BY THOMAS G. SLOANE. 455 



Size very large ; elytra broad, 

 widely rounded behind E. waterhousei, Macl. 



Size moderate ; elytra narrow, and 

 narrowly rounded behind E. atratus, SI. 



hh. Reflexed border of elytra extending 

 past humeral angle on to base, 

 narrow, and not forming a thick- 

 ened projection at shoulder. 



G. Posterior margin of prothorax 

 rounded and decidedly lobate, 

 posterior angles not marked ... E. minor, Macl. 



cc. Posterior margin of prothorax 

 very lightly rounded, hardly 

 lobate, the posterior angles 

 rounded, but well marked. 



Elytra lightly convex, narrowed 



to apex E. politus, SI. 



Elytra very convex, widely 



rounded at apex E concolor, SI. 



aa. Posterior angles of prothorax sharply 

 upturned and rectangular, the base 

 truncate between them E. subsulcatus, Blkb. 



EURYSCAPHUS WATERHOUSEI. 



^. Scaraphites waterhousei, Macl., Trans. Ent. Soc. N.S.W., 

 1864, I. p. 147. 9- Euryscaplius titanus, SI., Proc. Linn. Soc. 

 N.S.W., 1889, iv. (2) p. 1288. 



I have recently seen a specimen of E. waterhousei, Macl., from 

 the MacDonnell Ranges, belonging to Mr. C. French. It is a 

 male, and from a comparison of it with the type of E. titanus, SI., 

 I am able to state without doubt that the latter is merely the 

 female of E. waterhousei ; the differences on which I separated it 

 from that species being entirely sexual. 

 32 



