Family Dolichopsyllidae Baker 63 



usually with a deep sinus dividing the posterior margin into 

 two lobes (Plate XVI, fig. 81) , but sometimes with the sinus 

 exceedingly shallow or absent. 



Records. MINNESOTA— No specific locality, September 13, 

 1933, on Glaucomys sabrinus canescens Howell, male. NEW 

 YORK — Long Lake, July, 1926, on "Sciurus hudsonicus," two 

 males, two females (R. T. Hall) ; Adirondack Lodge, Essex 

 County, August 12, 1925, on same host, male and female (F. 

 Harper) ; Vulcan Island, Lake Champlain, September 10, 1936, 

 on same host, male and female. 



Eastern hosts. Flying Squirrel (Glaucomys sabrinus 

 canescens Howell) , Red Squirrel (Sciurus hudsonicus loquax 

 Bangs, etc.) , Gray Squirrel (Sciurus carolinensis leucotis 

 (Gapper) ) . 



Eastern localities. Massachusetts, Minnesota, New York, 

 (Canada) . 



Type material. A series from Banff, Alberta, on Mustela 

 americana in the N. C. Rothschild Collection (British 

 Museum). Male and female from this lot in the United States 

 National Museum. 



Orchopeas sexdentatus pennsylvanicus (Jordan) 



(Plate XVI, figs. 79, 83, 84) 



1928 Ceratophyllus sexdentatus pennsylvanicus Jordan, Nov. Zool., 34: 184, 

 figs. 8, 9. 



1929 Ceratophyllus sexdentatus pennsylvanicus Jordan, Nov. Zool., 35:31. 

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



Male. Preantennal region of the head armed with two rows 

 of bristles; the upper row with three in addition to those near 

 the antenna, the lower row consisting of three much stouter 

 ones. Postantennal region differing from the other eastern 

 species of the genus in that there are but two bristles in addition 

 to the marginal row of five or six (Plate XVI, fig. 79) . Other 

 general structural details essentially as in O. wickhami. Modi- 

 fied segments: Process of the clasper prominent, thumblike, 

 rounded at the apex. Posterior margin of the movable finger 

 usually armed with five spiniforms, but sometimes with four or 

 six. For further details concerning the structure of the male 

 genitalia, see Plate XVI, fig. 84. 



Female. Chaetotaxy of the head essentially as in the male 

 except that the bristles of the upper preantennal row are more 

 irregular and weaker. Receptaculum seminis as in O. wickhami. 

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



