MONOPLATUS. 9 



of the species were captured by Mr. Gray and myself in the imme- 

 diate neighbourhood of Petropolis (Organ Mountains, Rio Janeiro), 

 none of them were females. 



I name this handsome species after my friend and fellow-traveller 

 John Gray, Esq., to whom, for many personal kindnesses, I am 

 happy to acknowledge my obligations. 



5. Monoplatus Miersii. 



M. oblongo-ovalis, robustus, rufus, nitidus ; capite parvo, depresso, 

 oeidis magnis, hand eccstantibus, ad basin capitis attingentibus, 

 impunctato, rufo-fusco ; thorace transverso, marginato, angulis 

 anterioribus acutis, ad basin transverse subdepresso et foveolato, 

 fusco-rufo (inter foveam basinque nigro) ; elytris subdepressis, 

 punctato-striatis, nitidis, fasciis duabus nigris (ad suturam in- 

 terruptis), liac ad humeros lata, ad marginem attenuata, ilia ad 

 medium parva, inconstanti (aliquando macidas dims tantum 

 efficient!) ; antennis fuscis, ad basin rufis ; pedibus rnjis, tarsis 

 tibiisque anterioribus nigris. 



5 Long. corp. 3 lin., lat. 1| lin. 



Oblong- oval, robust, rufous, shining. Head transverse, very slightly 

 produced, impunctate, rufo-fuscous ; eyes large, prominent, at some 

 distance from each other, and almost touching posteriorly the thoracic 

 margin. Thorax transverse, rectangular in front, slightly emargi- 

 nate ; the anterior angles slightly produced and curved outwards in 

 the shape of a tooth ; the sides distinctly marginate ; at the base is a 

 regular transverse groove, parallel to the margin, which is deflected 

 abruptly towards the base of the elytra before it reaches the humeral 

 angle ; the base of the thorax (between this groove and the margin) 

 is very dark fuscous or even black. Scutellum triangular, impunctate, 

 rufous. Elytra broader than the thorax, robust, subcylindrical, ovate, 

 finely punctate-striate, rufous : two irregular black transverse fascise 

 are interrupted at the suture, and do not reach the margin ; the 

 anterior fascia reaches at its upper margin nearly to the base of the 

 scutellum, and thence obliquely decreases in breadth towards the 

 margin ; it is separated from the suture by the breadth of a single 

 stria, and from the margin by the distance of three stria? ; the 

 posterior fascia is hardly so broad as the anterior, and in one example 

 takes the form of two oblong irregular postmedial spots. Antennas 

 filiform, fuscous, with the basal joints rufous. Legs rufous, with the 

 anterior tibiae and tarsi, and also the outer edge of the posterior 

 tibioe darkly-fuscous. 



Brazil. In the collections of Messrs. Micrs and Murray. 



In general appearance this insect approaches to M. Gragii ; it 



