\x\ii. '21 | ENTOMOLOGICAL NK\VS 267 



they are not ordinarily typical. This appears to be especially 

 true in Kurlington County of another species, O. pnlchclluni, 

 which in that section typically occurs only in marshes, but which 

 at the time it becomes sexually mature often spreads in con- 

 siderable numbers over the surrounding higher lands. 



If, as seems highly probable, the occurrence of O. rolantum 

 in a dry, weedy field is to be explained as just suggested, we 

 may anticipate that the regular habitat of the species in southern 

 New Jersey will be found to be the marshes formed by the 

 ndal flats of the Delaware River and its tributaries. In Bur- 

 lington County, as apparently everywhere else in New Jersey 

 where these tidal flats are beyond the range of saline influence, 

 they are for the vastly greater part occupied by a dense stand 

 of Wild Rice, Zizanla palustris L. 5 On the side facing the 

 open water of the stream the Wild Rice is usually bordered 

 by a fringe of spatterdocks, Nymphaea advena Soland, while 

 on the landward side it intermingles with and is largely replaced 

 by a mixed herbaceous growth in which, as noted for instance, 

 on the Rancocas at the locality where my first specimen of O. 

 rolantnm was taken, the more abundant or prominent plants 

 included such forms as rose mallow, Hibiscus moscheutos L., 

 cat-tail, Typha lati folia L., tear-thumb, Polygonum arifolinui 

 L., touch-me-not, I ni pat tens hi flora Walt., and cardinal flower, 

 Lobelia cardinalis L. It was just about at the point where the 

 cransition takes place between the part of the marsh where the 

 wild rice is dominant and that in which it is replaced by the 

 aiixed growth mentioned that my specimen of t'olantiim was 

 taken at this locality. As no other specimens were secured here 

 it is not possible to state what parts of the marsh are most 

 favored by O. i-olaiitiiin. Any decision as to this matter was 

 largely prevented by the soft, treacherous character of the 

 ground occupied by the wild rice which made collecting in it 

 impossible without special equipment. 6 



3 Stone, Witmer, The Plants of Southern New Jersey, Report of the 

 New Jersey State Museum, Trenton, I'M 1. 



4 7>or<n(/,>;( urifoiuim (L) of Britton and Brown's illustrated Flora, 

 1913. 



r 'Z. aijiKiticn L. in Britton and Brown's Illustrated Flora. 



The writer is indebted to Mr. J. A. (1. Relin for examining his spen 

 mens and confirming his determination. 



