208 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



diagram of the push-up and burrow containing the adults. However, 

 the larvae eluded him. 



Two miles north of Southern Pines I found subtropicus in moderate 

 numbers burrowing in an old sandy road (pi. 17, fig. 1). The road 

 ran along near the top of a high sand ridge which was largely covered 

 with grasses and weeds. The Eucanthus did not utilize the shade 

 afforded by the few scattered turkey oaks and longleaf pines present 

 in the area, but burrowed in the exposed bare sandy areas. Here the 

 burrows could be easily located by the characteristic push-ups of 

 "ropey" piles of sand almost 1 inch high and about 2 inches in diameter. 



This locality at Southern Pines was visited rather frequently during 

 1951 and 1952. In July 1952 pairs of Eucanthus were found in 3 of 12 

 burrows dug. The vertical burrows averaged about 20 inches deep, 

 the deepest one measured being 30 inches. On July 24, 1951, three 

 burrows, separated by only a few inches, were excavated by using a 

 pos thole digger and sifting the sand as it was brought to the surface. 

 A female was sifted out of the sand, brought up from a depth of 20 

 inches. In the sand from a depth of 24 inches, a larva was found 

 during the sifting. Because of the manner in which it was collected 

 little could be ascertained concerning the food of the larva or the 

 type of cell that it occupied. A quantity of black humus, similar to 

 that used by Bolhocerosoma and Bolboceras, was present in the sand 

 brought up. Some of this material was placed in a metal salve box 

 with the live larva for several days, but it could not be determined 

 whether the larva used the humus for food. The larva, a third instar, 

 was preserved on July 29. 



After the discovery of the larva on July 24, a number of other 

 burrows were dug the same day, but with rather unsatisfactory results. 

 One burrow, 22 inches deep, yielded a very callow female, but no cell 

 or food material was found. Further digging produced only adults. 



During August 1951 considerable adult activity was noted, but no 

 additional larvae were found. Two burrows dug at Southern Pines 

 on August 18 were shallow, being only 12 and 14 inches deep. Nu- 

 merous other fresh burrows were seen the same day. During the 

 remainder of August and in early September all the burrows dug were 

 shallow. After Sept. 8 a number of these burrows were marked with 

 stakes and left undisturbed. 



When the area was next visited, on Nov. 9, 1951, there was no sign 

 of fresh surface activity. Two of the marked burrows were carefully 

 investigated. The burrows, 12 and 14 inches deep, each contained a 

 pair of subtropicus, the male slightly above the female in the burrow. 

 The burrow formed a perfectly straight vertical tube ending without 

 any indication of a food supply. 



