vill BOMBUS SYLVARUM IgI 
14. BOMBUS SYLVARUM, Linnzus. 
Shrill Carder-bee. 
QUEEN.—Small; length 16-18 mm., expanse 209- 
32 mm. 
The prevailing colour is greenish-white, often with a 
yellowish tinge. On the top of the head and in the centre 
of the thorax this colour shades into black. On the 2nd seg- 
ment of the abdomen there are traces of a black band, at least 
at the sides; the 3rd segment is black with a narrow band 
_of greenish-white at its edge; 4th and following segments 
orange, each with a narrow band of greenish-white at its 
edge. 
The pale colour on the 2nd segment often shades into 
a deeper, more distinctly yellow tint, and there are often 
packs hairs at the base of the 4th segment. 
Coat rather thin and uneven, not long. 
WORKER.—Length 10-15 mm. 
Resembles the queen except in size. 
MALE.—Length I 3-14 mm., expanse 23-26 mm. 
Coloured like the queen, but the red on the 4th segment 
is generally displaced by black. 
Quality of coat as in B. derhamellus. 
Antenne as in derhamellus, but the 3rd joint very 
little longer than the 4th. 
Armature distinct, but approaching that of &. der- 
hamellus. 
This species is widely distributed in England 
and Ireland, and common in a good many places, 
but it appears to be rare in Scotland, and has not 
been found in the north of Scotland. The queens 
and workers are very agile, both in the nest and 
on the wing, and their hum is more shrill than that 
of any other species. The nest is usually on the 
