iKflfi.] 29 
much shrunk that it lay in the ceutre of the cocoou with much room to 
spare. If the larva be allowed to remain in its cocoon till this stage of 
its economy is reached, and it be then turned out, though it has no 
power to construct another cocoon, it is yet able to assume the pupa 
state, and being acquainted with this fact, I cut open the cocoon and 
gently ejected the larva, when, on measuring it, it was found to be only 
two lines long, and one line wide in its stoutest part, having thus lost 
just half its length by the peculiar shrinking process it had undergone, 
and the body was also of a paler yellow than it had been when in con- 
structing the cocoon. At this time it lay quite motionless. The fol- 
lowing day the head became slightly swollen, and gradually the four 
anterior segments assumed the same swollen appearance ; the posterior 
segments also became slightly swollen, but not nearly so much so as the 
four anterior segments. Doubtless the convex form of the cocoon is 
designed by the larva to allow ample room for this change in its form. 
At this stage I perceived a pale reddish patch at the back of the 
head, which I apprehended was the first indication of the reddish tuft 
on the head of the imago. 
The swelling of the anterior segments continuing, eventually caused 
the larval skin to crack, and the larva then began to enter the pupa 
state. The head had a pale reddish blotch on the back, but on the front 
only the faint reddish outlines of a couple of spots were indistinctly 
traceable. The larval skin slowly contracting, ultimately collected in a 
little heap at the posterior end of the pupa. 
(To be concluded in our next.) 
AN ESSAY TOWARDS A KNOWLEDGE OF BRITISH HOMOPTERA. 
BY THE BEV. T. A. MARSHALL, M.A. 
(Continued from page 12. j 
16, — lassus (I.) attenuatus, Germ. 
Augustus, elongatus, albidus, nitidulus, longitudinaliter testaceo- 
striatus. Vertex obtuse trigonus, transversus, pronoto brevior ; apex 
striis 2 brevibus punctisque totidem ante oculos lateralibus fuscis, 
inconspicuis : supra lineis 3 testaceis. Pronotum lineis 5, scutellum 2, 
longitrorsum ductis, testaceis. Hemelytra abdomine longiora, apice 
perquam attenuata, lanceolata ; nervi albi, interstitiis linearibus, testa- 
ceis; cellula apicalis elongata, fusca,cum cellulaprfecedentesub-infuscata 
