304 



Mr. O. E. Janson on the genus 



Considerable trouble has been experienced in the identifi- 

 cation of the species of this genus largely owing to the 

 confusion occasioned by Dr. Kraatz in using the preoccu- 

 pied name urstwoodi, and in giving distinctive names to 

 slight variations and degrees of development. After a 

 careful study of the rather large material I have had an 

 opportunity of examining and the various descriptions, I 

 am only able to adopt five out of the nine names that 

 have been published, as representing distinct species, and 

 these only, with the two new species now added, are in- 

 cluded in the following tabulation which I have drawn 

 up of their most prominent male characters. Female 

 specimens are rarely received, and it is very difficult, or 

 almost impossible, to decide with any amount of certainty 

 to which species they pertain. 



. Ceplialic horn acute at apex. 



A. Anterior tibiae bare. 



a. Angles of clypeus strongly 

 produced, spiniform . . . 



b. Angles of clypeus only 

 slightly produced, obtuse. 



art. Thoracic horn without 

 prominences near apex . 



hi). Thoracic horn with a 

 small prominence on 

 each side near apex . . 



B. Anterior tibia; densely pilose 

 on inner side 



Cephalic horn bifid at apex. 



A. Anterior tibiae densely pilose 

 on inner side 



B. Anterior tibitc bare. 



rt. Thorax green, sub-opaque . 

 h. Thorax brassy, very polished 



hoivitti, Cast. S. Borneo. 



iiiestwoodi, Thoms. N. Borneo. 



mcKjniJica, Roths. N. Borneo. 

 jjeraJiensis, Moser. Perak. 



rothschildi, Jans. N. Borneo. 



telifer, Bates. N. Borneo. 

 anrata, Jans. N. Borneo. 



The other names that have been given in the genus 



are 



T. weshvoodi, Kz. This is evidently identical with jnagni- 

 fica, Roths., the latter name having priority. I think this 

 species may perhaps prove to be merely a variety of west- 

 woodi, Thoms., when we have an opportunity of examining 

 a larger series. 



H. waterstradii, Kz. This is the larger highly developed 



