76 University of Michigan 



Arionus ulophilus, sp. nov. 

 PI. 28, Figs. 200, 201 ; PL jg. Figs. 2C2 2c6 



Dorsum (metazonites) brown, paler in going caudad. Ven- 

 ter paler, fulvous. 



Vertex of head covered by an elevated shield-shaped and 

 strongly tubercular area, 'this area crossed by a longitudinal 

 sulcus ending in a notch in the lower end of the elevated area. 

 This area brow-n, the lower smoother parts of head fulvous. 

 Face with a large, rounded prominence on each side ectad of 

 antennal socket. (PI. 29, Fig. 202.) 



CoUuni with anterior margin convex, the border in form 

 •of a rim divided by sulci and slightly marginal crenations into 

 ten lobes. The surface otherwise densely tuberculate, all of 

 the tubercles small. (PI. 29, Figs. 202, 203.) 



Second tergite bowed forward at ends so that basal lobes 

 of posterior margin extends ectad and appears as a shorter 

 fourth lobe. This and following segments show an anterior 

 rim divided into areas similar to those of caudal border, these 

 becoming shorter in going caudad. (PI. 29, Fig. 203.) Dor- 

 sum of metazonites densely tubercular, none of tubercles large, 

 forming five or six more or less irregular transverse rows. 

 Pores small, scarcely elevated. (PI. 28, Fig. 201.) 



On antepenult tergite the caudal areas project ,as obtuse 

 processes with the caudal processes of keels large ; these proc- 

 esses on the penult are longer, more acute and six in number 

 inclusive of the processes of keels which are of similar size. 

 (PI. 29, Fig. 204.) 



Anal tergite as shown in PI. 29, Fig. 204. Anal scale, PI. 

 28, Fig. 200. 



Gonopods of male as represented in PI. 29, Figs. 205 and 

 206. 



