APHIDES IN AMBER. 165 



they date just after the era of the great salt formations 

 of Grallicia and the North of Austria. A synopsis of 

 these beds, as given by Berendt, is as follows : 



Fruit-bearing Shales. Alluvium. 



Younger diluvium. Northern gravel (Nordische Geschiebe). 



Younger sandstones. Beetle-clay in Cerithienkalk. 

 Plastic clay. Brown coal (lignite) with Amber. 



Gallician salt formation. 

 Limestone. 



I believe that a more detailed examination of the 

 specimens themselves, with greater microscopic aid 

 than has been hitherto used, will modify some of the 

 genera ascribed by Berendt to these insects.* 



2.— DIAGNOSIS OF APHIDES IN AMBER, AND DESCRIP- 

 TION OF THE FIGURES IN PLATE CXXXI. 



Aphis akaneifoemis, Gerrnar and Berendt. Plate 

 CXXXI, fig. 4, of this Monograph. 



Berendt' s description, very shortly giveu, is as 

 follows : 



Antennse pilose and nearly the length of the body. 

 7-jointed. Legs not hairy. Rostrum not visible in 

 this specimen. 



From the characteristic cornicles aud general appear- 

 ance of the insect, I (the present author) would refer it 

 to the genus Rhopalosiphum rather than to Aphis. 



In Berendt's description,* to which the reader is 

 referred, the insect is thought to have some affinity 

 with Aphis pomi of De Geer (A. mali of Schr.), but in 



* E. J. Germar u. G. C. Berendt, ' Die im Bernstein befindlichen 

 Hemipteren u Orthopteren der Vorwelt.' Berlin, 1856. ' Organische 

 Reste im Bernstein,' Band ii, Tab. i, figs. 4—8, and Tab. ii, fig. 1. 

 1 Aphidina,' pp. 4, 5 6, and 7; 



