8o ENTOMOLOGICAL NEWS. [Feb., 'lO 



G. hirticollis. 



This is the characteristic species of the upper strand, where 

 it especially frequents the tidal depression facing the outer 

 line of the dunes. Here the sand is rather damp and of a 

 grayish hue, with which the colors of the beetle blend per- 

 fectly. 



Although common in its favorite haunts during the entire 

 summer and early fall C. hirticollis never seems to occur in 

 such swarms as C. dorsalis. It is also more locally distributed, 

 in some places it will be abundant, while in others, apparently 

 equally favorable, it will be rare or absent. 



This species is also found in smaller numbers on both the 

 lower beach and the more exposed dunes. At the inlets it 

 is found on the sandy shores of the thoroughfares. It also oc- 

 curs on the shores of Delaware Bay, where I have taken it near 

 ( ircen Creek. 



According to Davis (ENT. NEWS, xiv, '03, p. 272-273) those 

 individuals of C. hirticollis "which live on white sand are 

 marked with wide white bands, while those which live on mud- 

 deltas are heavily black for purposes of protection." My own 

 specimens were all collected from the situations mentioned be- 

 fore and, while some show clear white markings, others have 

 the markings brownish, in some cases so dark as to be seen 

 only by careful examination. So far I have never seen any 

 correlation between the intensity of the color markings and 

 the colors of the surroundings, the differently tinted individ- 

 uals being found indiscriminately and in about equal numbers 

 in the same places. For example, of eight specimens taken 

 on August 26, 1909, on the clear white dunes at Peermont not 

 one showed the clear white bands and in three of them the 

 bands were moderately dark. No specimens were taken in- 

 land. 



G. marginata. 



This form is characteristic of the bare sandy or mud flats on 

 the seaward borders of the maritime marshes. Its color is in 

 close harmony with the dark gray tints of such places. Of all 

 the species I have met it is the most difficult to detect. It is 



