( Ixxix ) 



jlavus and L. alienus taken at Porlock. Only these two 

 species were affected and only in a few nests. Several $ $ 

 contained two of the worms apiece. The wings and ovaries 

 of the imagines were very small, but otherwise normal $ $ 

 were developed. It is supposed that the worm enters the 

 larva, but its subsequent history is unknown. The exhibitor 

 first found them in the same two species of ant in Oxford- 

 shire in 1899 and 1900. Prof. W. M. Wheeler found similar 

 worms in £ £ of the American species Pheidole commutata, 

 where the § assumed a quasi-female form, with ocelli. 



Winged Females op Forda formicaria and F. viridana. 

 — Mr. Crawley also exhibited the alate $ $, hitherto un- 

 known, of the common ant aphids, Forda formicaria, Heyden, 

 and F. viridana, Buckton, taken at Porlock w T ith Lasius 

 alieno-niger. 



Mr. Donisthorpe commented on the rarity of both exhibits. 



Japanese Female Psychid and case. — Dr. Cockayne 

 exhibited a $ Psychid bred July 1916 from a larva found on 

 a Japanese dwarf cedar at Hammersmith, together with the 

 larval case. 



Dr. Chapman observed that the case was near that of 

 Acanthopsyche atra. 



Melanic and other Aberrations of British Geometers. 

 — Mr. L. W. Newman exhibited true melanic (unicolorous 

 black) specimens of Eupithecia lariciata from Warwickshire; 

 melanic specimens of Boarmia consonaria from Kent; dark 

 type, intermediate and melanic specimens of B. consortaria 

 from Warwickshire; also on behalf of Mr. Gr. B. Oliver two 

 curious aberrations of the latter species, a $ almost entirely 

 cream-coloured, and a <$ with both right wings heavily and 

 the left hind-wing slightly marked with yellow. 



Pupal cell of Dytiscus marginalis. — Mr. H. Main 

 exhibited a pupal cell in situ of the beetle Dytiscus marginalis, 

 together with a spectroscopic photograph of the pupa in its 

 cell, showing how it rested on its extremities, the rest of the 

 body being unsupported. 



Pare British Coleoptera. — Mr. Bedwell exhibited on 

 behalf of Mr. C. J. C Pool, who w r as present as a visitor, an 

 exceptionally large $ of Emus hirtus taken near Eochester 



