INSECTS Of the Bembian twenty-two species occur, including B. qmnquestria- tum, B. ceneum^ B. articulatum and B. affine. The late Mr. Blatch's belief that he took B. adustum within the Warwickshire borders is probably correct, as he found this insect in the utmost profusion on the banks of the river Severn in a similar locality to which he refers his Warwickshire record. The beautiful Lebia chlorocephala has lately been added to our list ; it has however been previously taken a few miles beyond the county boundary. Seven species of Dromius occur, the rarest of which is D. quadrisignatus. The small but very active Bkchrus maurus was found by Mr. Blatch at Leamington, the usual limits of this beetle being in the southern counties and generally on or near the sea-coast. All the species of Metabletus occur. The Hydradephaga are represented by sixty-three species. Brychius e/evatus occurs plentifully between Solihull and the adjacent village of Knowle, and of the genus Haliplus nine species have been taken within our borders, some very plentifully ; but the species H. confinis., H. fu/vus, H. cinereus and H. striatus are rare. Pelobius tardus has only occurred in two localities, but could in all probability be obtained in several places by systematic working. The Hydropori are represented by sixteen species, of which H. umbrosus and H. angustatus are very rare, most of the other species being abundant. Of the species of Agabus some are extremely plentiful, the rarer ones being A. gutfafus, A. affinis, A, unguicularis, A. didymus and A. sturmii. Amongst the other genera the following are the rarer species : Copelatus agi/is, Rbantus exo/efus, Dytiscus punctulatus and Gyrinus opacus. The Hydropbilidce are represented in the county by fifty-four species, a large proportion of which have been taken in the vicinity of Knowle, although the scarcity of recorded localities is probably accounted for by the fact that very little work amongst the water beetles has been done outside this district. The following are the more important species : Hydrobius picicrus, Pbilbydrus nigricornis, Holochares lividus, Laccobius alu- faceus, L. minutes, L. bipunctatus, Limnebius picinus, Helopborus dorsalis, Ocbtbebius poiveri, O. rufomarginafus, Hydrcena augustata (usually con- sidered a more northerly insect) and H. pulchella. The Brachelytra, consisting of 777 British species, are represented in Warwickshire by 480. A large proportion of the insects in this sec- tion are small and extremely difficult to identify, due to the great simi- larity existing between them, and it is owing to the large amount of work which the late Mr. Blatch bestowed upon this naturally isolated group that we can include so many species in our list. Many insects of this group are myrmecophilous, and good oppor- tunities are afforded of studying the ants' nests in the well wooded country in the vicinity of Knowle, which district forms part of the ancient Forest of Arden. The particulars of each species have been 79
Page:VCH Warwickshire 1.djvu/117
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