MALAYSIAN PARASITES IX 
NOTES ON THE TAXONOMY OF TROMBICULID MITES 
WITH DESCRIPTION OF A NEW SUBGENUS 
By 
J. R. AUDY 
Contents Page 
The Taxonomic Importance of Various Characters 124 
Interpretation of recurrent polyphyletic characters: 
Variation in extension of the scutum 126 
Scutal submergence and cuticular encroachment 126 
Division of femora of legs II and III 126 
Modification of setae 127 
The postlarval stages: 
Diversity of larval/post-larval stages 127 
Standard measurements of nymphs/adults . ” 128 
Chaetotaxy of legs, nymphs /adults ... 128 
The structure of the scutum (crista), nymphs/adults 13 1 
The larval stage: 
Standard measurements 131 
Chaetotaxy 13 1 
Convergence of larval characters 133 
Complexes of “ seasonal ” forms 133 
Provisional Definition of Taxonomic Units of Old-world Chiggers . .134 
Family Trombiculidae 136 
Subfamily Trombiculinae 137 
A. Trombicula group of genera — with filiform sensillae : Genera Trombicula 
137; Fonsecia 148; Tecomatlana , Myotrombicula , Heaslipia , Novotrombicula 
149; Ipotrombicula , 150 
B. Schongastia group of genera — with expanded sensillae : Genera Schongastia 
150; Oenoschongastia , Radfordiana, Euschongastia 151; Ascoschongastia, 
Pseudoschongastia , Neoschongastia 155; Mackiena , Gunther ana 156; 
Doloisia 157; Riedlinia , Endotrombicula , 160 
Subfamily Gahrliepiinae=Walchiinae 161 
Family Leeuwenhoekiidae 163 
Subfamily Leeuwenhoekiinae 163 
Genera Acomatacarus , Hannemania , Whartonia , 164 
Subfamily Apoloniinae 166 
Family Trombidiidae 166 
Comments on checklist of Gunther, 1952 166 
Acknowledgments 167 
Summary 167 
References 168 
MALAYA , No. 26 : 1953 
