8o MEMOIRS ON THE COLEOPTERA 



scutellum coarse and irregularly diffused; abdomen with fine close 

 sculpture almost throughout, the rugulse of the metasterum much 

 coarser and deeper than in any of the preceding; all the legs are much 

 stouter but varicolored as in strigosa. Male with the sinus of the 

 sixth ventral broad and extremely shallow. Length (cf ) 27.5 mm.; 

 width 13.4 mm. Honduras (San Pedro Sula) . . *punctulata Bates 



Punctidata differs from the usual type of this subgenus in colora- 

 tion, sculpture of the pronotum and elytra and especially in the 

 relatively stout legs throughout, a character that was not noticed 

 by Mr. Bates; the spines at the apices of the elytra are also much 

 reduced in size. The stout legs of this species may be a sexual 

 character to some extent, as it is not very evident in the figure 

 given of a female of punctidata which, even allowing for the sex of 

 the individual, is much too stout and oval, if the Honduras example 

 described above is entirely typical. 



Group III. 

 Subgenus Delipnia nov. 



The assumed type of this division of the genus is the Pelidnota 

 belli of Sharp, which, at the time it was described at least, was the 

 only form occurring north of the Isthmus of Panama; the species 

 are numerous and apparently abundant individually in South 

 America. The lobes of the clypeus are prominent in both sexes, but 

 the notch is always deeper and the clypeus more narrowed and 

 apically reflexed in the female than in the male. This is a very 

 distinct section of Pelidnota, largely a geographic development, and 

 should be given a distinctive name, although in the genus at large 

 a number of other divisions, equally worthy of such distinction, 

 undoubtedly exist. 



Plusiotis Burm. 



This genus is allied to Pelidnota but is well distinguished by the 

 unbroken outer outline of the mandibles, as well as by a less defin- 

 able but none the less evident difference in the general habitus 

 and coloration of the body; this is due, in large part, to the shorter, 

 more oblong-oval form and denser and less pellucid or pearly 

 coloration. Almost all the structural characters of the under 

 surface and legs are identical in the two genera, or so nearly alike 

 that no practical use could be made of the differences in classifica- 



