612 STUDIES IX AUSTRALIAN ENTOMOLOGY, NO. XII., 



jj. Prothorax with sides lightly rounded, border rather 

 narrow, not explanate before basal foveje; seventh 



interstice strongly impressed 



S. esmeraldipennis, Casteln. 



ee. Mesoternal and metasternal episterna punctate. 



k. Ventral segments nitid, three apical only punctate on sides near 

 anterior margins, third impunctate, second wuth a few punc- 

 tures. 



I. $ with elytral interstices nitid. 



m. { $ ) Prothorax with border unusually widely and strongly 

 reflexed posteriorly, wide before basal foveas. Elytral 

 striae not shallower towards apex. Onychium glabrous 



beneath S. dampieri, SI. 



mm. Prothorax with border narrow in front of basal foveas; 

 elytral strias shallower posteriorly. Onychium setulose 



beneath S. civilis, Germ. 



kk. Ventral segments, including second and third, finely punctate 

 near sides; elytra black. (Onychium setulose beneath.) 

 n. Prothorax with sides strongly rounded (strongly curved 



posteriorly); elytra with inner humeral angle wide 



S. Jiabitans, SI. 



nn. Prothorax evidently narrowed to base; elytra with inner 

 humeral angle marked S. madeayi, SI. 



II. Elytra in ^ nitid with a metallic flush, in $ with interstices 



depressed, opaque, 

 o. Onychium setulose beneath. Elytra, especially in ^ , 



bluish S. cooki, SI. 



00. Onychium glabrous beneath. Elytra, especially in ^ , 



virescent S. monarensis, SI. 



DD. Form graceful ; size small (8'5-10 mm.). / jS'. cycloderns, Chaud. 

 Posterior tarsi long, slender; penultimate ) S. iriditinctus, Chaud. 

 joint narrow and hardly widened at apex ( S. ischnus, Casteln. 



I have nothing to add in reference to S. cydoderus, S. iridi- 

 tinctus, and S. ischnus. S. obscurus, Blkb., (unknown to me in 

 nature) seems allied to .S*. cycloderns. 



S. rockhamjHoitensis, Casteln., has been omitted from the table 

 given above, because I have felt unable to deal with it in a 

 satisfactor}^ way; for a note on it, vide my "Review." The 

 specimen (9) there referred to remains unique in my collection, 

 and is not in a good state of preservation. I may note here that 



