INJURIOUS HYMENOPTERA. 



Nematus Erichsonii Hartig. 



The Larch Saw-fly. 



(Ord. Hymenoptera : Fam. Tenthredinid.e.) 



Hartig: Die Familien der Blattwespen und Holzwespen, 1837, p. 187, No. 9 



(original descr.) ; in Stett. Ent. Zeit., i, 1840, p. 22. 

 Ratzeburg : Forstinsekten, iii, 1844, p. 121, pi. 3, f. 4. 



Hagen: in Canad. Entomol., xiii, 1881, p. 37 (identified in U. S.); in Kept. 



Comm. Agrieul. for 1883, p. 141-2. 

 Packard : in Eept. Comm. Agrieul. for 1883, p. 138, pi. 3, f. 1, pi. 13, figs. 



1-4 (history, habits, descr.) ; Bull. No. 3, Div. Entomol.— U S. Dept. 



Agrieul., 1883, p. 29 (in Maine); in Kept. Comm. Agrieul. for 1884, 



p. 377 (operations); in Amer. Nat., xviii, 1884, pp. 293-296, figs. ; in 



Kept. Comm. Agrieul. for 1885, p. 321 (operations) ; in Bull. 13, Div. 



Ent.— U. S. Dept. Agrieul., 1887, p. 20; Entomology for Beginners, 



1888, p. 166, f. 207. 



Fletcher: in Canad. Entomol., 1884, p. 215 (distribution in Canada; in 



Kept. Min. Agrieul. for 1884, p. 215 (distrib.) ; in 15th Kept. Ent. 



Soc. Ont., 1885, p. 22 (ravages of), pp. 72-77; Kept. Entomol. for 



1885, p. 28; id. for 1887, p. 35. 

 Fyles: in 14th Rept. Ent. Soc. Ont., 1884, p. 17 (in Canada); in Canad. 



Entomol., xv, 1884, p. 216. 

 Provancher: Addit. Faun. Hymenop. Can., 1885, p. 5, f . 1 ; in Nat. Canad., 



xv, 1885, pp. 45-53, figs. 8-11 (general notice). 

 Harrington: in Canad. Entomol., xxiii, 1886, p. 39. 



Lintner: in Entomolog. Amer., iii, 1887, p. 121 (in N. Y.); 4th Rept. Ins. 



N. Y., 1888, p. 16 • in 18th Rept. Ent. Soc. Ont., 1888, p. 32. 

 Jack: in 17th Rept. Ent. Soc. Out, 1887, p. 16. 

 Cresson: Synop. Hymenop. N. Amer., 1887, p. 158. 



Saunders : in 18th Rept. Ent. Soc. Out. , 1888, p. 31 (in Nova Scotia and New 



Brunswick). 



The larch saw-fly is a recently introduced pest, having been 

 brought from Europe, it is believed, into Massachusetts not long prior 

 to the year 1880 on some European larches. It has displayed a dis- 

 position for rapid distribution, as it has within the decade spread 

 and carried its ravages over a large part of New England, Canada, 

 and the State of New York. It will in the near future probably 

 extend its range over all that portion of the country where its food- 

 plant, the larch, occurs. Originally feeding in Germany on the La- 



