Sentence:  The sure test of the presence of the disease is found in the dead body of the larva, which is dark and discoloured; and if a toothpick or pin be thrust into it and then drawn back, the body contents will <WSD>adhere</WSD> to it in a stringy mass, to the extent of a half or even an entire inch, as if it were mucous or glue; later the bodies of the larvae dry and appear as black scales in the cell bottoms. 
Meaning of the word marked with <WSD> tags:  To stick fast or cleave, as a glutinous substance does; to become joined or united.