322 



In the life history of insects the eggs are the first section. The eating and grow- 

 ing section, known as the larva, is the second section. The intermediate section be- 

 tween the larva and the imago, known as the pupa, is the third section. The perfect 

 insect is known as the imago. The whole growth of all insects is made by the larva. 

 Neither the egg, the pupa, or the imago ever grow. Neither do either of the first! 

 three sections mate or lay eggs. The common grasshopper is the larva. It never 

 mates or lays eggs. Its whole work is to eat and grow. The cricket never grows, 

 neither does it ever mate or lay eggs. It is the pupa. The flying grasshopper is the 

 imago. It never grows, but mates and lays the eggs. Any one wishing to become a 

 witness to the change^that is now to be made can put a box into his pasture where 

 there are plenty of grasshoppers and go to it every morning before sunrise, after the 

 first week in September or during the second week, and he may be quite sure of 

 being gratified. The change of the cricket to the flying grasshopper is eff'ected in the 

 cricket's burrow in the ground and is not so easily witnessed. 



Archibald Stone. 



GENERAL NOTES. 



LATE IMPORTANT PUBLICATIONS RELATIVE TO THE HESSIAN FLY. 



I 



E. A. Ormerod. — Hessian FJy. Report on insects injurious to wheat plants in New 



Zealand. (4 folio pages, dated April 11, 1888, with a figure of Howard's plow 



appended on fifth page.) 

 Karl Lindeman. — Ueber das Yorkommen derHessenfliege an wildwachsenden Gra'sern. 



(Entom. Nachr. XIV, No. 16, Aug., 18S8, p. 242-243.) 

 S. A. Forbes. — A new parasite of the Hessian Fly. (Fsyclie, Vol. V, No. 144, April 



1888, p. 89-40.) 

 Fred. Enock. — Parasites of the Hessian Fly. (The Entomologist, Vol. XXI, Aug., 



1888, p. 202-203.) 



In the above-named articles, which were published within a few 

 mouths of each other duriug 1888, several interesting points and new 

 facts in the natural history of the Hessian Fly have been brought out. 



After a careful comparison of imagos and upon examination of infested 

 wheat straws, both received from New Zealand, Miss Ormerod declares 

 that the New Zealand insect is indistinguishable from the genuine 

 Cecidomyia destructor. This sudden appearance of the Hessian Fly in 

 such a remote part of the globe, coming so shortly after its appearance 

 in England, can not fail to attract general attention. That the insect 

 has been introduced into New Zealand can not, we think, well be dis- 

 puted, and it is quite likely that such importation took place from 

 England and not from North America. Miss Ormerod seems to have 

 some doubts on this question, since she says : 



I notice a small point about the fly which inclines me to conjecture it is American. 



At any rate a study of the parasites, which will no doubt be bred 

 from the New Zealand fly, will definitely settle this question, as it was 

 the case when the Hessian fly appeared in England. It will be remem- 

 bered that an inspection of the parasites bred in England enabled us 

 to decide that the Hessian fly must have been introduced into England 

 not from North America but from Kussia. 



