ON THE GENUS CHALCOCYBEBUS. 21 



in the male shows on both sides rows of strong tubercles , 

 whilst in the female it is only coarsely punctured ; more- 

 over the anterior femora in some species are, in the male 

 sex, more strongly mucronated towards the end. 



The species and subspecies of Chalcocybebus , known to 

 me, may be easily distinguished by the following key^): 



a. Thorax smooth on the disk. 



b. Elytra with dots of white hairlike scales. 

 c. Femora red , the anterior ones in both 

 sexes hardly mucronated. 

 d. Elytra only near the apex with a 



white dot bispinosus Boisd. 



d'. Elytra not only near the apex with 

 white dots. 



e. Elytra with a white dot near the 

 apex and with a similar one on 

 the 3rd and 5th spatium behind 



the dorsal spine .... bispinosus gutiifer , m. 



e'. Elytra with a white dot near 

 the apex, with a transverse si- 

 milar one across the 3rd, 4th 

 and 5th spatium behind the dor- 

 sal spine, and with another on 

 the 4th spatium before this 

 spine bispinosus aruensis , m. 



e". Elytra with a white dot near 

 the apex, with a similar one 

 across the 4th and 5th spatium 

 behind the dorsal spine, and 

 with two others on the 4th spa- 

 tium before this spine, one of 

 which is placed at the base of 



the spatium bispinosus australis, m. 



c'. Femora , like tibiae and tarsi , black. 



f. Elytra with a white dot near 

 the apex, and with a similar 

 one on the 4th spatium before 

 as well as behind the dorsal 



spine bispinosus intermedius , m. 



1) Owing to the rarity of the CAalcoci/beb us -sjyecimens in collections, I 

 think it best to record by name every form which seems to be geographically 

 localized. 



Notes from the Ley den IMuseum, Vol. X.V1II. 



