MAMMALS OF MARYLAND 



49 



Figure 18. — Distribution of Lasionycteris noctivagans. 



segregation of the sexes and the large colonies seem to be composed 

 primarily of females. Solitary animals are usually males. 



The breeding habits of this species are not well known, but accord- 

 ing to Jackson (1961, p. 86) it usually has two young, bom blind and 

 nearly naked, the last part of June or early in July. The young remain 

 clinging to the breast of the mother until they are about 3 weeks old, 

 when they are able to fly and shift for themselves. A single litter is 

 produced each year. 



The silver-haired bat feeds entirely on nocturnal insects, particularly 

 those that fly high in the woodlands or over the borders of watercourses 

 with wooded banks. 



Specimens examined. — Montgomery County: Great Falls, 1; Plum- 

 mers Island, 1. Prince Georges County: Laurel, 1. District of Colum- 

 hia: 5. 



Other records and reports. — Prince Georges County: Patuxent Ee- 

 search Center (Gardner, 19506, p. 112) . 



EASTERN PIPISTRELLE 



Pipistrellus subflavus subflavus (F. Cuvier) 



Ylespertilio]. subflavus F. Cuvier, Nouv. Ann. Mus. Hist. Nat. Paris, 

 1 : 17, 1832. 



Type locality. — Georgia, restricted to the LeConte Plantation, 3 miles SW Rice- 

 boro, Liberty County, by Davis (1959, p. 522). 



