322 



In the life history of insects the eggs are tbe tirst 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 ])upa, is the tbird section. The perfect 

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

 Neither tbe egg, tbe pnpa, or tbe imago ever grow. Neither do either of the first 

 three sections mate or lay eggs, rhe commou grasshopper is tbe larva. It never 

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

 neitber does it ever mate or lay eggs. It is tbe pupa. Tbe flying grassbopper is the 

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

 witness to tbe change that is now to be made can ])nt a box into bis pastnre 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 be may be quite sure of 

 being gratified. The change of the cricket totlie flying gra,ssbopper is etfected in tbe 

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



Akciiibald Stoxe. 



GENERAL NOTES. 



LATE IMPORTANT PUBLICATIONS RELATIVE TO THE HESSIAN FLY. 



E. A. Ormerod. — Hessian Fly. 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. — Ueberdas Vorkommen derHessenfliege an wildwachsenden Gra'sern, 



(Entom. Nacbr. XIV, No. 16, Aug., 1888, p. 242-24:}.) 

 S. A. Forbes. — A new parasite of tbe Hissian Fly. {Psyche, Vol. V, No. 144, April 



1888, p. 39-40.) 

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



1888, p. 202-203.) 



lu the above-named articles, wbicb were published within a few 

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

 facts in the natural history of the Hessian FI3' have been brouglit 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 tbe fly wbicb inclines me to conjectui'e it is American. 



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

 from the New Zealand tly, 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 Russia. 



