iM 
(328) 
XVI. Predaceous Insects and their Prey. By Epwarp B. 
Poutton, D.Sc., M.A., LL.D. Princeton, F.R.S., 
Hope Professor of Zoolozy in the University of 
Oxford, Fellow of Jesus College, Oxford. 
PARE i; 
Predaceous Diptera, Newroptera, Hemiptera, Orthoptera, and 
Coleoptera, 
[Read June 6th, 1906. ] 
CONTENTS OF Part I. 
PAGE 
INTRODUCTION TO Part I . : : , : : ot: 
Ii, IDIURAM Slaw : : ; : ? 3 . 329 
A, ASILIDAM AND THEIR PREY ; : : , 50 BRE 
PROPORTIONS OF THE SEXES : . : - «ey 
ANALYSIS OF PREY . 359 
CONCLUSIONS AS TO THE Hanrrs OF THE SPECIES AND 
GENERA OF ASILIDA) RECORDED IN THIS MeEmoIR . 364 
LI. DASYPOGONINA . : ; : . 3864 
Dioctria . 3 : . 364 
The Prey of Dasypogon diadema ; 365 
The Courtship of Dasypogon (Selidopog gon) d iadema 366 
Dasypogon (Selidopogon) diadema, a mimic of its 
most conspicuous victims . : ; . 3868 
Remaining Genera of the Dasypog goninze ‘ . 369 
Il, LAPHRINA : : : - : : eA 
TIf, ASILINA . : : : : ¢ - 870 
The Prey of Pronasion 3 F meeoyel 
The Prey of Alcimus and allied gener Ga” We 3 312 
Philonicus, Pamponerus and Asilus . 373 
An observation on the cryptic attitude of Asilus 
crabroniformis during prolonged rest j 374 
Lophonotus, Dysmachus, and Hutolmus —. 374, 375 
The Prey of Machimus . ‘ : . 3875, 376 
Neoitamus and Epitriptus . : a. wlovee 1A 
Mimicry iN ASILID# RECORDED With PREY. Pi 
B. EMPIDA AND THEIR PREY . é 379 
ANALYSIS OF THE PREY OF RECORDED Sproms OF 
EMPIDA AND OF THE SEXES OF THE CAPTORS . 386 
Proportion of the Sexes. . 388 
Female Empidx with Prey couptur ed in coitu . 388 
The choice of Prey by Empidz Paine Empine 
and Tachydromine) . . 3888, 389 
C. PREDACEOUS DIPTERA OTHER THAN ASILIDA 
AND EMPID#A, WITH :THEIR PREY . . Sood 
Dolichopodide, Anthomyide, and Co Be ae . 393 
The Prey of Scatophaga . . 393 
Ochromyia jejwna. 394 
The Prey of the larval Syrphid fly, Xanthandrus 
comtus (Melanostoma hyalinatum) . ; 396 
TRANS. ENT. SOC. LOND, 1906.—PART II. (JAN.) 22 
