36 [February, 



TOWARDS THE BETTER KNOWLEDGE OF THE GENUS LKCANIUM. 

 BY DR. KAKEL 8ULC. 



The greatest number of our Palsearctic, Bohemian, and also 

 British species (not introduced in hothouses) of the genus Lecanium 

 (sensu Signoret) are grouped now in the new generic division 

 Eulecanium, of Cockerell (1901), which is also used in the Catalogue 

 of the Coccidce of the world by Mr. E Fernald (1900). 



The following may be specially mentioned: L. persicce, Geoff., 

 coryli, L., caprece, L., douglasi, Sulc, prunastri, Fonsc, bituberculatum, 

 T. T. (sensu Newstead, British Coccidce, 1903). 



I will speak only of the truly Bohemian species, known to me 

 at the present time, treating the males alone ; the females being well 

 described and figured by Newstead. 



The results of my many years studies are, that the above-men- 

 tioned species could not be contained in a single genus having salient 

 generic differential characters, and I propose therefore the following 

 distribution : — 



Parthenolecanium, n. gn. 



There is no male ; female parthenogenetic. 



Type, coryli, L., persicce, Geoff., both closely allied, and perhaps 

 one and the same species. 



Eulecanium, Ckll., Defin. emend. 



The male with six pairs of eyes, wings present, with pockets for 

 hooks of the halteres ; halteres present. Two pairs of waxy abdo- 

 minal filaments. 



Type, caprece, L. (Syn. tilice, Sign. ; pyri, Goethe), douglasi, Sulc, 

 ciliatum, Newstead, alni, Mod. ; the last three names being perhaps 

 synonymic. 



Sl'IEiEROLKCANlUM, n. gil. 



The mule with three pairs of eyes, wings present, but without 

 pockets ; halteres wanting. Two pairs of waxy abdominal filaments. 

 Type, prunastri, Fonsc. 



Paljeolecanium, n. gn. 



The male with three pairs of eyes, wings present, with pockets 

 for hooks of halteres: halteres present. Two pairs of waxy abdominal 

 filaments. 



Type, bituberculatum, T. T. 



A more extended illustrated treatise on the subject will appear 

 in the already prepared continuation of my Studies on Coccidce. 



Ostrava-Micluiikovice, Austria : 

 December 1st, 1907. 



