272 Mr. J. S. Baly on new Phytophagous Insects. 



(Mas.) Elytris apicem versus prope suturam spatio semiovato 

 elevato, minus crebre punctata instructis. — Long. 2f-3 lin. 

 Hah. Ega, Upper Amazons. Collected by Mr. Bates. 



Diabrotica Erichsoni. 



D. fulva, nitida, capite (antennarum articulis quatuor ultimis prseter- 

 missis) nigro ; elytris oblongis, crebre punctatis, snbrugosis, utro- 

 que vittis tribus obsolete elevato, plumbeis, margine lsevi, fulvo ; 

 thorace transverso, disco fortiter transverse bi-impresso, basi uni- 

 foveolato. 



(Alas.) Elytris apicem versus prope suturam carina oblonga 

 nitida instructis, vittis obsoletis, antennarum articulis basalibus 

 subtus fulvis, ultimi apice nigro. — Long, maris 5 lin., foem. 4 lin. 



Hah. Banks of the Napo. 



Diabrotica triplagiata. 



D. supra nigra, nitida, antennarum articulis tribus ultimis flavo- 

 albidis, ultimi apice nigro, articulis ante apicem album nigro- 

 piceis, quinque basalibus subtus fulvis ; thorace transverso-qua- 

 drato, disco transverse excavato, utrinque impresso, lateribus 

 sinuatis, flavo marginatis ; scutello trigonato, apice subacuto ; 

 elytris oblongis, tenuiter subcrebre punctatis, obsolete carinatis, 

 flavis, plaga magna communi subquadrata, a basi ad medium ex- 

 tensa, et utriusque macula postica obscure metallico-olivaceis ; 

 subtus flava, tibiis extrorsum femorumque dorso piceo-lineatis. 



(Mas.) Elytris apicem versus prope suturam, carina brevi ele- 

 vata instructis. — Long. 4-4^ lin. 



Hab. Banks of the Napo. 



This species probably varies in having the posterior patches 

 on the elytra confluent at the suture. 



Diabrotica fraterna. 



D. supra nigra, nitida, thoracis lateribus antennisque flavis, his (ar- 

 ticulis quatuor ultimis exceptis) dorso nigro-signatis ; thorace 

 tranverso, disco transverse fortiter sulcato, ante basin breviter 

 transverse canaliculato, lateribus ante medium ampliatis ; scu- 

 tello elongato-trigonato, apice obtuse truncate ; elytris oblongis, 

 tenuiter crebre punctatis, obscure metallico-olivaceis, limbo exte- 

 riore fasciaque prope medium flavis ; subtus fusca, pedibus obscure 

 fulvis, femoribus dorso, tibiisque extrorsum, nigris. — Long. 4| lin. 



Hab. Banks of the Napo. 



Diabrotica Adonis. 



B. nigra, nitida, antennarum articulis ultimis tribus, thorace trans- 

 verso pedibusque. flavo-albis ; his tarsis, tibiis quatuor anticis fere 

 totis posticisque apice nigris ; elytris oblongis, tenuiter crebre 



