64. Microscopical Society. 
CALAMOHERPE LonerIRostRis. Cal. vittd pallidd, supra oculos cer- 
vind; corpore superne rufo, subtiis saturate cervino; mento albido. 
Faint line over the eye fawn-colour ; all the upper surface reddish 
brown, becoming more rufous on the upper tail-coverts; primaries 
and tail dark brown, fringed with rufous ; chin whitish ; all the under . 
surface deep fawn-colour ; irides yellowish brown. 
‘Total length, 64 inches; bill, 12; wing, 3; tail, 3; tarsi, 1. 
Hab. Western Australia. 
MICROSCOPICAL SOCIETY. 
June 18, 1845.—Thomas Bell, Esq., F.R.S., President, in the Chair. 
A paper by George Shadbolt, jun., Esq., “‘ On a British species of 
Ivodes found upon Cattle,” was read. 
The insects forming the subject of the present paper were found 
on some cows belonging to a farmer residing at Chingford, Essex, 
on the borders of Epping Forest. They are known to the country 
people by the name of the ‘‘ Tick,” but they are aware that they 
differ from the insects of that name which infest sheep and goats. 
They are found upon cattle, attacking all parts indiscriminately, and 
causing much irritation and annoyance to them. ‘They have been 
found in the number of several hundreds on a single cow, and have 
also been known to attack even human subjects, but this is not com- 
mon, and although it is probable that they infest other animals, the 
author has seen them only on cows. ‘They do not appear to breed 
on the animals infested, but are produced in the forest into which 
the cattle are sent to graze, and which appear to become infested 
with them by their crawling up their legs while feeding. After 
having attached themselves by means of a very curious apparatus 
with which they are furnished, they gorge themselves with blood, and 
the abdomen increases in size from about the ;4,th of an inch until 
they become as large as a small bean; when tully gorged they fall 
off, and the author was not able to ascertain their further progress. 
The form of this insect is oval; it has eight legs, in which particular 
it differs from the Brazilian species described by Mr. Busk in a former 
paper read to the Society, these last having but six. These legs are 
attached to the anterior half of the trunk, and consist of seven joints, 
the tarsi being terminated by a species of webbed foot, capable of 
being folded together and furnished with two recurved claws. The 
oral apparatus by which it attaches itself is exceedingly interesting ; 
it consists of two palpi serving as a kind of sheath to the other parts 
when inactive, two jointed mandibles, and a barbed or hooked labium, 
Specimens of this and other species were afterwards exhibited. 
Also a paper by H. Deane, Esq., ‘‘ On the Existence of Fossil 
Xanthidia in the Chalk,” was read. 
After mentioning that the occurrence of Xanthidia in a fossil state 
had not hitherto been observed in any other situation than in the 
flint-nodules of the chalk, and consequently that great doubt existed 
whether these fossils were really independent animal existences or 
only parts of some other creature, Mr. Deane stated that there is a 
grayish kind of chalk having no flints, but containing quantities of 
