Genera of the Cossonidce. 547 



detected by Mr. G. Lewis in Japan, namely, in the 

 islands of Kushiu and Nipon ; and it is remarkable from 

 bearing a certain primd 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 tibiaa (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, where it was captured by Mr. Gr. 

 Lewis. Its primd facie aspect indeed, and opake, densely 

 sculptured surface (which is sparingly besmeared with a 

 sort of dirty-whitish, scaly, mud-like deposit), are 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 

 antennae 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 (nov. gen.). The insect from which 

 the characters for the present genus have been drawn out 



