102 ENTOMOLOGICAL SOCIETY 
Mr. Schwarz exhibited a box of Theodosia JHelionica) 
beetles from Mount Kina-Balu, North Borneo, and spoke on the 
genus and on the characters used for the distinction of species. 
The genus is one of the few Cetoniid genera that are armed 
in the male with one cephalic and one thoracic horn, thus 
resembling the well known genus Dynastes of another sub- 
family of the Scarabaeidse, viz, the Dynastinae. With the 
exception of a single species the genus is peculiar to Borneo, 
and up to quite a recent date specimens were extremely rare 
in collections. Last year Messrs. Goss and Dodge donated 
to the National Museum a fine collection of Mount Kina-Balu 
insects, among which were no less than 359 male specimens 
of these Theodosia beetles. Mr. Schwarz finds that the most 
elementary and most readily observable character, viz, the 
sculpture of the upper side, is absolutely safe to separate one 
of the species, T. westwoodii, from the rest. There were 
266 specimens of this species, which is always recognizable 
from the double punctuation of the thorax (smaller and 
larger punctures intermixed) and from the peculiar punctuation 
of the elytra (the punctures being imperfect and umbilicate, 
i. e., there is a semicircle open behind), and with a small punc- 
ture in the center. The horns of this species show an enormous 
extent of variation as to length and curvature, but the cephalic 
horn is always simple, i. e., not bifurcate. The second series 
of species is always characterized by uniformly dense granula- 
tion of the thorax and by the elytra not having any punctures 
at the surface. The substance of the elytra is transparent 
and the peculiar sculpture can easily be seen within the elytra, 
although the punctures do not reach the surface. Several 
species have been made of this set, and it is worth while to 
record the differences. T. magnified Rothschild, represented by 
69 specimens, has the cephalic horn simple; T. telifera Bates 
has, on the other hand, the cephalic horn bifid, but there is 
not the slightest other difference between the two forms, so 
that when, as frequently happens, the cephalic horns get 
broken off, the two forms cannot be distinguished. To make 
the matter more interesting, each of these two forms has a 
companion form distinguished at the first glance by a dense 
