512 Mr. T. Vcrnon Wollaston on the 



differently constructed. In reality it belongs to that par- 

 ticular section of the Pentarthrides in which the scutellum 

 is developed and the surface bald, and it is remarkable 

 amongst the immediately-allied forms for its somewhat 

 convex, Phlceophagus-likQ body, for its (rather short and 

 broad) rostrum being a good deal contracted, or as it were 

 pinched-in, at the base, for its eyes being (instead of pro- 

 minent) depressed, and for its four anterior legs being (as 

 in the Phlceophagi) much more approximated at their base. 

 Its surface (which is shining) is of a reddish, and slightly 

 pellucid, chestnut hue, with the head, rostrum, and femora 

 a little darker than the rest; its antennas are somewhat 

 thickened, with their second funiculus-joint not at all 

 elongate ; and its feet have their first articulation (as in 

 Phlceophagus} appreciably lengthened, and their third one 

 minutely (and not very distinctly) bilobed. The example 

 from which the generic details have been compiled is 

 South- American (having been received from New Gra- 

 nada), and has been communicated by Mr. Fry. 



11. PSEUDOPENTARTHRUM (nov. gen.}. The rather 

 obscure little Cossonid which forms the type of the present 

 genus, is from Mexico, and has been communicated by 

 Mr. Fry ; and its primd facie aspect is so much that of a 

 minute and cylindrical Phlceophagus, that until I observed 

 that its funiculus is only 5 -jointed I had regarded it as a 

 member of that group. In reality however it is very close, 

 in affinity, to Pentarthrum, from which it nevertheless 

 recedes in its very much smaller size and shortly-cylindri- 

 cal body, in its more abbreviated and relatively broader 

 (though equally parallel) rostrum, in its prothorax and 

 metasternum being very much less elongated, and in its 

 anterior coxas being much more approximate. Indeed 

 the latter are almost exactly the same as in Phlceophagus, 

 the front pair being nearly contiguous ; and its prothorax 

 also, which is oval (instead of elongate and subtriangular), 

 is almost on the Phloeophagus-patteYn. Its under-seg- 

 ments are slightly scooped-out, or concave, after the 

 fashion which obtains in so many of the Pentarthrides ; 

 its surface is completely bald, black, and but very slightly 

 shining ; and the third articulation of its feet is simple. 



In point of fact, however, the present genus is some- 

 what intermediate between Pentarthrum and Phlceopha- 

 gomorphus, agreeing with the latter in its more approxi- 

 mated anterior coxce ; nevertheless it entirely wants the 



