758 Journal of Agricultural Research voi.xx, No. 10 



which was conspicuous early in the disease when the larvae were yellow 

 and more noticeable later when the larvae became darkened. The wilt 

 was rather widespread in this locality of infestation, but though it killed 

 a considerable quantity of the larvae yet its success was limited. 



From our notes and rearing records it would seem that none of the in- 

 sect parasites were abundant enough nor was the wilt sufficiently dis- 

 tributed and infectious to account for the periodic disappearance of this 

 species. It is certain that neither any nor all of these natural checks are 

 sufficiently numerous or effective to admit disregard of the artificial 

 control measures suggested below. 



DISTRIBUTION 



Neodiprion lecontei was described by Fitch from specimens collected 

 in New York, while Riley and Norton mentioned specimens coming 

 from Ridgewood, N. J. The localities represented in the United States 

 National Museum collection are Baltimore, Md., and Virginia (near the 

 District of Columbia), material collected by Theo. Pergande; and Long 

 Island, N. Y., material collected and reared by H. G. Dyar. The "Guide 

 to Insects of Connecticut" ' records the sawfly from Middletown, 

 Hampton, and Stamford, for that State. To these localities, through 

 collecting by members of the Bureau of Entomology and correspondents, 

 the following localities have been added (fig. 3) : 2 



Connecticut: Cheshire, Deep River, Ellington, New Haven, Norfolk. 

 District of Columbia: Throughout. 

 Louisiana: Clinton. 

 Maryland: Yarrow, Plummers Island. 

 Michigan: Remus. 

 Mississippi: Orange Grove. 

 New York: Hyde Park (Dutchess County). 

 North Carolina: Pinehurst. 



Pennsylvania: Austin, Linglestown, Reading, West Chester. 



Virginia: Falls Church and vicinity (generally throughout Arlington and Fairfax 

 Counties). 



West Virginia: Kanawha Station. 



Wisconsin: Generally throughout Oneida and Vilas Counties. 



ECONOMIC IMPORTANCE 



This species does considerable damage to both natural reproduction 

 and nursery stock by defoliating the trees. Complete or nearly com- 

 plete defoliation before late summer usually kills that part defoliated; 



1 Viereck, Henry Lorenz, et al. guide to the insects of Connecticut, part hi. the hymen- 

 optera, or wasp-like insects, of Connecticut. Conn. State Geol. and Nat. Hist. Survey Bui. 22, 

 p. 44. 1916. 



'Since this manuscript has been prepared this species has been received from the following additional 

 localities: 



Connecticut: Hartford. 



Florida: Orlando. 



New Hampshire: Wonalancet. 



Pennsylvania: Clearfield, New Germantown. 



