258 



iScrrembeT, 



the Other two. Marginal sttae ample, slender. moderatelT long. Anal 

 deft about one-fourth tie total lengtli of the bcdv. Valves of aral opercultun 

 together approximatelv quadrate : inner margin longest : base and onter margm 

 of eqtial length- Dermal cells small subcircnlai: more noticeable on the 

 marginal area where tber appear as darker spots, being filled with granolar 



F-r. 1.— : 



lale, dorsal -vie-K-, X 5 : (6) antenna; 



X 220 : i<f ] lower stagmatic spin^, 



X 220 1 (e) iKKtesior kg. X 130. 



matter . X umeroos tiiick-rnmned, tubukr pores, -with trilocnlar or quadrUoenlar 

 apertures, are dittributed orer the dorsimu 



Length 4"5-6 mm. : breadth 4-6 mm. 



On the steins and blanches of Querent glandulifera (plants recently 

 imported from Japan). St. Alljans. Herts : 5.V.1921. 



A Terr distinct species, well characterized By its 9- jointed antennae 

 and lichenoid colonrino^. 



Ceroplaitet floridenii4 ja^onieui, rar. nov. (Fig. 2 a, I. e.) 



External characters as in the type, riz. : — waxy test creamy-white, sh'gbtly 

 tinned with pink on the diseal area ; divided into distinct plaques or which the 

 discal series is often asymmetrical id), one side being occupied by a more 

 prominent cushion of ■wax surmounted by a small oval boas. 



The present form differs from the type in the further extension of the series 

 of marginal spines on each side of the stigmatic areas. In typical fioridensis 

 these spines cease at a short distance above and below each stigmaric cleft, 

 being replaced — in the intervals — by simple curved setae (c) ; while., in var. 



