• WordNet 3.6
    • n Bombus bumblebees
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Century Dictionary and Cyclopedia
    • n bombus In pathology: A humming or buzzing noise in the ears.
    • n bombus A rumbling noise in the intestines; borborygmus.
    • n bombus [capitalized] A genus of bees, family Apidæ, containing the honey-producing aculeate or sting-possessing hymenopterous insects commonly called bumblebees. See bumblebee, and cut under Hymenoptera.
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In literature:

Apathus (= Psithyrus) lives in the nests of Bombus.
"More Letters of Charles Darwin" by Charles Darwin
Apathus, living in nests of Bombus.
"More Letters of Charles Darwin Volume II" by Charles Darwin
With possibly one or two exceptions, the only species I have seen doing the puncturing is Bombus affinis, Cresson.
"Scientific American Supplement, No. 841, February 13, 1892" by Various
The last chapter is on Bombus, the Bumblebee.
"A Mother's List of Books for Children" by Gertrude Weld Arnold
A large sooty-black Bombus represents our humble-bee.
"The Andes and the Amazon" by James Orton

In news:

Of the five species of North American Bombus bumble bees, two are facing steep population declines and one may be extinct.