Seance du 2.9 Janvier 1913. 17 



puslulcs or swellings on the bark of the trunk and 

 ])ranchcs of the cSunl» tree (Acacia arabica). The mites 

 dwell within the shelter of the pustules. In colour 

 they are bright scarlet, adults, ova and young miles. 



Five species of gall-forming miles or Eriophyidae 

 occur in Egypt. One on Ihe foliage of the «Sunt)^ 

 (Acacia arabica); one on the foliage of the Sycamore 

 fig tree; another species on the leaves of a flowering 

 plant (Vile.v agmis caslns) a fourth on the twigs of 

 the Tamarisk tree, and the fifth on the foliage of 

 vines giving rise to a disease known as cErinosew. 



An interesting mile occurs as a parasite on the 

 gamoose or Egyptian BufTalo forming scabby patches 

 on the backs of the animals. This species has not 

 yet been identified. 



Hijpopus spinilavsus (Herm.) a more or less cosmo- 

 politan mite has been found in numbers on imported 

 hyacinth bulbs and also on onions. With regard to 

 the origin of the latter I am not certain ; they may 

 have been imported but are believed to have been 

 grown in Egypt. 



A beneficial mile of wide distribution which has 

 come under my notice is Pedicnloidcs venfricosiis Newp. 

 Enormous numbers of this mile were bred from a 

 sample of cowpeas infested with liriichns cliinensis the 

 cowpea beetle. The mites had fed on and destroyed 

 the larvae and pupae of the latter in large numbers. 



I have also found this same mite feeding on the 

 pupa of a Buprestid beetle in the branch of a fig-tree 

 at Zagazig. 



In the laboratory at one time or another it has 

 been observed on the larvae of Earias insulana the 



