374 Mr. 0. E. Janson's Dcscriptio7is of 



A second specimen which I have before me, and which is 

 evidently the female of this species, differs in its Itroader 

 and more rounded form, its somewhat shining head and 

 thorax, its bidentate anterior tibiie and iinidentate inter; 

 mediate and posterior tibiae, its shorter antennae and in 

 liaving all the ochreous markings oljliterated except a few 

 irregular spots near the sides of the elytra. 



Cayenne. Coll. Higgins. 



A very peculiar species agreeing in several characters 

 with Allorhina, to which genus I should have referred it, 

 but as both sexes are before me, and the male has the 

 clypeus simple, I am constrained to locate it in Gymnetis. 



Gymneiis Chontalcnsis, n. sj). Plate IX., fig. 4. 



G. Eufo-brunnea, opaca ; thorace elytrisque maculis 

 irregularibus nigi'is ; corporo infra pediljusque nigro- 

 ciuereis, opacis. Long. 18-21 mm., lat. 10-12 mm. 



Reddish brown, opaque, thoi-ax and elytra with numerous 

 irregular black markings varying in form and size, 

 underside and legs cinereous. 



Head flat, sparingly punctured, clypeus quadrate, apex 

 entire, slightly rounded and elevated, antenna3 j)itchy. 



Thorax sparingly and finely punctured at the sides, 

 lateral margins nearly straight, posterior angles somewhat 

 acute, basal lobe entirely covering the scutellum. 



Elytra sub-truncate behind, sides nearly straight, 

 impunctate, sutural apical angles produced. 



Pyfjidium closely strigose. 



Beneath coarsely punctured at the sides, sparsely clothed 

 with very short brown hairs ; mesosternal process very 

 obtuse, vertical and with a distinct tooth in front ; legs 

 punctured, anterior tibi;i3 with two indistinct teeth, inter- 

 mediate and posterior tibia} with a fringe of Ijrownish hair. 



The female differs from the male in its stronger punc- 

 tuation, its acutely bidentate anterior tibia?, and in having 

 the apex of the clypeus, underside and legs shining black, 



