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 INSECTS HELOPHORINA (continued) Octhebius pygmaeus, F. mon, in the reservoir rufimarginatus, Steph. a ditch Hydrasna testacea, Curt. Hastoe, once found in numbers in dead leaves at the bottom of an empty pond in Brown's Lane riparia, Kug. Tring nigrita, Germ. Puttenham and Oil- stone SPH^ERIDIINA Cyclonotum orbiculare, F. Sphaeridium scarabseoides, F. Tring bipustulatum, F. Cercyon haemorrhous, Gyll. Wigginton, in refuse on a pond bank haemorrhoidalis, Herbst. Tring obsoletus, Gyll. Tring ; Hertford (Stephens) aquaticus, Muls. Wihtone, scarce, under refuse by the reservoir flavipes, F. Tring ; New Barnet (New- bery) lateralis, Marsh. melanocephalus, L. unipunctatus, L. quisquilius, L. Miswell Tring ; New Barnet Tring pygmaeus, 111. analis, Payk. (Newbery) lugubris, Payk. the reservoir minutus, Muls. Wihtone Megasternum boletophagum, Marsh. Tring ; New Barnet (Newbery) Cryptopleurum atomarium, F. Tring STAPHYLINIDJE AUEOCHARINA Aleochara fuscipes, F. in-- - lata, Grav. } *"** tristis, Grav. Tring, rare, one speci- men beaten out of a hedge bipunctata, Ol. Tring cuniculorum, Kr. Near Bovingdon, found just inside rabbit burrows, a very usual haunt of the insect lanuginosa, Grav. Tring, a very com- mon species lygaea, Kr. Near Bovingdon, rare, one specimen only under a dead bird succicola, Thorns. Tring mcerens, Gyll. New Barnet (New- bery) ; caught on a window nitida, Grav. Tring, the commonest species of the genus ALEOCHARINA (continued) Wihtone, com- Aleochara morion, Grav. Tring Microglossa suturalis, Sahl. Tring, usu- Puttenham, in ally considered a common species, but I have only found it rarely pulla, Gyll. Bovingdon, taken on flow- ers, in May Oxypoda spectabilis, Mark. Tring, rare as a rule, but I once found six to- gether beneath a dead rabbit lividipennis, Mann. ) opaca, Grav. I Tring alternans, Grav. ) lentula, Er. Tring, rather rare, under dead reeds, at the reservoir near Wil- stone umbrata, Grav. Tring nigrina, Wat. Tring, very frequently to be found in garden refuse longiuscula, Er. > _. . haemorrhoa, Mann. / * amoena, Fairm. Tring, two examples only in decaying leaves in a hilly wood annularis, Sahib. Tring, rather com- mon, in and about woods brachyptera, Steph. Tring, most often found in the spring Ischnoglossa prolixa, Grav. Aldbury Com- mon, under oak bark Ocyusa incrassata, Kr. Tring, scarce, in moss on old stumps. There are very few localities for this species further south, but it is generally distributed in the midland districts and the north maura, Er. picina, Aubd. Phlceopora reptans, Grav. Tring Ocalea castanea, Er. badia, Er. Ilyobates nigricollis, Payk. Wihtone, scarce, four examples taken in refuse by the reservoir, April, 1900 glabriventris, Rye. Tring, very rare, two specimens taken by sweeping in a wood just on the border of the county, June, 1897 ' This species was found by Dr. Power in May and June, 1863, in the runs of Formica fuliginosa, and has not since been captured ; it did not occur in the nest of the ants' (Fowler, British Coleoptera, vol. ii. p. 47). Dr. Power took his speci- mens at Mickleham in Surrey Calodera riparia, Er. Wihtone, scarce, at the reservoir aethiops, Grav. Wihtone and Little Tring, rather common Wihtone, in moss by 89