36 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I23 



(dorsal) margin of apex to posterior (ventral) margin; basal half of 

 dorsal margin semimembranous ; with four or five long ventromarginal 

 bristles and many smaller marginal and lateral bristles occurring both 

 on the sclerotized and membranous parts. 



Aedeagus (figs, iii, 112). — Distolateral lobe (DL.L.) broader at 

 base than at rounded apex, shaped like a broad, blunt arrow ; longer 

 than sclerotized inner tube. Central thickening (C.TH.) at proximo- 

 ventral angle. Sclerotized inner tube (S.I.T,) with a conspicuous 

 long, subapical, dorsal spur (A.I.T.), in addition to the typical short 

 spurnear midpoint. Lateral lobes (L.L.) relatively narrow. Crochets 

 (CR.) obtuse ; proximal portion broader than subacute apical portion. 

 Accessory lateral lobes (A.L.L.) relatively broad. 



Female. — Posterior margin of seventh sternum (fig. 60) with small 

 triangular upper lobe, below this a small, shallow sinus, remainder 

 of caudal margin straight. Spermatheca (fig. 60, SP.) head about 

 same length as tail ; tail somewhat narrower at insertion of head than 

 is usual in genus. 



Length. — Male, 1.9-2.5 mm.; female, 2.5-2.8 mm. 



Holotype. — Female from Didelphis virginianus Kerr, Rolling Rock 

 Club, Ligonier, Pa. 



The range of catatina is the eastern United States and Canada. 



Records of Specimens Examined 



Canada. Labrador (Clethrionomys gapperi protens, "gray vole") ; Quebec 

 (C. g. protens). 



United States. Maine: Piscataquis County {Clethrionomys gapperi ochra- 

 ceus). Massachusetts: Worcester County (C gapperi). New Hampshire: 

 Carroll County (C g. ochracens) . New York: Greene County (C. gapperi) ; 

 Hubbardsville (C g. gapperi) ; Tompkins County (Blarina brevicauda, Clethri- 

 onomys gapperi gapperi). Pennsylvania: Pike County {Blarina brezncauda) ; 

 Wayne County {Clethrionomys gapperi, Microtus chrotorrhinus) . Tennessee: 

 Great Smoky Mountains National Park {Peromysciis maniculatus nubiterrae). 



PEROMYSCOPSYLLA SILVATICA SILVATICA (Meinert, 1896) 



Figures 65, 67, 71, 72, 113 



Typhlopsylla silvatica Meinert, Ent. Medd., vol. 5, pp. 184, 192, 1896. 

 Ctenopsyllus silvatica Rothschild, Ent. Month. Mag., vol. 45, p. 184, 1909. 

 Leptopsylla silvatica Jordan, Nov. Zool., vol. 38, pp. 257, 259, 263, fig. 13, 1932; 

 Mitt. Naturw. Inst. Sofia, vol. 5, p. 147, 1932. 



Head. — As in hesperomys but upper genal spine the longer and 

 genal lobe very short ; bristles on apex of second antennal segment 

 less than one-half length of club in male, three-fourths length in 

 female ; postantennal area with four regular rows of bristles. 



