MONOLEPTA. 621 



slightly widened behind, closely and strongly punctured, the interstices slightly rugose; the first joint of 

 the posterior tarsi much longer than the following three joints together. 



Bab. Panama, Volcan de Chiriqui 3000 feet (Champion). 



It is possible that the specimens with testaceous elytra are immature. Many speci- 

 mens were obtained of both forms. 



6. Monolepta subrugosa, ; 



Testaceous, the apical joints of the antenna fuscous; thorax with two depressions, closely punctured the sides 

 black; elytra closely semirugose-punctate, testaceous, the sutural and lateral margins narrowly black. 



l£!d w'ttout e punctures, the vertex often with a black spot ; the frontal tubercles distinct, divided by the apex 

 of a raised central ridge which extends to the clypeus; antenna, two thirds the length of the body, the 

 six or seven lower joints testaceous, the rest black, the second and third joints short, equal, the fourth 

 joint shorter than the fifth ; thorax transverse, the sides straight, the posterior margin rounded, the surface 

 closely and finely punctured and somewhat rugose, the lateral margin with a narrow black band, the disc 

 with a small transverse depression on each side ; elytra a little less closely but as finely punctured as the 

 thorax, the interspaces irregularly wrinkled, the suture and the lateral margins very narrowly black. 



Hal. Guatemala, Cerro Zxrnil (Champion) ; Panama, Volcan de Chiriqui (Champion). 



This insect resembles unicolorous specimens of Luperodes apicicomis, but differs in 

 the short third joint of the antennae, the colour of the thorax and elytra, and the 

 sculpture of the latter, as well as by the closed anterior coxal cavities. 



7. Monolepta imitans. (Tab. xxxiv. fig. 22.) 



Testaceous ; antennas pieeous, the base of each of the joints pale ; thorax with the lateral margins and a streak 

 at the middle, pieeous ; elytra semirugose-punctate, testaceous, the sutural and lateral margins extremely 

 narrowly pieeous. 



Length 1A line. . 



Head minutely granulose and finely but distinctly punctured, the vertex often with a more or less pieeous spot ; 

 the clypeus with a distinct raised central ridge extending upwards between the frontal tubercles; antennae 

 two thirds the length of the body, pieeous or black, all the joints pale testaceous at the base, the second 

 and third short and equal ; thorax twice as broad as long, the sides slightly but evenly rounded, the surface 

 with an obsolete transverse depression, sculptured and punctured like the head, the extreme lateral margins 

 and a narrow central longitudinal streak, pieeous ; scutellum pieeous ; elytra subcylindncal, closely and 

 scarcely more distinctly punctured than the thorax, the interspaces very finely wrinkled, the extreme 

 sutural and lateral margins pieeous ; underside and the legs testaceous. 



Hah. Mexico, near the city (Edge); Guatemala, near the city, Capetillo, San 

 Geronimo (Champion). 



M. imitans greatly resembles M. subrugosa, but differs in having the joints of the 

 antennse shorter and more robust (in M. subrugosa they are slender and elongate), in 

 the distinctly punctured head, the central mark of the thorax, and in the pieeous 

 margin of the elytra ; in M. subrugosa the sides of the elytra are more broadly and 

 more distinctly pieeous, but this colour does not extend beyond the middle. The elytra 

 in the present species, of which many specimens were obtained, are also more finely 

 punctured than in M. subrugosa. 



