Genera of the Cossonidoe. 547 
detected by Mr. G. Lewis in Japan, — namely, in the 
islands of Kushiu and Nipon ; and it is remarkable from 
bearing a certain jnnmd facie resemblance to some of the 
smaller members of Calandra ; whilst likewise its deeply 
sculptured, besmeared surface, rather elliptic outline, and 
costate elytra recall to mind some of the features of the 
Dryophthorides : nevertheless its 7-jointed funiculus and 
pseudotetramerous feet affiliate it at once with the true 
Cossonids. In other respects it is conspicuous for its 
rostrum being faintly attenuated towards the tip, for its 
eyes being exceedingly depressed, for its elytra being 
lopped-off straightly at their extreme apex, for its legs 
being rather short and robust, for its tibiae (which have 
their hook powerfully developed) being armed with a small 
though robust spinule at their inner angle, and for its feet 
being very short and filiform, — with their third articulation 
not at all expanded or bilobed. 
53. ExODEMA (Wollaston, Trans. Ent. Soc. Lond. 
22. 1873). — The unique insect on which this genus was 
founded is, like Coprodema and Pholidoforus, from the 
Japanese archipelago, — Avhere it was captured by Mr. G. 
Lewis. Its prima facie aspect indeed, and opake, densely 
sculptured surface (which is sparingly besmeared with a 
sort of dirty-whitish, scaly, mud-like deposit), ai*e so 
strongly suggestive of the former that it might well be 
regarded, at first sight, as a second member of that group ; 
yet when closely inspected it differs so essentially in the 
structure of its feet, which are not only much longer but 
have their third joint (instead of small and simple) con- 
spicuously widened and bilobed, that I cannot but think 
that it should be treated as the type of a nearly-allied but 
distinct genus. As regards its less important details, its 
antennoe are a trifle more elongate, and not quite so 
medially inserted (being implanted just perceptibly before 
the middle of its rather thicker rostrum), its eyes are a 
little more developed, its elytra are not at all truncated at 
their apex, and its metasternum and legs (especially the 
latter) are appreciably longer. Its femora also, at any 
rate the anterior pair, are proportionately not quite so 
clavate. 
54. Melarhinus (7iov. gen.). — The insect from which 
the characters for the present genus have been drawn out 
