PSYCHE 
VOL. XXXII. JUNE 1925 No. 3 
THE MYSTERY OF THE SO CALLED “TRILOBITE 
LARVAE” OR “PERTY’S LARVAE” DEFINITELY 
SOLVED. 1 
By Eric Mjoberg. 
CONTENTS. 
I. Introduction 119 
II. Historical 120 
III. New Investigations 123 
IV. Neoteinic Females 128 
V. Methods of Securing Males of the ‘ Trilobite-larvae” 131 
VI Supposed Luminosity of the “Trilobite-larvae” 132 
VII. The First Known Male and Female of the “Trilobite-larvae”. . . . 133 
VIII. The Systematic Position of the Genus Duliticola 137 
IX. Food Habits of the “Trilobite-larvae” 140 
X. Different Species of “Trilobite-larvae” from Borneo 142 
XI. “Trilobite-larvae” from other Parts of the Oriental Region 144 
XII. Generali [Discussion of the Development of Lampyridae, Drilidae, 
Telephoridae and Lycidae 145 
XIII. Bibliography 151 
I. Introduction 
Among the many remarkable forms of insect life to be met 
with in the Oriental region none have aroused the interest of 
entomologists more than certain strange looking uncouth 
creatures, showing a great resemblance to the extinct trilobites 
in possessing protruding lateral processes on the abdominal seg- 
ments. From time to time various “trilobite-larvae” as they 
have been termed by English entomologists, have been figured 
and more or less superficially described. Although the first one 
was made known in 1831 by Perty no one has been able to breed 
them and state what they really are. They have been a standing- 
contributions from the Entomological Laboratory, of the Bussey Insti- 
tution, Harvard University, No. 249. 
