180 [August, 



OPOGONA, Z. 



29G1. Opogona dimidiatella, Z. 



Opogona dimidiatella, Z., Bull. Soc. Imp. Nat. Mosc, XXVI, 507—8, 



PI. IV, 13— IG (1853) ' ; Stgr. and VVk., Cat. Lp. Eur., 335, No. 



2901 (1871) "-. 



Type,$. Mus. Wlsm. 



Hah.: Java (Teiif/strom) \ [Htecania " (?)]. 



This specie.s, described by Zeller in a paper, entitled, '' Drei 

 Javanische Nachtfalter," is included in Staudinger and Wocke's Cata- 

 log, with the' locality " Hyrc " — on what evidence is not apparent — 

 the identification is most improbable, and there seems no justification 

 whatever for its inclusion in the European Catalogue. Although we 

 have seen various other species from Malaysia, dimidiatella has not 

 been recognised among them, and the type is still unique. In the 

 Chi'istoph Collection there is a single specimen labelled dimidiatella, 

 taken at Wladiwostok, 31, VII, 1877, but, as might have been expected, 

 this is quite distinct from Zellcr's species. 



Merton Hall, Thetford : 

 June, 1900. 



BER.EA ARTICULARIS, Pict., AN ADDITION TO THE BRITISH 



TRICROPTERA; WITH FURTHER NOTES ON PLECTROCNEMIA 



BREVIS, McLach. 



BY THE EEV. A. E. EATON, M.A., F.E.S. 



Fancying that they appeared in the net to be slightly different 

 from the commoner species of BercBa {pullata and maurus, Curt.) of 

 this part of England, I secured some specimens of B. articularis on 

 June 28th, at a site on Haven Cliff frequented by Pericoma decipiens, 

 Etn. 



Both of these species appear to be extremely local in this neigh- 

 bourhood. P. hrevis (cf. ante p. 149) until now has been taken only 

 at Seaton Hole. At the foot of the lowest part of the Upper Green- 

 sand Cliff a spring trickles forth and forms a patch of marshy ground 

 overgrown thickly with Equisetum maximum and planted with osiers 

 that do not thrive, with a little Eupatorium cannahinum interspersed. 

 After sunset, when the Equisetum becomes beaded with moisture, the 

 Plcctrocnemia comes out for flight. A year or two ago P. hrevis used 

 to frequent sites where the Eupatorium grows beside the foot-path 

 leading to Seaton along the shore. 



