1920] Metcalf-Osborn: Insects of Between-Tide Zone 111 



The grass on which this species was found, the species 

 undetermined, is apparently restricted in its occurrence and 

 from the patches observed would seem to favor the little 

 depressions or pockets protected from the more violent action 

 of the waves but still sufficiently drained to become fairly dry 

 during the period of low tide. 



There is every reason to assume that the whole life history 

 is associated with this grass and although we have not had 

 opportunity to determine as to place of egg deposition or the 

 development of the young we are confident that all these stages 

 will be found associated with this plant when the necessary 

 observations can be made. 



As the species appears to be undescribed a technical descrip- 

 tion is appended. 



Deltocephalus marinus n. sp. 



A small, slender species, soiled yellowish white in color, with 

 the margin of vertex marked by two or three pairs of fuscous 

 spots. Length 2.25 mm. ; width across prothorax .6 mm. 



Vertex bluntly angulate, slightly convex, scarcely twice as long on 

 middle as between the eyes, front broad, evenly curved to base of 

 clypeus; pronotum narrower than the head, well produced in front 

 between the eyes, lateral edges rounded, without distinct angles, posterior 

 margin slightly sinuate; elytra extending beyond tip of abdomen, 

 venation distinct. 



Color: head yellowish white marked with dark fuscous as follows: 

 eyes, two oblique dashes between eyes and median line, sometimes a 

 pair of large triangular fuscous spots bordering anterior margin of 

 vertex with dots below near the eye as in balli, and seven pairs of heavy 

 arcs on front. Pronotum soiled whitish with six faint longitudinal 

 stripes; elytra soiled whitish, veins lighter with more or less fuscous 

 border; legs yellowish the femora crossed by two fuscous bands, one 

 near the middle, broad and another between the middle and the apex; 

 abdomen beneath blackish fuscous with pleurae and genitalia more 

 yellowish. 



Genitalia: Female last ventral segment short, about three times as 

 broad as long, posterior margin slightly concave; pygofers rather 

 slender and slightly exceeded by the ovipositor. Male last ventral 

 segment narrow with the apex rather deeply concave, valve brpadly 

 triangular, rounded at tip, plates long, two to two and one-half times 

 as long as basal width, gradually tapered to a sharp pointed, upturned 

 and black apex. 



Described from 13 males and 14 females collected on small 

 grass below level of high tide Wrightsville Beach, North Car- 



