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 liave 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, tlie North- American aquatic Rliynchota. 



N. Uhleri 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 w^ith the above descriptions it may be 

 as well to remark that, contrary, perhaps, to the usage of 

 some entomologists, I have used the word " transverse " in 

 the sense of being wider than lovg : some rhynchotists, also, 

 appear to use the word '"''vertex'''' as the equivalent of the 

 wlioh 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 Noionectoi 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. 



Corixa ewynome, sp. n. Australia. 



australis, Fieb. Additional description. 



suhjacens, Walker. 



lacustns, Stephens. ( -n „i vi ai^c: „„ „^ 



• 7- c'li. 1 r Probably M;^o. names. 

 rivalis, btepheus. 1 •' 



Nepn minor, Walker. ) 



Corixa caledonica, nom. nov. for C. cognata, D. & S. (preoccupied). 



Kotoneda Montandoni^ sp. n. China. 



lactitans, sp. n. West Central Africa. 



Vhleri, sp. n. North America. 



VII. — New Cychstomatous Bryozoa found at Madeira. 

 By James Yate Johnson, Corr.M.Z.S. 



Tubuliporidge. 



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 



