280 
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[Vol. 13 
suture, semioval, with one seta. Presternum wanting; eusternum unpaired, sub- 
triangular, with posterior apex in middle line of body, two setae on each side; para- 
sternum or coxal lobe paired, triangular, with anterior margin oblique, inner angle 
pointed and meeting the corresponding angle of parasternum of the opposite side of 
body, one seta; sternellum wanting, possibly fused with poststernellum; post- 
sternellum transversal, bandshaped, glabrous, functioning as articulating skin. Eighth 
abdominal segment somewhat smaller than the preceding typical abdominal seg¬ 
ments, with areas less distinct, arrangement and number of setae typical. Ninth 
abdominal segment half as large as eighth, areas not developed, with two large and 
two small dorsal setae and one large ventral seta. Tenth abdominal segment small, 
wart-shaped, with terminal round anus, two small setae. Spiracles before, small; 
thoracic spiracle pleural, placed right below the lower margin of prothoracic tergal 
region, about twice as large as the following seven abdominal spiracles, its finger- 
shaped air tubes directed upwards; all abdominal spiracles with air tubes directed 
backwards, eighth abdominal spiracle as large as the thoracic and placed slightly 
more dorsal than the other abdominal spiracles. Size; about 9 mm. Color; whitish 
with light brown chitinous parts. 
Bibliography 
1797. Herbst, J. F. W., Kafer III. Original description. 
1891. Bruner, L., Insect Life, v. 3, p. 230. 
1893. Riley, C. V., Div. Ent. Bui. 31, o. s. p. 45. 
1900. Forbes and Hart, Ill. A. E. S. Bui. 60, p. 493. * 
1905. Hunter and Hinds, U. S. Bur. Ent. Bui. 51, p. 67. 
1907. Pierce, W. D., Ann. Rept. Neb. St. Bd. Agri. for 1906-7, p. 283. 
1910. Smith, J. B., Insects of N. J., p. 395. 
1916. Blatchley and Leng, Rhyncophora of N. A., p. 383-4. 
Mr. W. D. Pierce: I think Mr. Ainslie is to be greatly compli¬ 
mented on this paper. Biologists have been puzzled many years to 
know how these insects lived. We have had our suspicions but no 
one has been able to work them up. I do not think the common name 
that has been given this species is sufficiently definite because there 
are other beetles that breed in cornstalks. It is interesting to know 
that this particular species extends throughout our Southern States 
and Central America, and probably South America. 
Vice-President E. C. Cotton: The next paper is “Notes on the 
Habits of Calendra pertinax Olivier / 1 by A. F. Satterthwait. 
NOTES ON THE HABITS OF CALENDRA PERTINAX 
OLIVIER 1 
By A. F. Satterthwait, Scientific Assistant, U. S. Bureau of Entomology 
One of our common and most widely distributed billbugs, Calendra 2 
pertinax Oliv. (PL 5, fig. 2), breeding normally in the common cat-tail 
1 Published by permission of the Secretary of Agriculture. 
2 Calendra Clairville and Schellenberg, 1798, Ent. Helv., p. 62, takes priority over 
Sphenophorus Schonherr, 1838, Gen. et Sp. Cure., vol. 4, p. 874, according to Dr. W. 
D. Pierce, in Proc. Ent. Soc. Wash., vol. 21, no. 2, Feb., 1919, p. 26. 
