214 STAPHYLINIDZ. 
at the base; the apical joint again rather paler; third joint a good deal longer than 
the second ; fourth shorter than fifth; fourth to tenth joints much narrower at the base 
than at the apex; tenth about as long as broad ; terminal joint both elongate and broad, 
quite as long as the two preceding together. Head small, only about half as broad as 
the elytra. Thorax elongate, narrower than the elytra, as long as broad, a little 
narrowed behind; the disk flattened and closely granulose-punctate, the margins 
broadly smooth. FElytra with granulose punctuation. 
This insect has somewhat the appearance and size of a Homalota. A single indi- 
vidual is present from each locality; they are very mutilated and are probably males. 
Each elytron has an obscure longitudinal carina near the side, and a slight transverse 
elevation near the base and the suture. The apical dorsal plate of the hind body is 
granulose and a little prolonged in the middle, the most projecting part being slightly 
emarginate. On each side there is an obscure angle, not sufficiently prominent to be 
called a tooth. 
PLATONICA. 
Coxee intermediz late distantes ; mesosterni processus inter eas parum productus, apice fere truncato ; meta- 
sterni processus inter coxas longius productus, apice truncato, cum mesosterni processu fere contiguo. 
Prothorax marginibus acute inflexis. Tarsi posteriores sat elongati, 5-articulati, articulo basali quam 
secundus fere duplo longiore. 
This genus is proposed for some insects intermediate to a considerable extent between 
Myrmedonia and Hoplandria. Platonica differs from the former genus by the fact that 
the sternal processes are more prolonged between the coxe, so as to become nearly or 
even quite contiguous, and the raised margin along the inner edge of the coxal cavity is 
thus completed. The apices of these processes, however, are in some cases rather 
difficult to distinguish, owing to the margins by which they are limited being nearly 
obsolete. The genus differs from Hoplandria by the greater elongation of the basal 
joint of the hind tarsus, as well as by other details. 
The head is short and quite destitute of aneck. The ligula in the middle is elongate 
and slender, extends nearly as far forward as the extremity of the first joint of the 
labial palpus, and is deeply divided at the apex, the division extending nearly halfway 
to the base; but the divided processes remain parallel. ‘The lobes of the maxille are 
simply ciliate; but the inner one has a free slender extremity provided with a minute 
and rather imperfect supplementary joint. The rather elongate paraglosse are of the 
most extreme tenuity and delicacy. The side of the prothorax forms a sharp edge, 
owing to the great folding-in of the side pieces. 
I am not acquainted with any species, other than those here described, that can be 
ascribed to the genus. 
