Séance du iì Février Ì9Ì3 45 



A Key to the fourtti Stage Anopheles larvae 

 of Palestine (I)iit.) 



by P. A. Buxton 

 Medical Entomologist, Palestine Governement 



This key has been in use in Palestine for a year 

 and has proved to be workable and accurate. It is 

 based on Edward's Palaearctic key {Dull. Entoni. 

 Research XII, pp. 263-35i) but contains several alter- 

 ations and additions. I am indebted to my assistant 

 Mr. O. Theodor for several of the drawings and to 

 the Editor of the Bulletin Entomological Research for 

 lending the blocks of figures 2, 4, and 5 which have 

 recently appeared in that periodical. 



1. Shaft of antenna with branched hair (Fig. i)... 2 

 Shaft of antenna ^^ith simple hair (Fig. 2) 6 



2. Outer anterior clypeal hair dendriform (Fig. 3).. 3 

 Outer anterior clypeal hair simple or nearly so.. 5 



o. 



Innermost shoulder-hair branched from base . . 



inauritiaiius, Grp. 

 Innermost shoulder-hair branched only at tip 

 or unbranched A 



Antenna! branched hair, half length of antenna 



and with about ten branches (Fig. i a.) 



hyrcaniis, Pallas 



