160 The Insects of Cambridgeshire 



Coming to the Chrysomelidcv the rare Donacia <i<'nf<it<i 

 is sometimes plentiful on water plants in Wickcn 1-Vn in 

 August, and DOIKIC'HI xjHtn/dm't is also to be found in the 

 same locality. The only British specimen of Cryptocephalua 

 primdrina was taken by Dr Power many years ago on the 

 Gogmagog Hills. The beautiful Chrysoun-ld ynunini*, chiefly 

 a fen species, occurs in plenty on water-mint in Wicken Fen, 

 and is recorded from Soham, Ely and Burwell Fens. M< Idtoma 

 populi is plentiful on young poplars in Wicken Fen, occurring 

 in August in all its stages. The extremely rare Adinio/iiti 

 celandica was taken in numbers in* Wicken Fen by Mr Blatrh 

 in August 1878. The same fen is one of the few recorded 

 localities for the rare Longitarsus waterhousei , and Phyllutn'ia 

 sintmta is to be found there, and at Quy Fen. 



Passing now to the Heteromera the coast species Cteniopus 

 sulphureus is common on flowers in Wicken Fen ; Cambridge- 

 shire is one of the few counties where the " Blister Beetle," 

 Lytta vesicatoria, occurs; it has been abundant during the 

 last few years at Newmarket, on privet hedges and ash. In 

 1901 the writer ran it down in its old locality near the Gog- 

 magog Hills on ash trees. 



Finally we come to the Rkynckophora, in which Lints 

 paraplecticus, a curious weevil, with its elytra terminating 

 in two long points, is one of the most interesting beetles of 

 the Fens ; it is said to have disappeared before drainage, but 

 this is not the case so fa,r as Wicken Fen is concerned, where 

 it occurs in abundance on Si um latifolium, the larvae living 

 in the stems of this plant. The perfect insect is covered with 

 a yellow pollen-like dust, which it has the power to renew 

 during life. The pretty little Nanophyes lythri is abundant 

 on Lythrum in Wicken Fen, and the local and rare Dorytnmus 

 salicinus may be taken in plenty by beating the sallow bushes 

 in Wicken Fen. Hylesinus crcndtus and //. <>l> -ipi'nld. bnth 

 occurring in ash, are to be found at Chippenham ; the latter 

 bores into the small twigs at the end of the 1. ram -lies, from 

 which it may be beaten. 



