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 A HISTORY OF SUSSEX Silo pallipes, Fabr., at Fairlight and Guestling; and Cruncecia irrorata. Curt., at Fairlight and Binstead. The Leptoceridce are Bercea pullata. Curt., Hastings ; Leptocerus aterrimus, Steph., Guestling ; Mystacides nigra, Linn., Hastings and Bersted ; M. longicornis, Linn., Hastings ; Trianodes bicolor. Curt., Hastings district ; (Ecetis furva, Ramb., Winchelsea ; and (E. lacus- tris, Pict., Bersted. Of the Hydropsychidce we have Hydropsyche pelluci- dula. Curt., from GuestUng ; Diplectronafelix, McLach., from Fairlight ; Wormaldia occipitalis, Pict., from Fairlight ; Plectrocnemia conspersa. Curt., from Hastings ; Folycentropus flavo-maculatus, Pict., from Bodiam ; Holo- centropus dubius, Ramb., from the Hastings district ; H. picicornis, Steph., from Pett ; Tinodes assimilis, McLach., from Fairlight and Bognor ; and T. nsoceneri from Chichester. The list concludes with three Rhyacophilidce — Rhyacophila dorsalis,Q.wr..Sxom Fairlight ; Agapetus fuscipes. Curt., from Bognor ; and A. comatus, Pict., from Midhurst. The last family — the Hydroptilidce — are at present unrepresented in the county list. RESULT Sub-orders Sussex British Psocidia 24 out of about 44 Perlidia 3 Ephemeridia Odonata 26 Planipennia 26 Trichoptera 43 130 359 HYMENOPTERA PHYTOPHAGA TENTHREDINIDtE Sawjlies The sawflies are very little known to the general public, and even among entomologists there are not many who have paid much attention to them. Very few attract notice either in the larval or imago state, though some are at times very destructive. The larva of Hoplocampa testiidinea destroys our apples, devouring the interior and causing them to fall when about the size of walnuts. About fifty years ago the larva of Athalia spinarum was very destructive to young turnips, clearing whole fields in a very short time, but little has been heard of it of late years ; while Nematus ribesii, the very common gooseberry pest, devours the leaves, leaving the branches bare, and thus injures the fruit. Yet the Tenthredinids are very interesting on many accounts ; the saws with which they are furnished and which they use to provide a nidus for their eggs are interesting structures and of very varied forms. The sawflies also afford very curious examples of complete or partial parthenogenesis. In some species the males and females occur in almost equal numbers, in others the males are very rare compared with the females, 118