On some new species of Exotic Homopterous Insects. 207 



inner row of petals ; not very far from the Anonacece, because of 

 their 3-seried petals, with valvate aestivation and extrorse stamens ; 

 and near the Berberidacece, on account of their corolla in two 

 series, of the valve-like dehiscence of their anthers, which are 

 also extrorse, their stipitate ovarium, entire style and stigma, and 

 the structure of the seed and embryo. 



In this same projected division, it appears to me, some other 

 groups will before long find their place, and will thus mark a 

 better gradation, and form a more complete link between the 

 PolycarpictB of Endlicher and those syncarpous orders with simple 

 series of floral envelopes, which now exhibit too wide a space of 

 transition between them. These will probably form a distinct 

 class {Coniosperma from the development of the ovules on a cen- 

 tral and more or less columnar placenta) intermediate between 

 the Polycarpicce and Rhceades, and into it will enter more natu- 

 rally the Berberidacea, which in truth are never polycarpic, for 

 they have generally a solitary unilocular ovarium, with the pla- 

 centae either central or by partial suppression, adhering parietally 

 to the sides of the cell. We may consider this alliance as pre- 

 senting a development of one or more carpellary leaves, with the 

 sterile margins often somewhat partially introflexed, so as to 

 form spurious dissepiments, and the ovuliferous placentfe ema- 

 nating from their basal or hypothetically petiolar supports, and 

 united in a basal or columnar trophosperm. In this respect, it 

 will be seen to be an intermediate stage of development between 

 the Polycarpica and the Rhceades, in which last class the mar- 

 gins of the carpellary leaves are placentiferous, and there simply 

 united together, and being elevated on their petiolar supports, 

 thus form a distinct gynophorus : they offer some analogy with 

 the Gynobasic classes, which at the same time exhibit a gyno- 

 phorous origin, with the axile union of the introflexed placentary 

 margins of the carpels. In the class I have here suggested, the 

 OlacacecB, Styracea, Ebenacea, MyrsinacecB, &c. may probably 

 find a better position than the stations assigned to them in most 

 of the modern systems of arrangement, and I shall take an early 

 opportunity of demonstrating the facts, and offering the reasons, 

 upon which such an opinion is grounded, as I propose soon to 

 publish the description of several curious genera belonging to 

 the Glacaceee, Styracece, &c. 



XX. — Descriptions of some new species of Exotic Homopterotis 

 Insects. By J. 0. Westwood, F.L.S. &c. 



The following descriptions were forwarded some months since 

 by me to Dr. Schaum for his memoir on the family Fulgoridce 

 in Ersch and Gruber's ' Encyclopadie.' As however that memoir 



