146 



PEOCEEDINGS OF THE NATIONAL MUSEUM 



Saussiirobolus nietanus (Saussiire) 



Julus nietanus Saussure, 1860, p. 565, pi. 5, fig. 33, a-d (male holotype, Mus. Hist. 

 Nat. Genfeve, from Cuernavaca, Morelos, Mexico, collected by H. Saussure). 

 Spirobolus nietanus Saussure and Humbert, 1872, p. 89. 

 Cyclothyrophorus nietanus Pocock, 1910, p. 84. 

 Saussurobolus nietanus Carl, 1919, p. 390, fig. 16. 



The following description is from Pocock (1910): 



Small, cylindrical, with the seventh and eighth segments dilated. Head 

 polished, punctured below, with 5 + 5 or 4 + 4 labral pores. First tergal plate with 

 its anterolateral border widely emarginate, its inferior angle very acute and ex- 

 tending slightly below the level of the second, which is not produced inferiorly 

 below the level of the third. The remaining segments smooth and shining; the 

 normal transverse sulcus complete and preceded by an additional complete 

 sulcus; a well-marked longitudinal sulcus in front of and behind pore. The 

 lateral sulci or striae strongly defined. Anal segment with tergal plate obtusely 

 rounded, marked with a transverse rugulose groove; valves scarcely surpassing 

 the tergal plate, strongly punctured, convex, and not compressed marginally; 

 sternal plate rounded. 



i 



Figure 9.— Distribution of species of the subfamily Arinolinae in the southwestern United 

 States and Baja California: 1, Arinolus torynophor; 2, J. apachellus; 3, A. citrinus; 4, 

 A. hopinus; 5, A. nogalanus; 6, A. latus; 7, A. pimus; 8, A. chiricahuanus; 9, A. hospes; 

 10, A, dentatus; 11, Piedolus uius; 12, Scobinomus serraius. 



