﻿XXIX 



of larvae and adults, and their classification being detailed. Two 

 new genera and a subgenus (noin. pracocc.) are described, and 

 eight new species. 



Part IV deals with the Pipiinciilidac : their habits, the form 

 of the larvae and puparia, and the classification of the numerous 

 s])ecies. Thirty-two new species are described ; the full descrip- 

 tion of one species, however, is omitted and will be found in Pt. 

 X. All belong to the genus Pipimailiis. and half the whole niuu- 

 ])er of species were bred. 



In Part \ . some predaceous enemies of leaf-hoppers are con- 

 sidered. The complete life-history of the earwig Cliclisochcs 

 nioriiK is given, and a detailed account of the lacewing-fly, 

 Chrysopa uiicrophya, its eggs, larvae and pupa case. Two re- 

 markable leaf-hopper-eating Syrphidae are described as new 

 species of the genus Bacclia. 



r^art \l gives an account of the Mymaridae. their habits (the 

 life-history of Paraiiagnis oplahilis being detailed) and their 

 classification. In addition, some egg-parasites of the Procto- 

 tru])oid family Platygasteridae are dealt with. Parthenogenesis 

 is shown to be usual in some Mymarids. Twelve new species 

 and two new genera (one in each of the two families) are de- 

 scribed, all Ijeing bred. 



In Part \'II a variety of predaceous enemies of leaf-ho])pers 

 is considered, the life-history and habits of the Locustid Xiplii- 

 (lliiiii Tcvipciinc, being very fully given, as well as the variation 

 in length of the tegmina. The life-histories anrl habits of the 

 C'occinellidae, CaUiiicda fcsfitcliiiaria, CocciiicHa rcpaiuhi. 1 'crania 

 frcuata and J', sfrigiila (under the name T. lincola) are detailed: 

 also those of the Hemiptera Zcliis pcrcgriiiiis. Rcdiivlohis black- 

 hiinii. Triphlcps pcrscqiieus and PhysoplciircUa niitndiilus, wholly 

 or in ])art. Xipliidiuin varipcnnc is described as a new species. 



Part \'1I1 deals with Chalcids of the families Encyrtidac, 

 luilophidae and Trichogrammidae, and contains remarks on 

 habits, classification and parthenogenesis. Thirteen new- genera 

 and nineteen new species are described, all bred, some being 

 direct, others secondary parasites. 



• Part IX is devoted to leaf-hoppers themselves; their habits, 

 and what is known of their life-histories is referred to or de- 

 scribed. The life-history of the sugar-cane leaf-hopper is given 

 in detail, and the various stages are described. The varying 

 condition of the flight-organs of leaf-hoppers is discussed at 

 length. Their systematic position and classification is very fully 

 dealt with, a survey of previous systems being given, and a criti- 



