28 
Ritsema Cz., C. On a few Coleoptera from the island of 
Riouw, z. pi. (Notes Leyd. Mus., 1887, vol. 9). 
On some Sumatran Coleoptera with description 
of a new genus and species of Longicorn. z. pi. (Notes 
Leyd. Mus., 1889, vol. il). 
On the new Cetonidae collected during the recent 
scientific Sumatra-expedition. z. pi. (Notes Leyd. Museum). 
On three species of the coleopterous genus Helota. 
z. pi. (Notos Leyd. Mus., 1914, vol. 36). 
Pelargoderus Sythoffii, n. sp. z. pi. (Notes Leyd. 
Mus., 1901, vol. 23). 
Protective resemblance between the species of 
Nothopeus Pasc. and fossorial wasps, z. pi. (Notes Leyd. 
Mus., 1912, vol. 34). 
— — — — Remarks on Hymenoptera and Coleoptera. z. pi. 
(Notes Leyd. Mus., 1885, vol. 7). 
Second supplementary list of the described species 
of the genus Helota. z. pi. (Notes Leyd. Mus, vol. 35, 
I9I3)- 
Second supplementary list of the described species 
of the melolonthid genus Apogonia. z. pi. (Notes Leyd. 
Mus., vol. 25, 1903). 
Synopsis and list of the Helota-species known 
from Insulinde, with description of a new species from 
the island of Sumbawa. z. pi. (Notes Leyd. Mus., 1914, 
vol. 36). 
The hitherto known African species of the genus 
Helota. z. pi. (Notes Leyd. Mus., 1903, vol. 25). 
— Two new Asiatic species of the coleopterous 
genus Helota. (Notes Leyd. Mus., 1914, vol. 36). 
Two new species of the genus Helota from 
Borneo, z. pi. (Notes Leyd. Mus., 1891, vol. 13). 
Two new Sumatran species of longicorn Cole- 
optera. z. pi. (Notes Leyd. Mus., 1912, vol. 34). 
Une nouvelle espèce chinoise du genre Helota. 
z. pl. (Bull. Mus. hist, nat., 1906, n°. 4). 
Zonopterus perversus. n. sp. (Notes Leyd. Mus., 
1914, vol. 36). 
