A. L. MELANOER 



From the Library of 

 J. M. ALDRiCH 



MONOGRAPH OF THE ROCKEFELLER INSTITUTE FOR MEDICAL RESEARCH, NO. 13, 

 NOX'EMBER 15, 1920. 



THE EARLY STAGES OF TABANID^ (HORSE-FLIES). 



By WERNER MARCHAND, Ph.D. 



{From !he Department of Animal Pathology of The Rockefeller Institute for Medical 



Research, Princeton, N. J.) 



Plates 1 to 15. 



(Received for publication, April 23, 1917.) 



CONTENTS. 



Introduction 4 



History of investigations 7 



Chronology 15 



Tabanidas, description of early stages 17 



Bionomics 27 



Special anatomy of tabanid larvae; Graber's organ 29 



Chrysops (Meigen) , early stages in general 44 



Chrysops himacidosa Neave 46 



" callidiis Osten Sacken 46 



" celer Osten Sacken 47 



" dispar Fabricius 47 



" Indus Osten Sacken 48 



" longicornis Macquart 48 



" magnifica, var. inornata, Austen 49 



" moechus Osten Sacken 49 



" mcerens Walker 50 



" relictus Meigen 52 



" vittatus Wiedemann 52 



" wellmani Austen 54 



Dorcaloemiis f adieus Austen 55 



Gaslroxides ater Saunders 55 



Goniops (Aldrich), early stages in general 56 



Goniops chrysocoma Osten Sacken 57 



HcBmatopota, early stages in general 66 



Hccmatopota crudelis Austen 66 



" decora Walker 67 



" insaiiabilis Austen 67 



" pluvialis Linne 67 



sp 73 



Hexatoma pellucens Linne 74 



1 



