Dec, 1916.] Notes on Ceutorhynchus marginatus. 251 



(Plate I, fig. 3). There are thirty-four strong setae which support 

 the pupa within its cocoon. Fourteen of these are on the dorsal side, 

 three pairs along the middle, three setae on each of the posterior 

 angles, and one seta on each of the anterior angles of the prothorax. 

 On the head there are two pairs of setae; one pair on the middle of 

 the head directly forward and a single smaller seta on each side of 

 the head. The beak has two pairs of setae; one pair near the middle 

 and a pair near the base. In addition to these there are a pair of 

 setae on the outer angles of each pair of legs. The antennas appear 

 to be joined near the base of the beak but as a matter of fact 

 are joined near the tip, as in the adult, the long basal segment in 

 the pupa being inclosed in the pupal skin. The last ventral abdominal 

 segment bears a pair of chitinized hooks. Length 2.89 mm. Width, 

 1.97 mm. 



Adult. — The adult (technically described by Blatchley and Leng, 

 1916, p. 444) is a small beetle about three millimeters long, broadly 

 ovate with a distinct white patch at the base of the elytra. The 

 head, upper parts of the thorax, elytra and legs are dark, almost 

 black, and coarsely punctured, while the under side of the thorax 

 and abdomen are covered with whitish scales. The beak is long and 

 has a pair of elbowed antennas inserted on the lower half (Plate I, 



fig- 4)- 



The adults are not very active and are rarely seen. They are 

 shy and like to hide at the base of the plant. When the plant is 

 jarred they drop to the ground, feigning death, the beak and legs 

 drawn close to the body. They often remain on their backs for 

 several minutes without moving. 



There is but one generation a year and the species hibernate as 

 adults. All the larvae, under observation, formed their pupal cases 

 immediately on entering the ground and emerged in 26 to 33 days. 

 After the first two weeks of July no eggs or larvae could be found 

 out of doors. The beetles seem to have disappeared. All the beetles 

 which had been laying in captivity died off during the early part of 

 July. In the fall the beetles were found very abundant among the 

 pine needles at the base of pine trees. On November a large num- 

 ber were separated from the needles. Again on February i the 

 beetles were obtained by sifting the same kind of material. Trash 

 from the fields where the beetles were abundant during the summer 



