ON THE MORPHOLOGY OF THE OVIPOSITOR OF 
CERTAIN ANTHOMYIAN GENERA* 
HucuH C. HUcKETT. 
CONTENTS. 
Mar qO\SIEKOLC COs clarks ce CR Che a ER eRe MSO Iais G Scio Mich Lino eA ae a - dine odlots 290 
Plateslustratinesotauctural’ Tertias\\. aan cere ree eee eee 291 
AiselonaVChCl an o tekee ete eS a WS eas ORG a mul oui nid ca goes teee 291 
GeneralgMiorpholosy of the Ovipositompeaee emererr nee eee 292 
lisa eet 016.5 ) Of \cul 1 nee PER cs cic Ss in ictindingihtso open Cio DA GO hd O.8'6 ood 295 
Beseription of Ovipositors. +. 2/5) eae pee ae rn ne eee 296 
Genus *Chortophila.': cree oe ee Oe ee ao Ee ree 296 
Getius Hylemyia... 4.0 sai te ade aera Be aCe ene ae 307 
Getius Pesomiyian, 2: def wih 2 leo ag ae Oe eee eee a 312 
<=) see eee en eine eer NT A re MENA Ae en Ren ies Meer 5, Sie vn Goud s 317 
ReferenGesia. s caiusa dete Metts OS raapeeieta Aust oe RI TRAE ACTER TE aon 319 
LASt; Of Plates... icine oo Sepsis is AE GR ee OAL ROE Lee eee 320 
INTRODUCTION. 
This difficult family of flies has caused not only the sys- 
tematist but also the economic entomologist no little mis- 
apprehension due to the unsatisfactory conception of existing 
taxonomic characters. The generic definitions are also ambig- 
uous and are at present undergoing a thorough revision. This is 
especially true of the three genera Chortophila Macquart, 
Hylemyia Desvoidy, and Pegomyia Desvoidy. The male 
species have been studied with a certain amount of detail and 
success, but the females have been neglected and owing to their 
peculiar characters are not capable of being classified according 
to male specimens. Stein (Archiv ftir Naturgeschichte 1914, 
viii: 4-55) has formulated a key for the determination of 
European female species and the paper has been largely used 
for the determination of the American species dealt with in the 
following pages. 
The unsatisfactory nature, however, of such a position 
lead the writer to undertake the morphological study of the 
ovipositors of certain species of the above named genera in 
the hope that it would at least aid in determining without further 
doubt the identity of any female specimen. 
The material for study was furnished by the Cornell Uni- 
versity Collection, Dr. O. A. Johannsen’s own. collection and 
the author’s specimens caught at Burlington, Ontario, and 
* Since this paper was prepared for publication, Malloch has introduced a 
new concept of the genera mentioned herewith. 
290 
