Ewing — Significance of Parasitism in Acarina. 39 



PTERODECTES Robill. 

 p. orthygometrae (Can.)— Orthygometra pusilla (Pall.), O. porzana 



(L.). 

 P. actitidis (Can.)— Totanus hypoleucus (L.), Tringa sp. 

 P. edwardsi (Trt.) — Acrocephalus arundinaceus (L.), Sylvia galactodes 



Teram. 

 P. rutilus Robin — Chelidonaria urblca (L.) and related species. 

 P. muticus Banks — Poocaetes gramineus (Gmel.), Sayornis phoebe 



(Lath.). 

 P. bilobatus Robin — Anthus trivlalls (L.), Alauda arvensis L. 

 P. gracilis Trt. — Ostlnops decumanus (Pall.), Xanthura yncas (Bodd.), 



Cyanocorax chrysops (Vieill.). 

 P. paradisiacus Trt.— Paradisea minor G. Shaw, Sericulus melinus 



(Lath.). 

 P. gracilior Trt.— Topaza pella (L.), Chrysolampis mosquitus (L.), 

 Lophornis ornatus (Bodd.) and other Trochilidae. 

 P. mainati var. aculeata Can. — Eurylaemus ochromelas Raffl., Lampro- 



colius glaucovirens Ell. 

 P. trochilidarum Trt. — Upon Trochilidae, Chrysolampis mosquitus (L.), 

 Topaza pella (L.), Lophornis ornatus (Bodd.). 

 Cyanolesbia mocoa (Del. & Bourc). 

 P. gladiger Trt. — Upon Trochilidae, Chrysolampis mosquitus (L.), Eu- 



lampis Jugularis (L.). 

 P. aelenurua Trt. — Cyanolesbia mocoa (Del. & Bourc), Topaza pella 

 (L.). 



PTEROPHAGUS Megll. 

 P. strictui Mfign. — Upon Columbldae. 



Epidermopteae. 



HETEROPSORUS Tl't. & NeUEQ. 

 B. pteroptopus Trt. & Neum. — Acrocephalus streperus (Vieill.), Eritha- 



cus cyaneculus (Wolf.), Emberiza cir- 

 lus L., E. schoenlclus (L.). 



PACHYLicHUs Can. 

 P. erassus Can. — Erithacus phoenicurus (L.), Dendrocopus medlus 

 (L.). 



MicROLicHUs Trt. & Neum. 

 M. avus (Trt.)— Gallinago major (Gm.), G. nigripennis Bp., Dendroco- 

 pus medius (L.), Garrulus glandarius (L.), Eulam- 

 pis holosericeus (L.), Passer domestic us (L.). 



