Two new species of tree-hoppers' genus Gargara Amyot and Serville attacking medicinal and commercial plants in northern Punjab and N.W.F.P. (Homoptera: Aauchenorrhyncha [Auchenorrhyncha]: Membraacidae [Membracidae]: Centrotinae) with their cladistic relationship. Proceedings of Pakistan Congress of Zoology, 16 1996: 197-205. 201 [Zoological Record Volume 135]