1905.] 



263 



A Study of the Aquatic Coleopteea and theik Surroundings in the 

 Norfolk Bhoads District : by Frank Balfour Browne, M.A., F.R.S.E., 

 F.Z.S. (Reprinted from the Transactions of the Norfolk and Norwich Naturalists' 

 Society, vol. viii). 



We have much jDleasure in callint; attention to this important paper, which is a 

 valuable contribution to the bionomics of an interesting and, at present, perhaps 

 rather neglected section of our native Cnlenptera. The district investigated has 

 long been known to be more than usually rich in water-beetles, and the thorough and 

 exhaustive manner in which Mr. Balfour Browne has done his work is evident from 

 the number of " collections "—no fewer than 1079 in ten months -from which his 

 data and observations have been drawn. 7fi species of Hy^radephaga (not including 

 the Gyrinidce), and 41 species of the more aquatic forms of Palpicornia, comprising 

 all but a very few of those known to occur in Norfolk, have been observed ; and the 

 elaborate tables on pp. 70 and 71 show at a glance the distribution and relative 

 abundance of each species in the different sub-districts. A large proportion of our 

 rarer water-beetles are included in this list, and the finding again, after so many 

 years, of Hydroporus scalesianus in the county whence the original specimens 

 described by Stephens carae, is of exceptional interest, as is also the re-discovery of 

 the long-lost fen species, Rhantus adspersus and Graphoderes cinereus. The notes 

 on distribution and dispersal, and the table of associated species, are of very high 

 value, and the paper as a whole is well worthy of careful study by every one 

 interested in our Coleopterous fauna. 



Report of Work of the Experiment Station of the Hawaiian Sugar 

 Planters' Association : Division of Entomology. Bulletin I, Pt. I, pp. 90-111, 

 Pis. 1 — V, Leaf Hoppers and their Natural Enemies (Pt. iii, Shfopidce). 

 By R. C. L. Perkins. 



The first of these interesting Bulletins on the Enemies of the Leaf Hoppers 

 was noticed in the August Number of this Magazine, and dealt with the Dryinidce 

 a family of parasitic Hymenoptera. This 3rd Part deals with the Stylopidoo, a 

 parasitic family of the Coleoptera. In this country Stylopidce are rare, and chiefly 

 represented by the genus Stylopa which attacks Aculeate Hymenoptera ; the other 

 . known genera, Elenchus, parasitic on " Leaf Hoppers," and Halictophagits, of 

 doubtful habits, being of extreme rarity. In America, Elenchus and Halictophagus 

 appear to be more or less abundant and constant parasites on Leaf Hoppers, and it 

 is suggested to employ them as a means of checking the spread of the " hoppers." 

 Mr. Perkins observes that " lioppers " which have nourished a ^ parasite invariably 

 die after the emergence of tlie Stylopid, partly, he thinks, because the hole left in 

 the integument lets in the air, and partly because round the orifice a fungoid 

 growth forms ; this fungus has also been noticed round the protruded head of 

 the ? , and is invariably fatal. So that to effect a satisfactory check on the 

 Hoppers, he thinks the fungus should be introduced as well as the Stylopid. In 

 his remarks on the genus Halictophagus, Mr. Perkins inclines to the belief that this 

 genus is a Jassid parasite and not a Hymenopterous one, and as he says he has 

 not the literature with him to deal with this point, I quote the account of the 

 original capture of the S by J. C. Dale, as quoted by Curtis in his British 

 Entomology from Mr. Dale's letter : — 



Y 2 



