SOME NEW SYNONYMY IN THE HAEMOGAMASIDAE, 
LAELAPTIDAE AND DIPLOGYNIIDAE INDICATED 
BY AN EXAMINATION OF BANKS’ TYPES OF 
MESOSTIGMATA (ACARINA) 
By Donald E. Johnston 
Institute of Acarology, Department of Zoology, 
University of Mainland 
During the course of a study of certain of the Banks mite types in 
the collection of the Museum of Comparative Zoology at Harvard 
College some cases of obvious synonymy were found. Two of these 
cases sink Banks’ names; the remainder result in the establishment of 
his names as senior synonyms. In addition to those of Banks, the types 
of Ewing’s, Furman’s and Hicks’ species (all in U.S. National 
Museum) were examined in connection with this work. I am grateful 
to Drs. H. W. Levi and W. L. Brown for arranging for me to study 
the Harvard collection and for their many kindnesses during my visit. 
The following lectotvpe designations are not as precise as one 
would wish. T he Banks types in the Museum of Comparative 
Zoology are not numbered and most names are represented by cotypes. 
All of the suspected and certain type slides are arranged alphabetically 
according to species and kept as a unit in the Arachnida collection of 
the Museum. Thus the lectotypes designated herein will be found 
labeled as such in their proper place in the alphabetical filing scheme. 
It may also be noted here that some of Banks’ species (none of those 
treated herein) are represented by cotypes in both the MCZ and 
the Acarina collection of the U.S. National Museum. The same is 
true of Jacot’s material which has been divided evenly between these 
museums. 
Haemogamasidae 
Haemogamasus longitarsus (Banks) Comb. Nov. 
Lae laps longitarsus Banks, 1910. Proc. Ent. Soc. Wash. 12 (1) 15. 
Ex mole’s nest, Falls Church, Virginia. Lectotype in MCZ. 
Haemogamasus barberi Ewing, 1925* Proc. Biol. Soc. Wash. 38 : 
140. Ex nest of small mammal; Maryland shore of Potomac River, 
near Plummer Island. Type in U.S.N.M. new synonymy. 
Haemogamasus microti Ewing, 1925* Proc. Biol. Soc. Wash. 38: 
141. Ex Microtus pennsylvanicus , Bronxville, New York. Type in 
U.S.N.M. [ — barberi according to Keegan, 1951:249] 
Remarks: The type series of Laelaps longitarsus consisted of eight 
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