514 PROCEEDINGS OF THE ACADEMY OF [Juiie, 



Local Distribution. — Restricted to the Pine Barrens, where it 

 appears to be only locally frequent. 



Ecological Distribution. — Apparently similar to luridus, with 

 which it was associated in the only locality Avhere I have collected it. 

 Always in our region in pine or mixed pine and oak woods. 



Locality Records. — 



Pine Barrens. — Jamesburg (Davis); East Plains (Davis); Lake- 

 hurst (Davis) ; White Horse (Rehn) ; near Harris (Rehn) ; Staff ords 

 Forge (Hebard); Atsion (Rehn, Hebard); Manumuskin, quite 

 common in the undergrowth and in the border shrubbery of mixed 

 oak and pine woods (Fox). 

 M. stonei Rehn. 



General Range. — Pine Barrens of New Jersey. 



Local Distribution. — Restricted to the Pine Barrens, and so far 

 reported only from its northern portion. 



Ecological Distribution. — "Low scrub under mixed pine and 

 oak and bare sand near pine woods" (N. J. 8t. Mus. Rep.). 



Locality Records. — 



Pine Barrens. — Between Harris and White Horse (Stone and 

 Rehn); Atsion (Rehn); Staff ords Forge (Rehn). 



M. differentialis (Thomas). 



General Range. — Southern Michigan and Minnesota to south- 

 eastern Tennessee, Louisiana and Texas, west to the Rocky Mts.; 

 local east of the Alleghanies in the vicinity of Philadelphia.^- 



Local Distribution. — Abundant, at least locally, in the low 

 marshy lands adjoining the lower Delaware River and its tributaries. 



Ecological Distribution. — Characteristic of alluvial lowlands, 

 frequenting the dense succulent grasses of the marshes — e.g., Homalo- 

 cenchrus oryzoides — and the rank vegetation about their borders, 

 especially the tall ragweed (Ambrosia trifida) ; spreading from such 

 locations to the adjoining upland fields and gardens. 



Locality Records. — 



Middle District. — Philadelphia (Seiss, Rehn); West Philadelphia, 

 in Botanic Gardens of the Univ. of Pa. on gravelly upland (Fox) ; 

 Bartram's Garden, in fields and thickets on upland terrace (Fox) ; 

 Philadelphia Neck (Rehn) ; Elmwood, in Tinicum Meadows, abund- 

 ant (Fox) ; Essington, in Tinicum Meadows, frequent (Fox) ; 

 Newcastle, frequent in rank vegetation bordering Delaware River 

 marshes (Fox). 



«Sop Rehn, Cnnad. Eiilom.. Vol. XXXII, 1010, p. 2S. 



