PLATONICA. 215 
1. Platonica major. 
Ferruginea, capite elytrisque externe versus angulos posteriores nigricantibus, pedibus rufo-testaceis; pro- 
thorace fortiter punctato, ante angulos posteriores oblique impresso; abdomine sparsim obsolete punc- 
tulato. 
Long. maris 10, femine 8-9 millim. 
Mas prothorace dorso deplanato crebriusque punctato, elytris ad latera marginatis, prope angulum suturalem 
processu triangulari elevato; abdominis margine laterali dilatato, seemento dorsali tertio in medio ante 
apicem signatura opacula parum elevata, segmento sexto in medio plica longitudinali ad apicem magis 
elevata. 
Hab. Costa Rica, Volean de Irazu 6000 to 7000 feet (Rogers). 
Antenne ferruginous, more dilute at the base; first joint elongate, third considerably 
longer than second, fifth to tenth differing little from one another, each strongly trans- 
verse ; eleventh joint large, quite as long as the two preceding together. Head black, 
rather coarsely punctate behind. Elytra a good deal longer than the thorax. Hind 
body with the dorsal plates shining, only sparingly and obsoletely punctulate, except 
the seventh, which bears a more distinct rather close punctuation and a fine pubescence. 
In the male the lateral margin on the wing-case is distinct, and is more than one half 
the length of the wing-case, but there is no subhumeral carina; the angular elevation 
at the inner angle is separated by a very distinct smooth space from the suture; the 
process on the third dorsal plate is large, but is very little elevated, and in front is 
broader and furcate, so as to be almost Y-shaped ; the dilatation of the lateral margins 
is considerable ; but the edges of the ventral plates take scarcely any part in the incras- 
sation, except in the case of the sixth segment, where the edge of the ventral plate is 
conspicuous on the upper surface for the whole length of the segment, so as to form 
a rather narrow somewhat sinuous margin. 
Five specimens have been found ; and it is from one of these which I have dissected 
that the description of the trophi of the genus is made. 
2, Platonica sallwi. (Tab. V. fig. 25.) 
Ferruginea, capite nigricante, pedibus testaceis; prothorace fortiter punctato, ante angulos posteriores oblique 
impresso ; abdomine sparsim obsoletissime punctulato. 
Long. maris 8 millim. 
Mas prothorace dorso deplanato crebriusque punctato, elytris ad latera marginatis, ad angulum suturalem 
processu triangulari elevato, carinaque subhumerali fortiter elevato ; abdominis margine laterali dilatato, 
segmento dorsali tertio in medio ante apicem signatura cruciformi, opacula, parum elevata, segmento 
sexto in medio plica longitudinali ad apicem magis elevata. 
Hab. Muxico, Cordova (Sal/é). 
I have seen only a single individual of this species; and though evidently closely 
allied to P. major, the sexual characters leave no doubt that it is a distinct species. 
There is a very strongly elevated subhumeral plica on each wing-case, and the elevation 
at each inner angle is placed quite close to the suture; the opaque mark on the third 
dorsal plate is not bifurcate, but is simply a little broader in front; the edge of the 
