374 Mr. O. E. Janson's Descriptions of 



A second specimen which I liave before me, and wliich is 

 evidently tlie female of this species, differs in its In-oader 

 and more rounded form, its somewhat shining liead and 

 thorax, its l)identate anterior til)iie and unidentate inter- 

 mediate and posterior tibiie, its shorter antennae and in 

 liaving all the ochreous markings obliterated except a few 

 iri-egular spots near the sides of the elytra. 



Cayenne. Coll. Higgins. 



A very peculiar species agreeing in several cliaracters 

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

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

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



Gymneiis Ghontalensis, n. sp. Plate IX., fig. 4. 



G. Kufo-brunnea, opaca ; thorace elytrisque maculis 

 irregularibus nigris ; corpore infra ])edil)us(pie nigro- 

 cinereis, opacis. Long. 18-21 nnn., lat. 10-12 mm. 



Reddish l)rown, opaque, thoi-ax and elytra with numerous 

 irregular black maxkings varying in form and size, 

 underside and legs cinereous. 



Head flat, sparingly punctured, clypeus quadrate, apex 

 entire, slightly rounded and elevated, antenna3 pitchy. 



Thorax sparingly and finely punctured at the sides, 

 lateral margins nearly straight, posterior angles somewhat 

 acute, l)asal lobe entirely covering the scutellum. 



Elytra sub-truncate behind, sides nearly straight, 

 impunctate, sutural apical angles produced. 



Pygidium closely strigose. 



Beneath coarsely punctured at the sides, sparsely clothed 

 with very short brown hairs ; mest)sternal process very 

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

 punctured, anterior tibia? witli two indistinct teeth, inter- 

 mediate and posterior tibia? witli a fringe of l)rownish liair. 



Tlic female differs from tJie male in its stronger punc- 

 tuation, its acutely bidentate anterior tibifo, and in having 

 the apex oi" the cly])eus, underside and legs shining black. 



