266 ENTOMOLOGICAL NEWS [xxxii. '21 



Thus, Blatchley (loc. cit.) states that in northern Indiana he 

 found volantum "most abundantly ... on the leaves and 

 stems of a ... knot-weed, Pol\gonum amphibiiim L.. 

 which grew luxuriantly in the shallow waters about the margins 

 of the larger ponds and lakes" where it was noted as associated 

 with Orchclimum uic/riprs and Conocephalus attcnuatits. The 

 nearest approximation to a habitat of this kind that the section 

 of New Jersey in which volantum was found affords are the 

 extensive marshes which are formed by the tidal mud-flats 

 bordering the Delaware River and its tributaries. It was in 

 this type of marsh, as previously mentioned, that my first speci- 

 men of O. volantum was taken, and it may be added that of the 

 two "grasshoppers" mentioned by Blatchley as associated with 

 volantum in Indiana, one, Conocephalus attcnuatus, has never 

 been taken in New Jersey in any other environment, while the 

 other form, O. nigripes, although unknown east of the Appala- 

 chians, is represented in New Jersey by its nearest ally, 0. 

 pulchellum, which, according to my observations, also finds in 

 these tidal marshes conditions most congenial to it, though, 

 unlike C. attcnuatus, it was found in smaller numbers in other 

 stations. The plant, Polygonum amphibiiim, mentioned by 

 Blatchley as the one on which O. volantum occurs most abund- 



j 



antly in Indiana, apparently does not occur in southern New 

 Jersey as no mention of it is made by Stone, 3 although, accord- 

 ing to the latter, a closely related species, P. cmersitm Michx. 

 extends south in the Delaware Valley for some distance below 

 Camden. but appears to be a rather scarce and unimportant 

 constituent of the flora. A more distantly related form, P. 

 a ri folium L. 4 is, however, one of the most abundant and 

 characteristic components of the flora in parts of the New 

 Jersey tidal marshes. 



The occurrence of my second specimen of 0. volantum in a 

 relatively dry situation can readily be accounted for by suppos- 

 ing that it had wandered there from one of the adjoining tidal 

 marshes of the Delaware River. It is a not uncommon occur- 

 rence for adult individuals of species belonging to this genus, 

 especially as regards the males, to wander away from their 

 usual habitats and to take up their abode in stations of which 



