110 Annals Entomological Society of America [Vol. XIII, 



Deltocephalus littoralis Ball. 



This species described by Ball in 1905 from specimens col- 

 lected by VanDuzee at Anglesea, N. J., and since reported 

 from several localities along the Atlantic coast was taken in 

 considerable abundance at Southport, July 28th (1919) and 

 under conditions which showed its adaptation to the between 

 tide habitat very satisfactorily. The grass upon which it 

 occurred was common in certain parts of the tidal flat and where 

 the sugmergence under high tide was very evident although 

 there was not the indication of such complete submergence as 

 where the Liburnia detecta was most common. Adults were 

 abundant and also a nymph which is certainly the young of this 

 species as it was the only nymph of a jassid taken in this associa- 

 tion and possesses the distinctive characters of the species so 

 evidently that even without rearing we feel assured of its rela- 

 tion to the adult. These nymphs are quite uniformly greenish 

 yellow without marking except that the eyes appear conspic- 

 uously black and the frontal arcs are fairly indicated in whitish 

 on a pale smoky brown background. The length is 2^ mm. 

 It seems obvious that the nymphs and probably the adults also, 

 which showed little tendency to flight, are able to survive con- 

 siderable periods of submergence and that the species is dis- 

 tinctly restricted to the tidal zone or the grasses occurring 

 there. No record of the occurrence of the species at points 

 incompatible with this view have been made so far as we are 

 aware. 



Deltocephalus marinus n. sp. 



Another species perhaps even more perfectly adapted for the 

 submergence was taken at Wrightsville Beach, July 27th (1919). 



This is a minute species found on a very fine-leaved grass 

 that occurs in extensive mats on areas that are completely 

 submerged at high tide and as the grass is very short it would 

 seem certain that the insect must undergo complete sub- 

 mergence for considerable periods. It corresponds very closely 

 in habitat to the D. minuta VanDuzee which abounds in the 

 tidal flat matted grasses of the Pacific coast, especially in the 

 vicinity of Long Beach, California. Our species is much darker 

 above bearing some resemblance to a small compactus or to a 

 minute and dark colored nigrifrons Forbes (balli VanD.). 



