176 BOMBUS SENEX. 
A. L. van Hasselt and D. D. Veth, members of the Dutch 
Scientific Sumatra-Expedition, on the summit of the „Peak 
of Korintji” (the highest mountain of Sumatra, also called 
„Peak of Indrapoera”), 3690 Meter above the level of 
the sea !). 
When describing the Q of Bombus senex, Snellen van 
Vollenhoven has not made mention of the 8 received from 
Dr. Ludeking in the same lot of insects. 
This 8 measures about 18 mm. in length and is darker 
coloured than the Q. Its pilosity is fallow black except 
on the mesonotum where it is white. On the sides of the 
mesothorax and on the back of the abdomen the fallow 
black hairs are intermixed with numerous white or greyish 
white hairs. The colour of the legs agrees with that of the 
©, but the hairs on the posterior tibiae of the 3 are more 
rufous. The wings of the 8 are infuscate, especially at 
the base and apex; at the base an indistinct purplish hue 
is visible. 
Leyden Museum, March 1914. 
1) Later on it has been stated by the triangulation of Sumatra, that the 
exact height of this mountain is 3805 M. 
Notes from the Leyden.Museum, Vol. XXXVI. 
