E. STEINHEIL E P. STROBEL. 869 



Fra Mendoza e San Luis; marzo 1866. 

 158. Horistonotus castaneus, nova species. 



H.caslaceus, nitidus, leviter fulvo-pubescens; thorace inflato, ely- 

 trorum latitudine, post medium latissimo, caput instar punctis crassis 

 tenuibus ocellalis instructo et praelerea sublilissime punctulato, infra 

 angulos postieos plicato; scutelli medio pallide rufo; elytris punctato- 

 striatis, interstitiis sublilissime punclulatis; antennis, pedibus elytror- 

 cumque basi testaceis; unguibus simplicibus. Long. lin. 2. 8; lat, 

 lin. 0. 6. 



Chilecito presso San Carlos; gennajo 1866. 

 189. Ethesopus humeralis, nuova species, 



E. delinitóri Cand. simillimus, niger 5 nitidus, tenuiter flavo-pube- 

 scens; prothorace longitudine Iatiore, basini versus angustato, angu- 

 lis posticis divaricatis, angulis anticis scutellique medio caslaneo ru- 

 fis; thoracis disco sparsim subliliter punctato; elytris punclato-slriatis, 

 macula oblonga huinerali castaneo rufa, stria suturali in posticem 

 versus profundiore; ore, antennis pedibusque testaceis. Long. lin. 1.8; 

 lat. lin. 0. 5. 



Salvador presso San Luis; dicembre 1865. 



160. Cosmesus obtusipennis, nova species. 



C.fuscus, pilis recurvatis flavo pubescens; capile nigro, conferlis- 

 sime punctato, vertice foveolato; thorace subparallelo, latitudine 

 dimidio longiore, undique, praecipue lateribus, late testaceo limbato, 

 angulis posticis testaceis valde divaricatis, leviter carinatis, ad margi- 

 nem posticum qualuor foveoìis nitidis impressis; elytris thoracis la- 

 titudine in angulis posticis, latitudine ultra duplo longioribus, fusco- 

 ochraceis, parallelis usque ad 2 / 3 longiludinis, in apicem versus an- 

 gustalis et hic singulatim rotundatis, striato punctatis, interstitiis sub- 

 convexis, punctalis; ore labroque rufo-testaceo; antennis pedibusque 

 flavis, antennarum arliculis 2-11 basi infuscalis. Corpore subtus fusco, 

 abdominis apice rufo-teslaceo. Long. lin. 2. 7; lai. lin. 0. 8. 

 Buenos Aires. 



161. Ptilodactyla pallida, nova species. 

 P.oblonga-ovaliSj fusco testacea, antennis, palpis pedibusque palli- 



dioribus ; capite paulo convexo, densissime punctulato; thorace lon- 



