1 9G [February, 
Two or three examples iu Prof. Westwood's collection, found 
living in boxes of exotic (in one case Egyptian) insects ; one in Mr. Dale's 
collection. If it be not indigenous in England, it is, at any rate, na- 
turalised here. The original example was found by Motschulsky in a 
box of Californian insects. It bears a remote resemblance to the 
Coleopterous genus JVbssidium. 
[Genus Lachesis, "Westwood {LacTiesilla, Hagen.; This genus 
is characterized by Westwood ("Introduction" vol. ii., p. 19-20) as 
having 2-jointed tarsi, slender femora, and rudimentary wings (see 
also fig. 59, 13, 16, 17, and 18). 
I have come to the conclusion that the genus is founded on in- 
complete evidence. I have examined the types of L. Jatidica under the 
microscope, and made the following notes. The type-specimens are two 
fixed on the same card. The larger one has no ocelli, no rudiments of 
wings that I can detect, 2-jointed tarsi, a large head with strongly 
developed front or nasus, and free thoracic segments. There is nothing 
to indicate that it is a fully developed insect, and I look upon it as a 
very immature form, or larva, of one of the Psocina. The other, or 
smaller example, is a very different creature ; the head large and trian- 
gular, with evident ocelli ; the tarsi 2-jointed, and with evident reticu- 
lated wings. That this is a micropterous form of one of the Psocina I 
do not doubt. On Professor Westwood's drawings of these creatures 
it is noted that " one of each (form) was found on a piece of cheese 
from a damp cellar." That this latter form is a condition of Ccecilius 
pedicidarius appears probable. 
In Professor Westwood's collection I see also another example, 
which appears identical with the smaller of the two types of L. fatidica, 
in better condition, and this bears four small wings, but the neuration 
offers no guide as to whether it be a form of G(BciUus ; there is an 
evident pterostigma. 
In the absence of further information, it seems desirable to omit 
Lachesis for the present.] 
Genus Psoquilla, Hagen (1866). 
Tarsi 3-jointed ; femora only slightly dilated. Head cordate. Eyes 
large. Palpi with dilated apical joint. Antennae with stout basal joints, 
and slender, multi-articulate thread. Abdomen broad, sub-depressed. 
Wings (I can see no vestige of posterior wings) about as long as the 
abdomen, elliptical at the apex, membranous ; neuration evident but 
simple ; the veins and margins ciliated. 
