SYLVILAGUS. 119 



length of mandible, 40; length of lower molar series, n. Ex type in 

 United States National Museum. 



Subgenus D. Tapeti. 



Sylvilagus aquaticus littoralis Nelson. 



Sylvilagus aquaticus littoralis'Nels., N. Amer. Fauna, No. 29, 1909, 

 P- 273. 



Type locality. Houma, Terrebonne Parish, Louisiana. 



Geogr. Distr. A narrow belt of swamps and marshes along the 

 Gulf coast, nearly if not entirely within the upper limits of tidewater, 

 from Bay St. Louis, Mississippi, west through Louisiana to Matagorda 

 Bay, Texas. Vertical range below 50 feet altitude, wholly within the 

 lower austral zone. 



Color. Top of head f errugineous ; nape dark rufous; upperparts 

 mixed black and cinnamon-buff; becoming deeper buff on the rump; 

 flanks paler buff, no black; top of fore legs rusty buff; underparts 

 dull grayish brown; top of hind legs pale rusty; lower back beneath 

 a patch of dark buff ; rest of. underparts white ; tail above mixed black 

 and rusty, beneath white; ears brown. Ex type in United States 

 National Museum. 



Measurements. Skull: Total length, 85.6; Hensel, 68.3; zygo- 

 matic width, 40.4; intertemporal width, 18.3; length of nasals, 29.3; 

 length of upper molar series, 15.7; length of mandible, 40.7; length of 

 lower molar series, 15.4. Ex type in United States National Museum. 



Subgenus E. Microlagus. 



Sylvilagus bachmani exiguus Nelson. 



Sylvilagus bachmani exiguus Nels., Proc. Biol. Soc. Wash., XX, 

 1907, p. 84. 



Type locality. Yubay, central Lower California, Mexico. 



Geogr. Distr. Arid middle part of peninsula of Lower California 

 from Alamo Plain and Trinidad Valley south to Comondu. Vertical 

 range, from sea-level at San Quentin to about 7000 feet on San Pedro 

 Martir Mountains. Zonal range mainly upper and lower Sonoran 

 extending into Transition on mgun tains. 



Genl. Char. Similar to S. b. cinerascens, but ears longer and bullae 

 larger. 



Color. Top of head and back pinkish buff lined with black, the 

 tips of the hairs being of that color; flanks and rump gray; outer 



