276 Mr. J. S. Baly on the Phytophaga. 



serted, narrowed behind the eyes, but not consti'icted into a regxJar 

 neck ; eyes slightly prominent ; antennae filiform, robust, equal in length 

 to the body, third joint shorter than the fourth, all the joints steel-blue 

 above, obscure fulvous beneath, five or six basal joints nitidous, the 

 rest opake ; face impressed with a deep triangular fovea, the apex of 

 which extends upwards to the vertex, the latter marked with a short 

 black vitta, apex of jaws black. Thorax transverse, sides roimded, 

 naiTowed and sinuate behind, anterior and posterior angles produced 

 into a short obtuse tooth, disk impressed here and there with deep 

 punctures. Elytra broader than the thorax, oblong, parallel, their apex 

 regularly roimded, the entire lateral and the apical portion of the 

 sutural borders thickened ; surface of each elytron covered with rows of 

 punctm-es, deeply impressed and regular at the base, less distinct and 

 less regular towards the apex of the elytron. 



Genus Megascelis, Latr. 

 Mecjascelis elegans. 



M. elongata, subcylindrica, dorso vix depressa, flava, nitida, vix pubescens ; 

 antennis (medio excepto) albis ; capite, antennarum articulis intermediis 

 tibiisque posticis extus, nigris ; pectore piceo-seneo ; facie inter oculos 

 scutelloque viridi-seneis ; thorace vix elongato, basi et apice paullo 

 angustato, dorso transversim depresso, utrinque sulcatoj elytris sub- 

 parallelis, apicem versus angustatis, singulatim apice concavis, angulo 

 suturali in spinam brevem producto, obscure cseruleo-nigi-is, nietallico 

 violaceo micantibus, medio fascia lata flava instructis ; facie inter oculos 

 rugosa, longitudinaliter canaliculata. — Long. 3f lin. 



Hah. Nauta, Upper Amazons. 



Elongate, pale shining yellow. Head shining black ; face between the 

 eyes and a narrow space on either side the epistome running to the 

 base of the jaws metallic gi'een ; face rugose, longitudinally grooved 

 down the middle, clothed with adpressed silvery hairs; antennae 

 yellowish-white, basal joint above, the entire fifth and three following, 

 together with the extreme apex of the eleventh joint black ; eyes emar- 

 ginate. Thorax scarcely longer than broad, narrowed in front and 

 behind the middle ; above smooth and shining, nearly impunctate, obso- 

 letely clothed with fine hairs ; disk transversely concave, the concavity 

 impressed on either side near the middle with a moderately deep and 

 transverse fossa. Scutellimi broadly truncate, piceous at the base, bright 

 metallic green towards its apex. Elytra much broader than the thorax, 

 sides subparallel, obliquely naiTOwed at their posterior third, the apex of 

 each ehi;ron concavely excavated, sutural angle produced into a short 

 spine, above subcyliudrical, slightly flattened along the suture, impressed 

 just below the scutellum with a shallow common fovea, sparingly clothed 

 with short adpressed hairs, shoulders slightly prominent ; each ehi;ron 

 with two rows of finely impressed punctures, the first abbreviated, all 

 the rows less distinct towards the apex of the elytron ; a thickened 



