156 THE CANADIAN ENTOMOLOGIST. 



Stett. Ent. Zeit, 1850, p. 335 : 



" Carpocapsa pomonana W. V. 



" I examined with much interest, in the Museum in Breslau, Prussia, 

 the specimens of hair worms communicated by different persons. Those 

 worms were found living in the heart of the apple some years ago, very 

 frequently in Silesia (by F. S. Leuckart, Zoolog. Bruchstuecke, Heft I., 

 1S20, p. 5). Four of them belong to Mermis acuminata, and others also 

 to Mermis ; also a specimen in Prof. Otto's collection. The Filaria 

 found in an apple by Prof. Waga will probably also be a Mmuis (Revue 

 Zool., 1844, p. 366).'' 



As I have given attention to all 1 found published about Helminthes 

 in insects, I remembered to have seen some other facts stated about their 

 presence in apples. But in comparing my notes I cannot find the work, 

 and the most thorough research in old and new books was without 

 success. So, till now, the above given quotations from Prof, von Siebold 

 are the only ascertained ones. 



Stett. Ent. Zeit, 1854, p. 106 : 



" I saw in some letters sent to me that it seemed to be inconceivable 

 to several Entomologists to understand how those worms can immigrate 

 into larvae, which from the beginning of their existence live in buds or in 

 fruits, and which never leave these trees or shrubs on which the eggs were 

 laid. Though we have no direct observations how the Mermis immi- 

 grates into the caterpillar living in the apple or in the pear, I do not at 

 all think that we are obliged to accept a spontaneous generation. We 

 know very well that a number of lower animals leave the egg very far from 

 the place where they shall live, and that they are obliged to make com- 

 paratively long journeys to reach the plate destined for them. For 

 instance, the Cicada, the larva of which is obliged to go into the earth, 

 though the eggs are laid on high trees. Why should not the brood of 

 Mermis generated in the earth migrate in the opposite way on Mowers and 

 trees to reach their proper abode? In the spring at certain times the 

 whole superficies of plants is humid and preserves the worms from drying 

 up. This supposition is corroborated by the observation of Prof. Creplin 

 concerning the migration of another worm." 



In a later paper, /. c. p. 32, it is stated by direct observation in Eng- 

 land and Germany that after strong rams the brood of Mermis comes out 

 of the earth and travels on flowers and shrubs in such numbers that the 



