Coleopterological Notices. 41 T 



ele\reiith Init slightly narrower than the tenth. Prothorax two-fifths wirier 

 than the head and two-fifths wider than long ; apex extremely feebly incur- 

 vate in circular arc, the angles narrowly but distinctly rounded ; base a very 

 little wider than the apex, broadly truncate and straight, except near the 

 sides, where it becomes gradually sinuate, the basal angles acute, not at all 

 rounded and distinctly produced j^osteriorly ; sides rather feebly arcuate ante- 

 riorly, thence very slightly convergent and nearly straight to the apex of the 

 basal angles ; disk widest at apical third, very finely, sparsely punctate toward 

 the middle, the punctures dense, coarser and slightly scabrous but not coales- 

 cent laterally. Ehjlra equal in width to the prothorax and but slightly more 

 than twice as long ; sides nearly straight ; apex somewhat acute, each apical 

 angle sliglitly prominent behind ; disk with even rows of fine, moderately 

 approximate punctures, the stri;e extremely feebly impressed ; intervals each 

 with a single even row of punctures, which are of the same size and mutual 

 distance as those of the strife, but a little more asperate, each bearing a stiff 

 seta, the sets arising from the strial punctures being excessively minute. Ahdo- 

 v\m finely reticulate, finely, somewhat sparsely, subasperately punctate, the 

 pubescence rather fine and short but distinct. Legs rather short and slender. 



Male. — Fifth ventral segment with a very large, transversely oval impres- 

 sion at the bottom of which there is a feeble transverse ridge. 



Length 3.6 mm. ; width 1.2-1.4 mm. 



Southern California. 



The two speeimen.s before me are both males, so that I cannot 

 determine whether or not the remarkable internal flexure of the 

 fifth segment in repose is sexual in nature; it is probable, however, 

 that this is the ease. It is also very probable that the impression 

 of the fifth segment, given above as a male sexual character, may 

 be common to both sexes, this being the usual condition in Xotibius. 



IVOTIBIUS Lee. 



The sexual modification of the male becomes extremely feeble in 

 this genus, and the species are otherwise so homogeneous as to 

 suggest a more persistent and less plastic type than that of Conibius. 



The fringe of seta; at the sides of the pronotum is more strongly 

 developed than in Conibiosoma, and is so compact that under low 

 power it appears to be simply a thickened marginal bead, or other 

 analogous structure ; at the sides of the elytra it is replaced by a 

 fringe of more slender and much longer, erect and widely distant 

 setae. This is by far the most important structural character dis- 

 tinguishing Notibius from Conibius, and its presence in Conibius 

 elongatus, proves that the latter should be associated with Xotibius 

 rather than the genus in which it was originally placed, but as the 



