THE ENTOMOLOGIST’S 
WEEKLY INTELLIGENCER. 
No. 226.] SATURDAY, FEBRUARY 2, 1861 [Pmoe Id. 
EH10Z0A, 
In another column will be found some 
notice of Mr. Lubbock’s observations 
(which have recently appeared in a 
detailed form in the ‘ Natural-History 
Review’) on a parasitic worm found 
in the interior of humble-bees. 
Some slight introductory notice on 
Entozoa in general may perhaps ren- 
der this subject more interesting to 
some of our readers than otherwise it 
would have been. 
Entozoa, generally speaking, would 
scarcely be a proper topic for our 
columns; but the occurrence of an 
Entozoon in considerable numbers in 
an insect so well known as a humble- 
bee must be our excuse for bringing 
these animals before the entomological 
i public. 
Entozoa are parasitic animals which 
infest the internal cavities and tissues 
of other animals: no less than four- 
teen well-established species occur in 
man, and almost every known animal 
has its peculiar parasite, and often 
more than one. 
These parasites are not to be con- 
founded by our less-experienced readers 
with the larvae of Diptera and of 
Hymenoptera, which infest parasitically 
the bodies of other insects. 
The Entozoa always retain the ver- 
miform nature, and do not develop 
into winged insects; though many of 
them undergo transformations far more 
singular than those of insects. 
“ Many Entozoa,” observed Professor 
Owen, in his Address to the British 
Association at Leeds, ‘‘ acquire their 
• full or sexual development, not as 
free worms, but within the body of 
another animal, and of a species dis- 
tinct from that in which they had 
passed the early or larval stage of 
their existence. 
“ The sum of recent researches on 
the generation of the Entozoa teaches 
that to the success in life of the ma- 
jority of these internal parasites, two 
different species of much higher organ- 
ized animals are subservient; and that 
these two species stand in the relation 
of prey and devourer. 
“ The habits of the prey favour the 
accidental introduction (as when a slug 
crawls over the droppings of a thrush) 
of the eggs of the bird’s intestinal 
