FIELD AND FOREST. 55 



deep cut on North Capitol Street, also on Fourteenth Street and on 

 the line of the Baltimore and Ohio R. R. three or four miles from the 

 city. 



Dr. Gale also mentioned the existence of extensive submerged forests 

 on the coast of New Jersey, in the vicinity of Staten Island, sustaining 

 these views. 



Prof. Seaman spoke of the great quantity of trunks of trees, of larger 

 size, scattered through some of the New Jersey coast swamps. This 

 brought up the question of elevation aud subsidence of the Atlantic 

 coast, as going on now, and within a recent period. 



FIELD RECORD. 



Sentiment among Insects. — Some observations made a few months 

 since on the familiar Canthon Icevis (Tumble-bug) of the Middle States, 

 proving interesting to a few fellow-students to whom they were related, 

 are here presented. It will be seen in pairs much more frequently than 

 alone, and each pair concerning themselves about the safety of one ball, 

 instead of obstructing each other as is represented in the title page of 

 Say's American Entomology. Very generally, careful observation re- 

 veals the male, distinguished by its smaller size and other minute pecu- 

 liarities, resting or clinging to the ball, and endeavoring to preserve 

 its position on the upper side thereof, without aiding the female in 

 propelling it over the surface. So far as the human judgment is avail- 

 able, the male only assists by changing the centre of gravity of the 

 mass of which it forms a part. Not unfrequently however the ball is 

 rolled completely over him, by a hasty push of his partner, and the 

 favorable nature of the ground. 



If the observer carefully seizes the male and quickly removes it to the 

 collecting vial without jarring the ball, some seconds will elapse before 

 the "widowed survivor" realizes his absence, she then ceases pro- 

 pelling the ball in the direction previously taken ; mounts it, peers 

 under it, and on all sides of it ; gives it another fitful push or two, 

 aod then re-examines it closely with eye and antenna, then in the ma- 

 jority of cases deserts it entirely, on several occasions moving off a 



