SAHLBERG. — JOHN SCOTT. XXIX 



specimens of Swedish insects; and Fieber was also 

 assisted by loans of insects named by Redtenbacher, 

 Florren, Mayr, and Heller, and by John Scott in 

 England. Eeiber's French translation contains some 

 valuable etchings of European CicadinsG executed by 

 Fieber himself ; but as several drawings were missing 

 from his collection at the time of his death, the plates 

 could not be consecutively arranged in M. Reiber's 

 translation. The loss of manuscript also may explain 

 the absence of an Index, which would have proved a 

 great help to find one's way. The first part of the 

 Memoir describes one hundred and seven European 

 genera. The second part describes the species com- 

 prised in the Membracidae, the Cicadidae, and the 

 Issidae ; whilst the third and fourth parts deal with 

 the Fulgoridge up to Stiroma. Thus the Acocephalidse 

 and the Jassidae are left undescribed. This hiatus has 

 been in part filled up by M. Victor Signoret, who 

 wrote an ' Essai sur les Jassides et les Acocephalides ' 

 of Stal and of Puton. 



This general treatise was published in 1878, in the 

 ' Ann. de la Soc. Ent. de France,' and is embellished 

 with nine plates, with detailed drawings of the before- 

 mentioned genital plates and styles comprised in the 

 pygophore. The ' Essai ' describes many insects 

 inhabiting the areas of Europe, India, Russia, North 

 America, and Australia. The subject-matter therefore 

 spreads over too large a field to be of much service to 

 the specialist of British forms. 



Another valuable work, entitled ' Notiser ur Salls- 

 kapets pro Fauna et Flora Fennica,' appeared at 

 Helsingfors in 1871, written in Latin and Swedish, by 

 John Sahlsberg. As the latitudes of Finland and 

 Scandinavia are not very different from those of Great 

 Britain, a large number of the smaller Cicada are 

 common to the two countries. Sahlsberg's descriptions 

 are clear, but they are too voluminous. The venation 

 of the wings is well drawn, for thirty-five genera, and 

 these outlines will be found to be a considerable help 



