Genera of the Cossonidcs. 575 



abbreviated, and the club less developed ; in its prothorax 

 being generally more conspicuously narrower than the 

 elytra, less elongate, and not so deeply constricted in 

 front ; in its scutellum being less transverse ; in its meta- 

 sternum being appreciably shorter ; and in its feet being 

 slenderer, with their third articulation usually smaller and 

 narrower, and much more minutely bilobed. Its eyes, as 

 in Oxydema, are extremely prominent, and its sculpture is 

 rather coarse. The first of the three species, however, 

 which are described in this paper ( namely the O. major), 

 I may add, is not quite so typical of the group as the other 

 two ; nevertheless I do not think it can be looked upon as 

 an Oxydema. 



94. APHANOCORYNES (nov. gen.) In its rather large 

 size, elongate, narrow, subfusiform outline, and deep-black 

 hue the insect for which the present genus is founded, and 

 which has been communicated by Mr. Pascoe (as having 

 been captured by Dr. Masters at King George's Sound, 

 in southern Australia), has somewhat the appearance at 

 first sight of Oxydema which occurs in Ceylon and the 

 islands of the Malayan archipelago. Nevertheless it 

 differs in its body being more depressed, and much more 

 finely and closely sculptured, in its elytra being less at- 

 tenuated posteriorly, and without any tendency to be sepa- 

 rately rounded-off at their extreme apex, in its rostrum 

 being a litle shorter and entirely parallel, and in its club 

 being very much less developed. Indeed this latter is even 

 smaller, narrower, and more acuminated than in even the 

 typical Rhyncoli. Its prothorax too (which however, as 

 in that genus, is deeply constricted at the apex) is not 

 altogether even, it being widely, but lightly, impressed 

 in the centre behind ; and its third tarsal joint is more 

 evidently dilated and bilobed, and the terminal one is 

 shorter, than is the case in Oxydema. 



95. ORTHOTEMNUS (nov. gen.). As in the two pre- 

 ceding genera, the type of the present group (which ap- 

 pears to be extensively spread over the islands of the 

 Malayan archipelago) is a comparatively large and elon- 

 gate insect, and of a dark hue ; but it recedes in many 

 important particulars from the neighbouring forms, par- 

 ticularly however in its flattened surface, and elongate, 

 triangular prothorax, which is very straightly truncated at 

 the base (where it is of the same width as the elytra 



