620 PHYTOPHAGA. 



M. impunctata is probably a variety of M. irazuensis, with smaller thoracic spots, 

 different elytral pattern, and unicolorous underside ; in all other respects the two 

 insects agree with each other. 



A single specimen, captured on the margin of the lake of Atitlan. 



3. Monolepta bipunctata. 



Testaceous, the intermediate joints of the antennae fuscous ; thorax finely rugose-punctate, obsoletely spotted ; 

 elytra closely and finely punctured, a spot at the middle, near the lateral margin, and another near the 

 apex of each, black. 



Length 2 lines. 



Head rather elongate, with a few fine punctures on the vertex ; eyes very large ; antennae half the length of 

 the body, the three lower and the two apical joints fulvous, the rest black, the third joint scarcely longer 

 than the second; thorax twice as broad as long, the sides slightly rounded, the surface finely rugose- 

 punctate, with some very obscure pieeous markings ; scutellum black ; elytra closely and finely punctured, 

 the interstices still more finely so, with a spot at the middle of the sides, and a similar but larger spot 

 near the apex of each, black. 



Eab. Guatemala, Sinanja, Cerro Zunil (Champion). 



Two examples. In the specimen from Sinanja the anterior elytral spot is the largest 

 and of transverse shape, but in other respects it agrees with the one from Cerro Zunil. 



4. Monolepta elongata. 



Elongate, testaceous ; antennas (the basal three joints excepted) black ; thorax minutely punctured, the lateral 

 margins black ; elytra extremely closely punctured, narrowly margined with black. 



Length 2 lines. 



Head extremely minutely punctured, the vertex with a small black spot ; palpi pieeous ; antennas more than 

 half the length of the body, the three lower joints testaceous, obscurely stained with pieeous, the third 

 joint one half longer than the second ; thorax twice as broad as long, all the margins slightly rounded, the 

 sides narrowly black, the surface very finely punctured, with an almost obsolete depression at the sides ; 

 scutellum black; elytra narrowly elongate, rather more distinctly punctured than the thorax, the inter- 

 stices very finely wrinkled, the margins very narrowly black ; epipleurae continued below the middle, the 

 inner margin black ; the first joint of the posterior tarsi as long as half the tibiae. 



Eab. Mexico, Guadalajara in Jalisco, Matamoros Izucar in Puebla (Edge), Orizaba 



Salle). 



Of a more elongate and parallel shape and also larger than M. subrugosa and 

 M. imitans. 



5. Monolepta chiriquensis. 



Black, the antennae and legs flavous ; head and thorax finely granulate and punctured ; thorax obsoletely trans- 

 versely depressed ; elytra closely and rather strongly punctured. 



Var, Elytra testaceous. 



Length 1^ line. 



Head with a few fine punctures, minutely granulate ; the frontal tubercles distinct ; labrum obscure testaceous ; 

 antennae two thirds the length of the body, flavous, the terminal joints obscure fuscous, the third joint not 

 longer but more slender than the second, the fourth joint twice as long as the second ; thorax transverse, 

 nearly three times as broad as long, the sides slightly rounded, the disc with a transverse more or less 

 distinct depression, the surface a little more closely but not more strongly punctured than the head ; elytra 



