452 Mr. J. Miers on the genus Cathedra. 



Wales, and being provided^ like other species of the genus, with 

 a small climbing apparatus situated below the tarsal claws, it 

 runs with great rapidity on the dry perpendicular surfaces of 

 highly polished bodies. Though the sexes resemble each other 

 in colour before they arrive at maturity, yet in the adult state 

 they diflfer remarkably in that particular. In June the female 

 constructs a lenticular cocoon of white silk of a fine but compact 

 texture, measuring ^th of an inch in diameter, in which she 

 deposits about 72 spherical eggs of a yellowish white colour, 

 not agglutinated together. This cocoon is inclosed in a cell of 

 dull white silk of a loose texture, usually attached to a dead leaf, 

 the edges of which are drawn towards each other by silken lines 

 connecting them with the cell. 



43. Philodromus cespiticolis. 



Philodromus cespiticolis, Walck. Hist. Nat. des Insect. Apt. t. i. p. 

 555. 



cespiticolens, Blackw. Linn. Trans, vol. xix. p. 123. 



fusco-marginatus, Suud. Vet. Acad. Handl. 1832, p. 224. 



Philodromtts cespiticolis is found among heath, gorse and juni- 

 per bushes in the vicinity of woods in Lancashire, Berwickshire, 

 and the west of Denbighshire. In July the female spins a cell of 

 compact white silk among leaves growing near the extremities of 

 the stems of shrubs, curving them about it and retaining them 

 in that position by means of silken lines. This cell she occupies, 

 and usually constructs in it two lenticular cocoons of white silk 

 of a delicate texture, depositing in each from 40 to 100 spherical 

 eggs of a pale yellow colour. The cocoons frequently differ con- 

 siderably in size, the larger one measuring about |th of an inch 

 in diameter. 



XLIV. — Contributions to the Botany of South America. 

 By John Miers, Esq., F.R.S., F.L.S. 



Cathedra. 



This is a very singular genus, which I proposed a few years 

 ago, for an arborescent shrub that I found near Rio de Janeiro, 

 having much the appearance of a Myrsine, with which genus its 

 flower agrees, in having a small cupshaped calyx, as many sta- 

 mens as petals placed opposite to them, a short style and a cla- 

 vate stigma, a depressed ovarium, which is unilocular, with seeds 

 fixed to a central placenta. It differs however from that genus, 

 in its almost entire calyx, in its petals and stamens being six in 

 number, inserted upon the margin of a fleshy hemispherical or 



