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 Aischnid with which we 
got to very close quarters on September 10th ; judged by its size 
and manner of flight, if must have been 47. miata. 
33, Maude Terrace, Walthamstow: 
Dec. Ist, 1908. 
LIST OF PAPERS OF THE LATE MARTIN JACOBY. 
By GEorGE JACOBSON. 
Aux the numerous entomological publications (one hundredand 
forty-one in number) of the late Martin Jacoby (who died Dec. 
24th, 1907) are devoted to one family of beetles only, to the Chry- 
somelide 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 Chrysomelide.* 
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 Chrysomelide exclusively, and 
never went beyond it. Even in the family he seems to have 
ignored two large subfamilies: Cassidini and Hispini. More- 
over, of Palwarctic 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 revisions with some descriptive material), 
and Nos. 106, 116, 117, 180, 181, and 186 (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 
coleopterist (even Baly in England) has described so many forms as the late 
Martin Jacoby. 
