28 REPORT OF NEW JERSEY STATE MUSEUM. 



junction with the Piedmont Plain. This contains the hilly 

 country of most parts of Hunterdon and Morris, and of smaller 

 areas in Passaic and Bergen Counties. It extends from Riegels- 

 ville on the Delaware north to the junction with the Appalachian 

 above Phillipsburgh. From the Delaware it extends irregularly 

 eastward to the vicinity of White House Station on the Central 

 Railroad of New Jersey. From that point it extends northeast 

 in a very irregular line to the northern boundary, taking in Morris 

 Plains, Boonton and Butler near the edge of the line. It extends 

 as a narrow border along the northern line of the State and sends 

 two spurs to the south. One of these spurs includes the Palisades 

 and Highlands along the western shore of the Hudson River, to 

 Hoboken. The second extends southward to Paterson, is there 

 broken by the Passaic Valley and then takes in the narrow ridge 

 of the Orange or Watdiung Mountains, the southern tip coming 

 near to^ Somerville. This region is rolling or hilly in character, 

 with deciduous forests, and contains much area under cultivation. 

 The transition element is marked though not conspicuous in this 

 region, and many of the New York species come into it. A 

 large part of the Orange Mountain and Palisade districts have 

 been thoroughly collected in some of the orders, but along the 

 northern border little has been done except in the Greenwood 

 Lake district, and in the more central portion only the Hopat- 

 cong territory has been explored. The Ramapo Mountains are 

 almost unknown entomologically, and so indeed are most of the 

 ridges in line with and parallel to the Green Pond Mountain. 



The Piedmont Plain takes in the great red sandstone region, 

 \vhich is quite sharply bounded on the south by a line extending 

 rather evenly southwest from the mouth of the Raritan River to 

 Trenton. From Trenton it extends along the Delaware nearly 

 to Riegelsville, and it fills in to the north everything to the edge 

 of the Highlands, but does not quite extend to the shore line on 

 the east. This area is largely under cultivation, has no great 

 elevations, but has many large swamp areas and low meadow 

 regions. The forests are deciduous and insect life is less 

 abundant than to the north or south. There are a number of 

 distinctive features in this region which are interesting: the 

 elm-leaf beetle is strictly one-broodecl, while in the Delaware 



