206 Mr. J. s. Baly on the Phytophaga. 



the thorax. Head rugose, vertex with two acute tubercles placed 

 transversely above the eyes ; antennae about three-fourths the length 

 of the body (including the dilated abdomen) ; thorax strongly rugose, 

 deeply and irregularly excavated, and here and there impressed with 

 deep punctures, dilated portions of the sides slightly sinuate at their 

 base, basal margin notched in the middle, causing it to appear bilobed ; 

 elytra concave, rugose-punctate, their outer border sinuate; abdomen 

 smooth, its sides non-tuberculate. 



Genus Metactcla. 



Corpus oblongum. Caput exsertum, facie trigona; antennis graeilibus, 

 liliformibus, maris corporis longitudini aaqualibus, articulo prime paullo 

 incrassato, secimdo brevi, tertio primi longitudini vix asquali, quarto 

 longiore, rcliquisque longioribus inter se aequalibus aut perparum leniter 

 decrescentibus ; palpis maxil/aribus articulo ultimo conico ; mento trans- 

 verso. TJiorax transversus, lateribus fere rectis. Scutellum trigonum. 

 Elytra thorace latiora, oblonga aut ovata. Pedes subgraciles, sub- 

 elongati ; coxis anticis contiguis, unguiculis appendiculatis. Abdomen 

 fceminm inflatum, ultra elytrorum marginem valde distentum. Meta- 

 sternum breve. 



Type, Metacycla Salle/, Baly. 



Closely allied to the preceding genus, but separated by the slender 

 antennas, the greater development of the metasternum in the female 

 (this part, although short, being considerably longer than iaMeta- 

 lepta), and the appenclicnlated claws. 



Metacycla Sallei. 



M. (mas) subelongata, modice convexa, nigro-coerulea, nitida ; elytris 

 crebre punctatis, obscure caeruleis ; thorace nitido. 



31. (fojm.) abdomine ultra elytra valde superante, ovato-rotundato, lu- 

 rido-marginato. — Long, mas 2|, fa;m. 4 lin. 



Hob. Mexico. 



Antennae equal in length to the body in the male; thorax trans- 

 versely convex, sides slightly rounded, narrowed from the middle to 

 the base, anterior angles produced into an obtuse tooth, surface finely 

 but not closely punctured ; scutellum smooth, trigonate ; elytra much 

 broader than the thorax, oblong, obtusely rounded at the apex, the 

 sutural angle rounded, convex, flattened and slightly depressed on the 

 sutmv in front, surface less closely and coarsely punctured than in 

 the following species ; elytra in the female broader and shorter, each 

 elytron being narrowly ovate, with the sutural margin rather straighter 

 than the other ; on the dish of each are four or five indistinct vitta? ; 

 abdomen very convex, impressed on either side within the lateral 

 border with a vow of large deep foveas, the margin itself obscure rufo- 

 Eulvous. 



