130 



INJURIOUS IXSZCT5 



TEE 2n'0RTHEEX AR^IY TVORM. 



(Leucania unijjuncfa, Haw.) 



This insect lias from time to time made its appearance 

 in destructive numbers. Its earliest recorded ai ipearance 

 in the Eastern States, was in IT^o. The years ITTu. 

 ISIT. and 1S61, are those in which it is reportfd to have 

 been especially trotiblesome in the East: in Ibbl it was 

 destructive from Xcav England to Kansas- in 1ST5. it 

 visited a lai^ge part of ]\Essouri. and in 1880 was especially 

 destructive on Long Island. Prof. C. Y. Eiley was the 

 first to give the full history of this insect, in his Eeports 

 on the Insects of ]\Iissouri, and in the Walker Prize 

 Essay of the Boston Xatttral History Society^ for 18TT; 

 from these the following is condensed. 



DESCEIPTIOX or THE IX5ECT. 



The worm when full grown is dingy black in color, 

 striped as in figure 87, with a broad dusky stripe along 

 the back, divided along the middle by a more or less dis- 

 tinct and irregular pale line, and bordered beneath by a 

 narrow black line: then a narrow white hue: then a yel- 

 lowish stripe: then a narrow, indistinct white line: then 

 another dusky stripe: again a narrow white line: then a 

 yellow stripe, and, finally, again a faint white line: the 

 underside or venter is obscure green. 



The chiysalis (fig. 88) is mahogany-brown in color. 

 The moth (fig. 89) is of a fawn color, with a white speck 

 near the center of the fi^ont wings and a dusky, obli'jue 

 line running inwardly from their tips. 



The eggs are laid in the spring of the year so far as we 

 know, and not in the fall as was formerly supposed. 

 They are thrust, by means of an ovijiositor, which is 

 admirably adapted for this purpose, in between the folded 



