THE CANADIAN ENTOMOLOGIST. 19 



Nova Scotian Hymenoptera. — In a collection of Nova Scotian 

 Insects, entrusted to me by J. Matthew Jones, Esq., of Halifax, Nova 

 Scotia, are the following species, which Fred. Smith, Esq., of the British 

 Museum, has kindly named. I hope, shortly, to forward a list of addi- 

 tional species :- 



Alia nt us Zona / King. Nomada Americana, Kirby. 



Ammophila uran/'a, King. Andrma vicina, Smith. 



Vespa armaria, Fabr. Halictus parallelus, Sauss. 



Yespa bo real is, Klug. Bo nib us vagans, Smith. 



Odynerus albophaleratus , Sauss. " tcrricola, Kirby. 



Sphecodes dic/iroa, Smith. " fervens, Fabr. 



Megachile obtusa, Smith. " ornatus, St. Farg. 



Nov., 1871. F. Walker! 



Pieris rapJe Parasite.— It will doubtless be an interesting item of 

 intelligence to many of the readers of the Naturalist, that the parasite, so 

 anxiously looked for, as the only hope of preserving the cabbage crop of 

 our country from the destruction threatened it by the ravages of Pieris 

 rupee, has already entered upon its labours, and in so efficient a manner 

 as to promise immediate beneficial results. 



During the latter part of September, I was informed that a number of 

 chrysalids of P. rapa-, which had been collected by a gentleman in this 

 city, with a view of obtaining specimens of the imagines for drawing, instead 

 of disclosing the butterfly, gave out a number of small flies from each. 

 Some of them having been brought to me in compliance with my request, 

 I was delighted to find them to be of the genus Pteromalus which includes 

 so many of our valued parasitic friends, and probably of the species which 

 has been found so serviceable in Europe, in destroying the several cabbage 

 butterflies there existing— viz., the Ptpuparum of Linnaeus. 



From the close resemblance which many of the Pteromali bear to one 

 another, it is not safe to assert positively that we have really been favoured 

 with the importation of the European parasite, to aid in the work of sub- 

 jugation of the European pest, but should further examination prove this 

 to be the case, it will be not only a most interesting event in its scientific- 

 aspect, but also in the pecuniary results which must necessarily follow it. 



In another number, I may give your readers the observations — quite 

 limited, I regret — which I have been able to make on this welcome para- 

 site. — J. A. Lintner, N. Y. State Museum of Nat. Hist. 



[We have also raised this parasite in considerable abundance, and also 

 received specimens from Vermont. We have likewise reared a Dipterous 

 parasite from the cocoons. Eds.] — American Naturalist 



