and of uncliaracterized species of Halticinm. 289 



than half the length of the body, the five lower joints 

 fulvous, the rest piceous; the second moderately thick- 

 ened, oval, more than three-fourths the length of the first, 

 scarcely shorter than the third. Thorax nearly twice as 

 broad as long ; sides rather broadly margined, straight 

 and parallel, slightly sinuate just behind the anterior 

 angle, the latter obliqiiely truncate ; basal margin slightly 

 bisinuate on either side, narrowly margined ; upper 

 surface nitidous, finely but distinctly punctured. Elytra 

 much broader than the thorax, oblong-ovate, slightly 

 attenuated at the apex ; convex, transversely depressed 

 below the basilar space, the latter on each elytron dis- 

 tinctly raised ; regularly punctate-striate, interspaces 

 plane, slightly convex towards the apex and on the outer 

 disk, smooth and shining, sparingly impressed with 

 minute punctures, the interspaces next the suture more 

 closely punctured. 



Systena c^ruleata, 



Elongata, convexa, nitida, subtus nigra, pedibus pallide 

 piceis, posticis obscurioribus ; supra obscure c^erulea, an- 

 tennis fulvo-piceis, extrorsum piceis ; thorace transverse, 

 distincte punctate ; elytris oblongo-ovatis, convexis, sat 

 fortiter punctato - striatis, interspatiis l^vibus, remote, 

 minute punctatis, externis convexiusculis. 



Long. 1| lin. Hub. — Amazons, Para ; Santarem. 



Head exserted, vertex and front convex, finely and 

 remotely punctured, the latter separated from the lower 

 face on either side by an oblique groove ; encarpje oblique, 

 not contiguous, naiTowly oblong ; carina strongly raised, 

 oblong, its apex obtuse ; antennae half the length of the 

 body, ]3iceous, the third to the fifth joints paler than the 

 rest. Thorax nearly twice as broad as long; sides straight 

 and parallel, all the angles thickened ; the anterior ob- 

 liquely truncate, the hinder ones acute ; basal margin 

 slightly sinuate on either side the medial lobe, the latter 

 scarcely produced, obtusely truncate ; upper surface trans- 

 versely convex, distinctly but finely and remotely punc- 

 tured. Scutellum trigonate, its apex acute. Elytra much 

 broader than the thorax, oblong-ovate, convex, the con- 

 vexity gradually increasing from the base to beyond the 

 middle ; strongly and regidarly punctate-striate, the inter- 

 spaces shining, sparingly impressed with very fine punc- 

 tures, interspaces on the outer disk slightly convex. 



