692 NEW SPECIES OF AUSTRALIAN COLEOPTERA, X., 



species, except that an impanctate space can usually be traced 

 along the middle, On each side of the base, a narrow space 

 (usually concealed by the elytra) is irregularly crowded with 

 small punctures. On the elytra, the punctures about the basal 

 fourth are almost, or quite, as wide as the interstices, but they 

 rapidly become smaller, Numerous specimens were taken by Mr. 

 C. French (Jr.) on Queensland logs in Melbourne. 



COSSONUS POROSTERNUS, n.Sp. 



Black, shining: appendages dark red. 



Head with small and not very numerous punctures between 

 eves, elsewhere highly polished and impunctate: with a small, 

 narrow, isolated, interocular fovea. Rostrum more than twice 

 as long as greatest Avidth, rather strongl}^ narrowed behind 

 antennae, where the punctures along the middle are as those 

 between eyes, but denser and coarser on sides; in front of an- 

 tennae about as long as wide, with the sides lightly incurved, 

 punctures more numerous but smaller than along middle. Pro- 

 thorax not much longer than greatest width, sides rounded, base 

 rather strongly bisinuate, and almost twice the width of apex, 

 sides with dense and fairly large punctures, sides of disc with 

 small and sparse punctures, along middle with some large punc- 

 tures becoming crowded and irregular on a subtriangular, basal, 

 depressed space, but middle of the triangle irregularly elevated. 

 Elytra moderately convex, just perceptibly wider than widest 

 portion of prothorax ; with rows of large, round punctures, 

 becoming smaller posteriorly; interstices with sparse and very 

 minute punctures. Prosterimm and mesosternum with dense 

 and large punctures. Length, 4^-4| mm. 



^a6. — Queensland : Cairns (E. Allen). 



In general appearance, close to C. excavatus (for some cotypes 

 of which, I am indebted to Dr. Gestro), but differs, in being 

 slightly smaller, prothorax: with larger punctures about sides, 

 and the rostrum much thinner, with much smaller punctures, 

 and the interocular fovea without a frontal extension. C. incisus 

 has the prothorax with much coarser punctures, and the median 

 impression of very different shape. The rostrum is narrower 



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