264 PHALACRIDZ. 
traces of longitudinal strie may be detected there converging towards the sutural 
stria. The raised lateral margin and the sides of the thorax, as well as the scutellum, 
are picescent. One example in a bad state of preservation. 
So far as I can see, this is a true Zitochrus with slender hind feet; the difference of 
colour between the upper and under surfaces is remarkable. 
8. Litochrus (?) ——? 
Hab. Panama, Tolé (Champion). 
A single example, smaller even than Olibrus atomarius, is referred to this genus with 
some doubt, as I am unable to get a good view of its sculpture. 
OCHROLITUS, gen. nov. 
Tarsi posteriores filiformes, articulo basali elongato, secundo elongato, tertio parvo, quarto secundo paullulum 
breviore. Metasternum medio parum prominulum, rectum, subtiliter marginatum ; mesosternum haud 
conspicuum ; prosternum apice libero, brevi, marginato. ibis bene calcarate. 
The genus is described from a single badly preserved individual. So far as the tarsi 
are concerned it might be treated as a Litochrus ; but the structure of the breast is not 
sufficiently concordant with that of the other species, so I think it advisable to separate 
it as distinct. The small prosternal process projects beyond the front coxe and has a 
rounded and margined extremity ; the middle coxe are but narrowly separated and the 
metasternum is very little prominent, and yet the mesosternum does not form a distinct 
piece in front of its margin, these two parts being formed much as in Litolibrus, from 
which Ochrolitus differs very much in the structure of the hind feet. 
1. Ochrolitus optatus, sp. n. (Tab. VIII. fig. 5.) 
Ovalis, convexus, nitidus, rufus, prothorace picescente ad latera dilutiore ; elytris stria suturali striisque 
duabus internis cum stria suturali ante apicem conjunctis. 
Long. 27 millim. 
Hab. Costa Rica, Volcan de Irazu 6000 to 7000 feet (Rogers). 
Antenne yellow, with very broad club. Thorax not margined at the base. Scutellum 
quite small. Elytra with a fine sutural stria, and two other strie that touch the 
sutural one, one in front of the other some distance before the extremity, and besides 
these with some very fine transverse aciculations on the apical portion. All the feet 
slender. 
We have received only a single example. The broad club of the antenna and the 
peculiar convergent striee on the wing-cases render this insect easy of recognition. 
