STATE HORTICULTURAL SOCIETY. 173 



wingless individuals are about one-eighth of an inch long, brownish-black, 

 with a white line along the middle of the throax, and white spots along 

 each side of the abdomen, but the. latter are sometimes very dim, or 

 wanting; antennae pale with the tips black. Dr. Fitch says it is a verv 

 common thing to find winged individuals with the third vein of the fore 

 wing but once forked, showing the very close relation of this species to 

 the Woolly Plant-lice {Eriosoma). It is possible that this may yet prove 

 to be identical with the LacJwus pini oi Europe. 



53. Lachnus caricifex, Fitch. The Larch Aphis. 



This species is usually found solitary on the small twigs of the 

 American larch (Tamarack), stationed chiefly in the axils of the tufts of 

 leaves. The wingless individuals, which are the only ones as yet de- 

 scribed, are of a brownish color, often with a slight coppery tinge ; length, 

 about one-eighth of an inch ; with a dull white line along the middle of 

 the back, and a similar whitish band at the sutures of each of the abdomi- 

 nal segments ; in these bands there are three black punctures on each 

 side of the middle ; the short tubercular honey-tubes deep black ; the 

 under side dull white and dusted with white powder; the legs pale, with 

 the feet and knees black. According to Dr. Fitch, from whose report 

 the above description is taken, many of these insects were noticed on a 

 particular tree in May, but no winged ones among them. Many of them 

 were accompanied by four or more young, huddled close around the base 

 of the sheath from which the leaves arise. These were dull yellow, with 

 two brown spots on the abdomen, near the base. 



54. Lachnus abietis, Fitch. The Spruce-tree Lachnus. 



Occurs on the ahies nigra. The wingless females are pubescent, 

 broad oval, blackish, clouded with brown, with a faint ashy stripe on the 

 back; under side mealy, with a black spot near the tip; antennae dull 

 white, with a black ring at the tip of each joint. Length to the tip of 

 the abdomen, 0.15 inch. Whether this is the L. abietis of Walker or 

 not, I am not at present able to state. 



55. Lachnus quercifolicc, Fitch. The Oak-leaf Lachnus. 



Found on the leaves of the white oak (Quereus alba). Light yel- 

 low ; antennae watery-white, with a slender black annulus or ring at the 

 tip of each joint; fore wings with a blackish dot on the base of the 

 curved apical vein ; stigma whitish. Length to the tip of the wings, 

 o. 15 inch. 



56. Lachnus alnifolice, Fitch. The Alder-leaf Lachnus. 



Found on alder leaves. Green ; antennae greenish-white, with four 

 black rings ; legs greenish-white ; feet, knees and a line on the posterior 

 side of the tibiae, black ; wings hyaline, the discoidal veins black. 



Length, o. 10 inch. 



