THE 



Pra^tticHl ®ntam0l00iBt 



A MONTHLY BULLETIN, 



Publislied by tlie Entomological Society of Philadelphia, for the dissemination of valuable 

 knowledge among Agriculturists and Horticulturists. 



Vol. I. 



SEPTEMBER 29, 1866. 



No. 12. 



^^r- Published at the Hall of the Society, No. 518 South 

 Thirteenth Street, where all (except Western) communi- 

 cations should be addressed. 



^^* Terms — 50 cents a year, iri advance. 



J^' All subscrijjtions must date from the commence- 

 ment of the volume. 



^^§*Our Western Correspondents will please send their 

 communications direct to Benj. D. Walsh, M. A„ Associate 

 Editor, Rock Island, Illinois. 



E. T. CRESSON, ) Publication Committee 



AUG. R. GROTE, \ and 



J. w. McAllister, j editors. 



BENJ. D. WALSH, Rock Island, Illinois, 



Associate Editor. 



PHILADELPHIA, SEPTEMBER 29, 1866. 



We take pleasure in announcing that, although the de- 

 sired number of subscribers is not yet made up, we shall 

 continue the publication of the Practical Entomologist an- 

 other year, because we believe that, through the continu- 

 ed exertions of our friends, we shall have 5000 names by 

 the issue of the October number. Therefore, those who 

 have sent in their names as subscribers for the second 

 year, may, if they feel so disposed, send us their subscrip- 

 tion money now, or, on the receipt of the October num- 

 ber. In remitting the money, please do not send us mu- 

 tilated or defaced currency. 



_^®'We shall always be happy to furnish any one, 

 who may wish to as,sist us by getting up a club of sub- 

 scribers, with specimen copies of the paper, and also co- 

 pies of our Prospectus. 



^©"Subscribers who have failed to receive the num- 

 bers of the Practical Extomologist, regularly, or who 

 have received incomplete numbers, will please inform us. 



THIS NUMBER 

 is occupied chiefly by a long, valuable and interesting 

 article by Mr. Walsh on the Natural History of the Saw- 

 fly of the Gooseberry and Currant. As this Insect Pest 

 promises to do an immense amount of damage, it would 

 be well for everyone who cultivates the fruit to read the 

 article over carefully. Several interesting communica- 

 tions and answers to correspondents have been crowded 

 out, but these will appear in the next number. 



IMPOETED INSECTS;— The Gooseberry Sawfly. 



BY BENJ. I). WALSH, Sf. A. 



It is a remarkable fact, that fully one-half of our 

 worst Insect Foes are not native American citizens, 

 but have been introduced here from Europe. The 

 Hessian Fly (^Cecidomyia destructor Say) was im- 

 ported almost ninety years ago — the Wheat Midge 

 (Di'plosis tritici Kirby) about half as long ago — 

 the Bee Moth {Galleria cereana Fabr.) at the be- 

 ginning of the present Century — the Codling Moth 

 {Carpocapsa pomonella Linn.), the Currant Borer 

 ( Trochilium tipuliforme Linn.), the Bark-louse of 

 the Apple tree (^Aspidiotus conchiformis Gmel,), 

 the Cheese-maggot ( Piophila casei Linn.), the 

 Meal-woim {^Tcnebrio moHtor Linn.), the Grain- 

 weevil (^Sitophilus granariiis Linn.), the House-fly 

 (Afusca domestica Linn.), the Leaf-Beetle of the 

 Elm (^Galeruca cahnariensis Fabr.), the Cockroach 

 (Blatta orlentalis Fisch.), and the different Carpet, 

 Clothes and Fur Moths, at periods which cannot 

 be definitely fixed. And even within the last few 

 years the Asparagus Beetle {Crioceris asparagi 

 Linn.) has made a lodgement in the State of New 

 York, and will no doubt gradually spread westward 

 from that point through the whole LTuited States. 

 I now have to record the appearance among us from 

 across the Atlantic of a bitter enemy to the Goose- 

 berry and Currant — the Gooseberry Sawfly. 



One would suppose at first sight, since there are 

 about as many voyages made from America to Eu- 

 rope as from Europe to America, that we should 

 have reciprocated to our transatlantic brethren the 

 favors which they have conferred upon us, in the 

 way of Noxious Insects. It is no such thing. 

 Neither the Chinch Bug {3Iicropus leucopterus 

 Say), nor the Curculio {Conotrachelus nenuphar 

 Herbst), nor either one of our two principal Apple- 

 tree borers (^Saperda hivittata Say and Chryso- 

 hothrisfemorata Fabricius), nor the Cankerworm 

 {Anisopteryx vernata Peck), nor the Apple-tree 

 web-worm {Clisiocampa americana Harris), nor 

 the Peach-tree borer ( Trochilium exitiosuni Say), nor 

 any other of our Native American Insect Foes has 

 ever, so far as I am aware, emigrated from this 



