MITES OF SUBFAMILY HAEMOGAMASINAE — KEEGAN 205 



Genus ACANTHOCHELA Ewing. 1933 



1933. A. chilensis Ewing 



Genus EUHAEMOGAMASUS Ewing, 1933 



1925. E. reidi (Ewing) 1933. E. oregonensis Ewing 



1925. E. liponyssoides (Ewing) 1933. E. utahensis Ewing 



1933. E. onychomydis Ewing 1946. E. sciuropteri Keegan 



Genera and species of Haemogamasinae herein recognized as valid 

 are as follows : 



Genus HAEMOGAMASUS Berlese, 1889 



1889 H. hirsutus Berlese 1931. H. avisugus Vitzthum 



1916. H. meriensis Hirst 1931. H. mandschuricus Vitzthum 



1925. H. alaskensis Ewing 1951. H. harperi, new species 



Genus EUHAEMOGAMASUS Ewing, 1933 



1872 E. ambulans (Tliorell) 1925. E. iarheri (Ewing) 



1892 E horridns (Micliael) 1926. E. quadrisetatus (Vitzthum) 



1914. E. oudemansi (Hirst) 1951. E. liponyssoides occidentalis, new 

 1925. E. liponyssoides (Ewing) subspecies 



ISCHYROPODA, new genus 



1951. /. spiniger, new species 



1951. /. armatus, new species 



The foregoing lists reflect changes in status of several species, dele- 

 tion of one genus from the subfamily, and addition of four new spe- 

 cies and one new genus. 



1. Oudemans (1913) and Vitzthum (1931) doubted that H. ameri- 

 canus Banks, 1905, and H. sanguineus Ewing and Stover, 1915, were 

 actually members of genus HaeTnogamasus. Examination of type 

 material supported their views, as the type of E. amerlcanus proved 

 to be a specimen of Liponissus and that of H. sanguineus to be an 

 undetermined member of the same genus. 



2. E. utahemis Ewing, 1933, lacks the fimbriate epistome of the 

 Haemogamasinae and, because of its distinctly abbreviated sternal 

 shield, will be redescribed elsewhere as representing a new genus of 

 Laelaptidae. 



3. Several instances of synonymy are corrected: (a) H. horridus 

 arvicolaruin Berlese, 1920, redescribed as H. arvicolamm (Berlese) by 

 Turk (1945) , is considered a synonym of E. horridus (Michael, 1892') ; 

 (b) H. sternalis Ewing, 1933, is considered a synonym of H. alaskensis 

 Ewing, 1925; (c) E. microti Ewing, 1925, is considered a synonym 

 of 'E.tarheri (Ewing, 1925) ; and (d) E. mdi Michael, 1892, E. twit- 

 chelli Ewing, 1925, E. reidi (Ewing, 1925), E. onychomydis Ewing, 

 1933, E. oregonensis Ewing, 1933, and E. sciuropteri Keegan, 1946, are 

 considered synonyms of E. ambulans (Thorell, 1872), which is here 

 transferred from Eulaelaps Berlese, 1903, to the genus Euhaemoga- 

 masu^. 



