THE AFGHAN DELIMITATTON COMMISSION. 



141 



EXPLANATION OF PLATE XIV. 



^ig. 1. Spyrathus poUtus. 



2. Adesmia sodalis, (^ . 



3. „ » ?. 



4. Sympiesocemis kessleri. 



5. Triyonoscelis longipes. 

 G. Cantharis heta. 



7. „ glahricoUifi. 



8. Genera gracilis. 



9. Blaps tridentata. 



10. Prosodes diversa, g . 



Fig. 1 1 . Prosodes diversa, $ . 



12. Blaps felix. 



13. Diesia cosiifcra. 



14. Apalus plagiaiiis. 



15. Cantharis conspicua. 



16. Agapauthia nigrivcntris. 



17. Siizus terminus. 



18. Ammophila mandihulatn, 



19. Crocisa bidentata. 



20. Stizus tagcs. 



GALL-INSECTS. 



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



^''iTH the collections brought home by Dr. Aitchison from Afghanistan were some galls 

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

 Pistaeia 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 exerementi- 

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

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

 the gall. 



A. Larval form of Pemphiijns coccus, iiarthenogeiiic female (enlarged). B. Natural appearance of (fall. 



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 sufli- 

 ciently distinct for drawing. 



SECOND SERIES. — ZOOLOGY, VOL. V. 



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