Family Dolichopsyllidae Baker 51 



with a number of small setae. Sternite VIII armed at the apex 

 with two robust bristles on a side. Spring of the penis not long, 

 not completing a single turn. For further details concerning 

 the structure of the male genitalia, see Plate XII, fig. 59. 



Female. General structure essentially as in the male. Head 

 of the receptaculum seminis broad, about as long as the tail. 

 Sternite VII divided into two lobes by a broad sinus; the upper 

 lobe acutely pointed and projecting slightly more distad than 

 the lower lobe. For further details concerning the structure of 

 the female genitalia, see Plate XII, fig. 58. 



Eastern hosts. Ruffed Grouse ("Bonasa umbellus") , Cat- 

 bird ("Galeoscoptis carolinensis") , Ovenbird (Seiurus auro- 

 capillus (Linnaeus) ) , Veery (Hyclocichla fuscescens jusces- 

 cens (Stephens) ) , Robin (Planesticus migratorius migratorius 

 L.), Bluebird (Sialia sialis sialis (Linnaeus)), House-wren 

 (Troglodytes aedon aedon Vieillot) . 



Eastern localities. Massachusetts, Minnesota, New York, 

 New Hampshire. 



Type material. Male holotype from Okanagan Falls, British 

 Columbia, on "Colymbus holboelli" in the N. C. Rothschild 

 Collection (British Museum) . A female paratype of C. rileyi 

 Liu from Minnesota, a synonym, in the United States National 

 Museum. 



Ceratophyllus idius Jordan and Rothschild 



(Plate I; Plate XII, figs. 60, 61) 



1920 Ceratophyllus idius Jordan and Rothschild, Ectoparasites, 1:73, figs. 



70, 71, 72. 

 1928 Ceratophyllus idius Jordan, Nov. Zool., 34:183. 

 1933 Ceratophyllus idius Jordan, Nov. Zool., 39:75. 

 1937 Ceratophyllus idius Jordan, Nov. Zool., 40: 285. 



Male. Chaetotaxy of the head as in C. diffi,nis. Pronotum 

 armed with a single row of bristles and a ctenidium consisting 

 of about sixteen spines on a side. General structure not differ- 

 ing in any noteworthy respects from the other species of the 

 genus. Modified segments: Process of the clasper broad, 

 rounded distally, about four-fifths as long as the movable finger, 

 its apex armed with one robust bristle and several smaller ones. 

 Movable finger three times as long as broad, the posterior mar- 

 gin strongly rounded apically, armed with three or four stout 

 bristles and several smaller ones. Posterior border of sternite 

 VIII with numerous weak bristles distally, the apex armed with 

 two or three long stout bristles on a side. For further details 



