358 Linnean Society. [Feb. 1, 



Read a paper entitled " Descriptions of some new species oiAthy- 

 reus, MacL., a genus of Lamellicorn Beetles." By J. O. Westwood, 

 Esq., F.L.S. &c. 



After tracing the history of the genus and its affinities, and no- 

 ticing in detail its most remarkable peculiarities, dwelling par- 

 ticularly on those characters Avhich are externally indicative of di- 

 stinction of sex, Mr. Westwood proceeds to describe the following 

 species : 



1. Athyreus gigas, Hope; castaneus, elytris magis rufis, capite glabro 

 antice 3-cornuto, mandibulis magnis externe acute dentatis, pronoto 

 utrinque excavatione profunda discoque cornubus duobus crassis acutis 

 divergentibus, elytris lenuissime striato-punctatis. — Long. corp. unc. 1 

 (mandibulis inclusis). 



Hab. in Brasilia. In Mus. D. Hope. 



2. Athyreus armatus, Hope ; piceo-niger, lateribus protlioracis mandi- 

 bulis pedibusque rufescentibus, mandibulis magnis singula extiis 2- 

 dentata dente antico magno, pronoto utrinque carina deflexa medio- 

 que cornu suberecto, elj'tris elevato-striatis. — Long. corp. lin. 9. 



Hab. in America meridionali. In Mus. D. Hope. 



3. Athyreus subarmatus, $ ; supra obscums nigricans, labro mandi- 

 bulis prothoracis lateribus pedibusque piceo-rufis, tenuissime granu- 

 losus, clypeo margine antico parum reflexo postice carina elevata in 

 medio tuberculo instructo, antennis luteis, pronoto carinis duabus bre- 

 vibus mediis in spatio medio ovali linea elevata circumcincto instructo. 

 — Long. corp. lin. Si. 



Hab. in America meridionali. In Mus. D. Hope, sub nomine A. arma- 

 tus, ?. 



4. Athyreus tuberculatus, Hope; obscure piceus, sub lente tenuis- 

 sime granulosus et setosus, antennis luteis, clypeo conico antice cornu 

 pariim elevato terminato, pronoto tuberculis duobus contiguis ante 

 medium disci positis, elytris sublineatis, tibiis anticis 5-6-dentatis. — 

 Long. corp. lin. 8i. 



Hab. in Brasilia. In Mus. D. Hope. 



5. Athyreus rotundus, Hope ; supra obscurus piceo-rufus, sub lente 

 undique tubei'culis minimis obsitus, clypeo margine antico truncato 

 et parum elevato margine postico carina tuberculis tribus acutis in- 

 structo, pi'onoto tuberculis duobus contiguis ante medium elytrisque 

 Iseviter striatis. — Long. corp. lin. 10. 



Hab. in Brasilia. In Mus. D. Hope. 



This insect Mr. Westwood thanks to be probably the female of 

 A. tuberculatus. 



6. Athyreus bellator ; piceo-niger, capite et pronoto (marginibus ex- 



