No. 30.] 67 
LACHNUS, I11r1c. 
Spruce-rrer Lacunus, *L. abietis. Apterous females pubescent, 
broad oval, blackish clouded with lurid brown, with 
a faint cinereous dorsal vitta; venter lurid, pruinose, 
with a black spot near the tip; antenne sordid-white, 
with a black annulus at the apex of each joint. Length 
0:15 to tip of the abdomen. Occurs on the Abies nigra. 
No. 854, female. 
Oak-LEaF Lacunus, *L. quercifolia. Light yellow; antenne pel- 
lucid white, with a slender black annulus at the tip of 
each joint; fore wings with a blackish spot on the apex 
of each nerve and a deep black dot on the base of the 
curved apical nerve; stigma whitish. Length to tip of 
wings 0°15. On the leaves of the white oak. No. 855, 
male. 
Wittow Lacunus, *L. salicellis. Black; tibiee and base of the 
antenne obscure pallid; base and costal margin of the 
fore wings yellowish-white. Length 0-08. On the 
young succulent twigs of willow trees. No. 856, male. 
Auprr-Lear Lacunus, *L. alnifolie. Apple-green; antenne 
greenish-white, with four black annuli; legs greenish- 
white, tarsi, knees, and line on the posterior side of the 
tibie black; wings hyaline, the three oblique nerves 
black. Length,0-10. Onalder leaves. No. 857, male. 
Exm Lacunus, L. ulmi, (Linn.) Syst. Nat. ii. '733. Solitary, on 
the under side of elm leaves. No. 858, male. 
Porrar Lacunus, L. populi, (Linn.) Syst. Nat. ii. 736. On the 
under side of the young leaves of Populus grandidentata. 
No. 859, male ; 860, larva. 
ERIOSOMA. Leacu. 
AppLe-rree Buicut, E. lanigera, (Hausman.) Illiger’s Magaz. 
vol. i. p. 440. Myzoxylus mali, (Blot.) Mem. Soe. 
Agricult. de Caen, 1830, p. 38. On the bark of young 
branches of the apple, to which tree, in Europe, it has 
been a great pest. Commonly only solitary individuals 
are here found, and in but one instance, have I met 
with it clustered and covering a limb as described by 
foreign writers. No. 861, male. 
