144 Annals Entomological Society of America [Vol. X, 



EXPLANATION OF PLATES. 



Plate X. 



Lachnus coJoradensis, n. sp. Ijf'aciult fundatrix, X 7; la, cauda of fundatrix, 

 X 40; lb, Cauda of fundatrix (side view); Ic, gonopophyses of apterous viviparous, 

 X 70; 2, antenna of fundatrix, X 40; 3, cornicle of fundatrix; 4, 3^oung, second gen- 

 eration, one-third grown, X 7; 5 antenna of apterous viviparous, X 40; 6 alate 

 viviparous, second generation, X 7; 7 cornicle of alate viviparous, X 40; 8, terminal 

 three joints of the beak, X 40 (alate); 9, tarsal joints of alate viviparous, X 40; 

 10, antenna of alate viviparous, X 40; 11, oviparous female, X 7; 12, antenna of 

 oviparous female, X 40; 13, tibia of oviparous female, X 23; 14, eggs laid on spruce 

 needles, X 5; 15, antenna of male, X 40. 



Lachnus palmer ce, n. sp. 16, fundatrix, first instar, X 13; 16a, fundatrix, X 7; 

 17, gonopophyses of fundatrix, X 40; 18, cornicle of fundatrix, X 27; 19, antenna of 

 fundatrix, X 40; 20, young of second generation, one-half grown, X 7; 21. alate 

 viviparous, second generation, X 7; 21a, cauda of alate viviparous, X 33; 21b, 

 cauda of alate viviparous, side view; 22, antenna of alate viviparous, X 40; 23, 

 terminal three joints of beak of alate viviparous, X 40; 24, oviparous female, X 7; 

 25, antenna of oviparous, X 40; 26, hind tibia of oviparous, X 23; 27, twig of Picea 

 engelmanni with eggs and oviparous female, X 3; 28, egg, X 7; 29, male, X 7; 30, 

 antenna of male, X 40. Original; Miriam A. Palmer, Delineator. 



Plate XL 



Lachnus hraggii, n. sp. 1, fundatrix, X 7; 2, cornicle of fundatrix, X 40; 3, 

 terminal three joints of beak of apterous viviparous, X 40; 4, antenna of fundatrix, 

 X 40; 5, antenna of apterous viviparous, X 40; 6 young of third generation, one- 

 third grown, X 10; 7 alate viviparous, third generation, X 7; 8, antenna of alate 

 viviparous, third generation, X 40; 9, cauda of apterous viviparous, X 40; 9a, 

 cauda of apterous viviparous, side view, X 33; 9b, gonopophyses of apterous 

 viviparous, X 40; 10, tarsal joints of alate viviparous, X 40; 11, oviparous female, 

 X 7; 12, antenna of oviparous female, X 40; 13, tibia of same, X 40; 14, egg of same, 

 X 7; 15, male, X 7; 16, antenna of same, X 40. 



Lachnus tomentosus. 17, young fundatrix, X 13; 18, adult fundatrix (with cot- 

 ton removed), X 8; 19, same with cottony covering on pine needle, X 4; 20, antenna 

 of same, X 40; 21, alate viviparous with cottony covering, X 8; 21a, gonopophyses 

 of same, X 100; 22, cornicle of apterous viviparous, X 40; 23, terminal three joints 

 of beak of oviparous, X 40; 24, alate viviparous antenna, X 40; 25, oviparous 

 female, X 8; 26. antenna of same, X 40; 27, hind tibia of same, X 40; 28, cauda of 

 apterous viviparous, X 40; 29, egg, freshly laid, not yet covered with waxy 

 secretion, X 8; 30, eggs on needle covered with waxy secretion; 31, antenna of 

 male, X 40. 



Lachnus ponderosce Williams. 32, apterous viviparous second generation, X 8; 

 33, antenna of same, X 40; 34, cornicle of same, X 33; 35, terminal three joints of 

 beak of same, X 40; 36, young of third generation, X 10; 37, alate viviparous, 

 second generation. X 8; 38, tarsus of same, X 40; 39, gonopophyses of same, X 66; 

 40, cornicle of same, X 33; 41, antenna of same, X 40; 42, cauda of same, X 40; 

 43, tibia of oviparous, X 40; 44, antenna of male, X 40. Original; Miriam A. 

 Palmer, Delineator. 



