114 Annals Entomological Society of America [Vol. XIII, 



It is apparently identical with the form described from 

 Spartina patens and collected at Cold Spring Harbor in 1904.* 



While the species is very definitely adapted for the condi- 

 tions of the head with the parts of bloom and seed and none 

 could be secured by beating or sweeping the leaves or stems 

 there is of course an interesting question as to where the eggs 

 may be laid and whether these are liable to submergence from 

 occurring in parts that may at times be under water. The 

 Uniola is for the most part on the parts of the dunes fairly well 

 above high water mark but some of the plants closer to the 

 tide level may very likely be submerged during periods of 

 unusual high tide or severe storms. 



Megamelanus elongatus Ball. 



Taken only sparingly but on grass of the higher levels of the 

 tidal flats and where the submergence though shorter in duration 

 must be fairly complete. • 



Megamelus (Prokelesia) marginatus VanD. 



A specimen of this species was taken in connection with the 

 abundant Libumia detecta and very evidently fully adapted to 

 the same conditions of life. 



It has much the appearance of the Liburnia and may easily 

 be confused with that species especially for the macropterous 

 form. 



No details of life history have been recorded and we were 

 unable to carry on any studies that would give definite results 

 as to adaptations in the life history that might be credited to 

 the particular environment of the tidal fiats. However, it 

 seems fairly certain that the eggs must be laid in leaves or 

 stems of plants subject to much submergence as otherwise we 

 could hardly account for the abundance of the insects, especially 

 micropterous forms, on plants subject to complete submergence 

 at every period of high tide. 



Arndt (1914)t has discussed a number of insects living in the 

 between tide zone and among others gives an account of Megam- 

 elus (Prokelesia) marginatus VanDuzee which is evidently 

 adapted to much the same conditions as the Liburnia detecta 

 found at Wrightsville. 



* Ohio Naturalist, Vol. V, p. 375. 



tProc. Indiana Acad. Sci., 1914, pp. 323-336. 



