SCHIZONEUrvA COEXI. 107 



ad curandum vulneribus sub nomine olei Sti. Joannis." 

 It is not unlikely that tlie astringent cliaracter, coupled 

 with the viscosity of this liquid, may have some healing 

 effects, and beneficially exclude the air from open 

 wounds. 



M. Lichtenstein has hazarded the supposition that 

 Sch. veimsta of Passerini is the underground form of 

 Sch. lanuginosa. Although the migration of Phylloxera 

 vastatrix from the root to the branches of the vine is 

 fully proved, and I have shown that both aerial and 

 subterranean forms exist in Schizoneura fodiens, a too 

 hasty generalisation should be avoided. A close and 

 pains-taking observation will alone justify the fusion 

 into one of these two apparently well-marked 

 species. 



ScHizoNEUKA coRNi, Fah., Schr., JIaus., Kalt., Pass., 

 Licht. PL CX, figs. 1—4. 



Scliizoneura vagans, Koch. 

 An^cia corni, Koch. 



Oval, flat, dull black. Abdomen brownish ; legs paler. 

 The first brood appears in England about August upon 

 the white cymes of the dogwood Cornus sanguinea. In 

 Germany they appear in greater plenty ; and late in 

 August and September, when they assume wings, Kal- 

 tenbach says that the air is so full of them they fly into 

 the eyes, nose, and mouth, to the great annoyance of 

 the traveller. At other times they swarm like gnats 

 in the slanting rays of the sun. 



Winged vivijmro^is female. 



lucli. Millimetres. 



Expanse of wings 0'250 6"35. 



Size of body O'OSO X 0*030 2-02 X 0-76. 



Length of antennee 0*040 I'Ol. 

 VOL. III. 8 



