DISTRICT OF LULEA.
(Here follow, in the manuscript, sketches of the leaves, with Latin descriptions, of Salix phylicifolia β, pentandra, caprea and myrtilloides, to be found more complete in the Flora Lapponica.)
Close to the shore, on the right of the ferry of Gaddewick, is a considerable spring, named Kall Källa, or Cold Spring, having a strong current and abounding with ochre, which is deposited abundantly along its course. The water bears a silvery film, and has a mineral taste, though not a strong one. It gushes forth with impetuosity, and never freezes in its course to the river, which is about eighteen ells distant. No high hill is near, but it springs
from a swelling bank about two ells in perpendicular height above the level of the river. The mouth of the spring is towards the north-east. The inhabitants use it for washing.
In places near the highway, where the people had laid bridges, the soil appeared very thin. The gravel and sand were commonly about a span deep in moist places; in dry ones much more. The clay was often two ells in thickness, under which gravel again occurred. Between the dark-coloured sand and the clay, as well as where the clay terminated, especially near the sand, runs water, which deposits clay, as the abovementioned spring does ochre.
I noticed the following insects.
1. A large black Capricorn Beetle, variegated with a lighter hue. (Cerambyx Sutor, the female.) The horns were longer than the body, black, consisting of ten joints, each joint ash-coloured at its base. Body black, rugged, its wing-cases besprinkled here and there with clustered dirty spots. Abdomen cylindrical, covered towards the thorax with beautiful red lice, (Acarus coleoptratorum).
2. A minute black fly, with a roundish body and white wings, (Culex equinus). This infested the horses in infinite multitudes, running under their mane, and attacking them with great fierceness, being not easily driven off. ([See its figure subjoined to the former].)