the Atlantic Cossonides. 383 



B. Funiculi (trtkulus Imus sccundo v'lx lal'ior ; 2das icrl'io mullo 



longior. 



24. Mkroxijlohius terebrans, n. sp. (PI. 18, fig. 7.) 



M. fiisiformi-ovatiis, aeneus, nitidus ; capite vostroque sat con- 

 feitim et profunde punctatis ; prothorace convexo, sat pro- 

 fiinde piinctato, ad latera rotundato ; clytris convexis, leviter 

 punctato-striatisj interstitiis latis punctatis, ad basin ipsam 

 paulo ruguloso-asperatis; antcnnis tarsisque rufo-piceis, il- 

 larum capitulo minore, minus abrupto, ovato. 

 Long. Corp. lin. !§. 



If it sliould so happen (whicli, however, I think is not probable) 

 tliat the curious development of an acute spine on the upper edge 

 of the thighs in tlie two following Microxylobii should be a sexual 

 character, it is possible that the present species (of which I pos- 

 sess only a pair of females) may be removed eventually into the 

 next section ; with the members of which, in the more elongated 

 second joint of its funiculus and its brightly aeneous hue, it better 

 agrees. Still, in the absence of any appearance of a femoral spine, 

 and under the impression that that structure is not a sexual one, 

 I have no alternative but to include the M. terebrans in the same 

 primary division with the lucertosus and lucJfugus. In minor de- 

 tails, its shining brassy surface will at once distinguish it from 

 any of the Microxylobii here described except the M. Chevrolatii 

 cind conicollis ; from the latter of which it is altogether removed 

 by the short-ovate outline, conical prothorax, arcuate upper sur- 

 face, and peculiar antenna;, of that insect. From the M. Chevro- 

 latii it may be immediately known by its smaller size, more ovate 

 outline, more convex prothorax and elytra (the former of which 

 is more deeply punctured), and by its rather smaller and less 

 abrupt antennal club. 



§ II. Femora posiica {in ulroquc sexu?) spind magnd acutissimd 

 sub-hasali supra armaiis. Funiculi articulus Imus secundo 

 xix latior; 2dus tertio mullo longior. (Microxylobii aherr antes. 

 — Subg. Thaumastomerus, Woll.) 



25. Microxylohius Chevrolatii, n. sp. (PI. 18, fig. 8.) 



M. fusiformi-clongatus, laete eeneus, nitidus; capite rostroque 

 sat confertim et profunde punctatis ; prothorace subconvexo, 

 levissime punctulato, ad latera rotundato; elytris leviter 

 punctato-striatis, interstitiis latis leviter punctatis, antennis 

 tarsisque rufo-piceis, illarum capitulo abrupto, globoso- 

 ovato. 



Long. Corp. lin. 2|. 



