytron Avith a black 

 spot at the scutellum, and a large subapical triangular 

 black patch, which nearly unites with the corresponding 

 spot on the other elytron. 



Hah. — Guatemala. 



Var, Each elytron with a round black subapical spot 

 close to the suture. 



Chauliognathus distinguendus, var. ? 



Niger, subopacus, pubescens ; thorace flavo, guttis qua- 

 tuor nigris ; elytris flavis, basi maculisque duabiis rotun- 

 datis post medium nigris ; abdominis segmentis anguste 

 flavo-marginatis. 



Long. 8 lin. 



Head not very long, narrowed in front of the antennje, 

 obliquely narrowed behind the eyes. Thorax yellow, one 

 quarter broader than long, rather strongly reflexed at the 

 sides, anterior angles much rounded, the front and sides 

 gently arcuate, the base oblique on each side, emarginate 

 in the middle. Elytra at the base a little broader than 

 the thorax, a little broader in the middle, narrower again 

 at the apex, yellow, dull, finely pubescent, the base black ; 



