THE AFGHAN DELIMITATION COMMISSION. 



141 



EXPLANATION OF PLATE XIV. 



Fig. 1. Spyrathus politus. 



2. Adesmia sodalis, $ . 

 3- „ ?. 



4. Sympiezocemis kessleri. 



5. Trigonoscelis longipes. 



6. Cantharis lata. 



7. „ glabricollis. 



8. Ocnera gracilis. 



9. Blaps tridentata. 

 10. Prosodes diversa, $ . 



Fig. 1 1 . Prosodes diversa, $ . 



12. Blaps felix. 



13. Diesia costifera. 

 H. Apalus plagiaius. 



15. Cantharis conspicua. 



16. Agapanthia nigriventris. 



17. Stizus terminus. 



18. Ammophila mandibulata. 



19. Crocisa bidentatu. 



20. Stizus tages. 



GALL-INSECTS. 



By G. B. Buckton, F.R.S., F.L.S. 



With the collections brought home by Dr. Aitchison from Afghanistan were some galls 

 which have been handed over to me for examination. They were gathered in 1885, on 

 Pistacia vera, and were of various sizes, forms, and colours, as bright orange, purplish 

 red, or green. When cut across they showed single, smooth, shining cavities, each of 

 which had an exit at its base, near the peduncle, from which the insects, when mature, 

 would have made their escape. Within the hard woody walls a quantity of excrementi- 

 tious matter was found, mixed with a flocculent material, and numerous whitish bodies, 

 numbering perhaps from thirty to fifty. These contents formed a mass at the base of 

 the gall. 



A. Larval form of Pemphigus coccus, parthenogcnic female (enlarged). 13. Natural appearance of Gall. 



C. The same, opened. 



Under a lens the grains had the appearance of grape-sugar. The substance was 

 soaked for a short time in water, and then treated with weak alcoholic potash, which 

 slowly dissolved the fatty matter ; and then the bodies of the insects separated out suffi- 

 ciently distinct for drawing. 



SECOND SERIES. — ZOOLOGY, VOL. V. 22 



