10 THE ENTOMOLOGIST. 



dorsal aspect of thorax and abdomen brownish yellow ; abdomen 

 without white powder on ventral surface. 



(14) Lestes sponsa was plentiful in one locality on August 10th ; 

 a few of the males were immature, and deficient in blue powder 

 on those parts which take on a pruinose condition in later life. 

 The species was again met with, at another locality, on August 

 16th. 



Among dragonflies seen but not taken may be mentioned a 

 single Calopteryx (June 14th), and an iEschnid with which we 

 got to very close quarters on September 10th ; judged by its size 

 and manner of flight, it must have been ^E. mixta. 



33, Maude Terrace, Walthamstow : 

 Dec. 1st, 1908. 



LIST OF PAPERS OF THE LATE MARTIN JACOBY. 

 By Geobge Jacobson. 



All the numerous entomological publications (one hundred and 

 forty-one in number) of the late Martin Jacoby (who died Dec. 

 24th, 1907) are devoted to one faniily of beetles only, to the Chry- 

 somelida" or Phytophagous beetles. The author has described 238 

 genera, 5094 species, and 7 varieties in this family. According 

 to this enormous number of described species, which embraces 

 one-fourth of all the known species of the family, we must range 

 M. Jacoby in the first place among workers in the field of 

 descriptive morphology of Chrysomelidse.* 



Jacoby's influence as authority within the narrow limits of 

 this family is particularly great, because he concentrated his 

 attention on the study of the Chrysomelidse exclusively, and 

 never went beyond it. Even in the family he seems to have 

 ignored two large subfamilies : Cassidini and Hispini. More- 

 over,, of Pala?arctic forms he described only one species from the 

 Island of Crete, and a few species from Japan and North China. 

 The great majority of his papers are purely descriptive, except 

 Nos. 68, 88, 90, 123, 124, and 127 (concerning external morpho- 

 logy of separate groups and genera), Nos. 11 and 140 (repre- 

 senting two faunistic revi-eions with some descriptive material), 

 and Nos. 106, 116, 117, 130, 131, and 136 (of general systematic 

 interest). 



1. Description of New Genera and Species of Phytophagous 

 Coleoptera. Proc. Zool. Soc. London, 1876, pp. 807-817. [1 new 

 genus, 21 new species, 1 new variety.] 



''■ We possess no data concerning the numbers of species described within 

 limits of this family by other specialists, but there is no doubt that no other 

 coleoptevist (even Baly in England) has described so many forms as the late 

 jMarrin Jacobv. 



