60 Mr. J. Y. Johnson on new 
The female is larger and apparently more robust than the 
male, as is the case with some other species of Notonecta. 
Massachusetts and Florida: coll. Uhler. Massachusetts: 
British Museum. Massachusetts: Montandon’s coll. 
I have great pleasure in dedicating this handsome and 
remarkable species to the illustrious American Rhynchotist, 
to whose labours for the past forty years we are indebted in 
such large measure for our knowledge of, amongst other 
things, the North-American aquatic Rhynchota. 
N. Uhilert is at once distinguished by the very peculiar 
form of the head and eyes, as above described ; it is doubtless 
not uncommon over a large area of the United States. 
N.B.—In connexion with the above descriptions it may be 
as well to remark that, contrary, perhaps, to the usage of 
some entomologists, | have used the word ‘ transverse” in 
the sense of being wider than long: some rhynchotists, also, 
appear to use the word “ vertew’’ as the equivalent of the 
whole dorsal surface of the head (excluding the eyes) ; I have 
restricted the term to the apparent (as seen from above) apical 
margin of the head; the head, moreover, will be found to be 
narrowest in most Notonecte not at the base, but a trifle above 
it, between the postero-interior ocular angles in fact. 
Summary. 
Diaprepocoris, gen, nov. 
D. barycephala, sp.n. Australia, 
Coriza eurynome, sp.u. Australia. 
australis, Fieb. Additional description. 
subjacens, Walixer. 
lacustris, Stephens. Probably MSS. names. 
rivals, Stephens. 
Nepa minor, Walker. 
Corixa caledonica, nom. nov. for C. cognata, D. & 8. (preoccupied). 
Notonecta Montandont, sp. n. China. 
lactitans, sp.n. West Central Africa. 
— Uhleri, sp.n. North America. 
VII.—New Cyclostomatous Bryozoa found at Madeira. 
By JAMES YATE JOHNSON, Corr.M.Z.S. 
Tubuliporide. 
Alecto simplex, J. Y. Johnson. 
A very slender adnate thread, from the upperside of which 
rise the erect elongate cells in a single series. The adnate 
