AT^NIITS. 101 



narrow carinas which produces the effect of broad striae, part of each interstice being 

 depressed together with the striae. 



We figure a typical example from Cordova. 



18. AtaBnius carinator. 



Atcenius carinator, Harold, Col. Hefte, xii. p. 20 \ 



Hab. Panama, Bugaba, David (Champion). — South America, Venezuela 1 . 



Differs from A. scalptifrons, to which it is very closely allied, by the humeral spine 

 of the elytra being, as usual in the group, very short. The carinas of the interstices 

 are, besides* much higher and narrower and granulated, the remainder of each inter- 

 stice, with its feebly carinated striae, forming thereby broad furrows. 



Mr. Champion's specimens are rather smaller (2^- millim.) than the size (3J millim.) 

 given by Von Harold. 



19. Ataenius abditus. 



Aphodius abditus, Haldem. Journ. Ac. Phil. 1848, p. 106 \ 

 Atcenius abditus, Horn, Trans. Am. Ent. Soc. 1871, p. 289 2 . 

 Atcenius attenuator, Harold, Col. Hefte, xii. p. 22 3 . 



Hab North America, United States 1 2 . — Mexico 3 , Northern Sonora (Morrison), 

 Nuevo Laredo (Hoge), Presidio (Forrer). 



Of more elongate form (the elytra especially relatively longer) than A. polyglyptus 

 and its allies, in this respect approaching A.figurator. The sculpture above and beneath 

 is very similar to that of A. polyglyptus, var. hieronymi, but the line of fine punctures 

 along the outer side of the interstices is less conspicuous and often confused. The 

 following appears to be a var. ; it was received, together with more typical examples, 

 from Belfrage, and communicated to me by Von Harold. 



Var. A. texanus, Harold, Col. Hefte, xii. p. 23. Thorace antice sublaevi elytrorumque interstitiis convexis.. 



Hab. North America, Texas (Belfrage). 



20. Atasnius inops. 



Atcenius inops, Horn, Trans. Am. Ent. Soc. xiv. p. 73 (March 1887) 1 . 



Hab. North America, Arizona 1 (Morrison). — Mexico, Northern Sonora (Morrison). 



Numerous examples sent by Morrison. This insect differs from A. abditus in the 

 rather sparser puncturing of the sides of the thorax and the somewhat flatter elytral 

 interstices, and, what is more important, in the shortness of the basal joint of the four 

 posterior tarsi. The colour is always reddish-testaceous, shining. Length 4 millim. 



