Family Dolichopsyllidae Baker 65 



1S28 Ceratophyllus leucopus Jordan, Nov. Zool., 34:179. 



1929 Ceratophyllus leucopus Jordan, Nov. Zool., 35: 28, 170, 176. 



1933 Ceratophyllus leucopus Stewart, Jour. New. York Ent. Soc, 41:257. 



1933 Ceratophyllus leucopus Jordan, Nov. Zool., 39: 62. 



1933 Orchopeas leucopus Jordan, Nov. Zool., 39: 72. 



1934 Orchopeas leucopus Shaftesbury, Jour. Elisha Mitchell Sci. Soc., 

 49:255. 



1937 Orchopeas leucopus Jordan, Nov. Zool., 40:284. 



Male. Bristles of the preantennal region of the head veri- 

 similar in arrangement to those of O. sexdentatus. Postantennal 

 bristles arranged as in O. wickhami. Labial palpus barely 

 reaching to the apex of the fore coxa (Plate XV, fig. 74) . 

 Modified segments: The genitalia closely resemble those of 

 O. wickhami, the main differences being in the shape of the 

 movable finger. These differences may be readily appreciated 

 by an examination of Plate XV, figs. 75 and 78. 



Female. Chaetotaxy of the head essentially as in the male; 

 the bristles of the upper preantennal row may be reduced in 

 number and size. The structure of sternite VII and of the 

 receptaculum seminis as in O. wickhami. 



Records. DISTRICT OF COLUMBIA— Washington, March 

 16, 1932, on "Peromyscus leucopus," female (R. Greenfield) . 

 GEORGIA — Blood Mountain, June 3, 1934, on Peromyscus 

 maniculatus nubiterre (Rhoads) , male, three females; Tray 

 Mountain, June 13, 1934, on Peromyscus leucopus leucopus 

 (Rafinesque) , female, two males; Okefmokee Swamp, Janu- 

 ary 28, 1936, on Peromyscus gossypinus gossypinus (LeConte) , 

 four males, four females (F. Harper) . IOWA — Ames, March 3, 

 1938, on "white-footed mouse," male (I. Fox) ; same locality, 

 1935, on "Microtus pennsylvanicus," female (R. L. Rouda- 

 bush) ; Dubuque, November 11, 1937, on Peromyscus leucopus 

 noveboracensis (Fischer) , female; Peru Bottoms, November 

 10, 1938, on same host, numerous specimens; Waukon, Novem- 

 ber 12, 1937, on Blarina brevicauda brevicauda (Say) , two 

 males, three females (T. Scott). MAINE— Mount Katahdin, 

 August-September, 1928, on Peromyscus manicidatus abietorum 

 (Bangs) , numerous specimens (W. J. Hamilton, Jr.) . MARY- 

 LAND — College Park, May, 1929, on "Peromyscus leucopus." 

 numerous specimens (H. E. Ewing and H. S. Peters) ; Febru- 

 ary 17, 1932, same host and locality, three females (R. Green- 

 field) ; Riverdale, July 4, 1934, on "white-footed mouse," fe- 

 male (F. C. Bishopp) ; Burnt Mills, March 22, 1932, on "Pero- 

 myscus leucopus," two females; Chevy Chase, June, 1932, on 

 same host, male and female (R. Greenfield) ; Dorchester 



