242 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 
pen, und Kiiferzustande. Von H. Michels. Zeitschrift i'iir wisseus. Zoologic. Bd. 
xxxiv, p. G41-702. PI, 33-36. 1880. 
Packard. On the internal structure of the Brain of Lirnulus Polyphemus. By A. S. 
Packard, jr. American Naturalist, June, 1880, \>. 444-448. 
. The Eyes and Brain of Cermatia forceps. By A. S. Packard, jr. American 
Naturalist, August 1880, p. 602. 
. The Anatomy, Histology, and Embryology of Lirnulus Polyphemus. By A. 
S. Packard, jx. Anniversary Memoirs of the Boston Society of Natural History. 
Boston, 1880, pp. 1-45. PI. i-vii. 
Krieger. Ueher das Centralnervensystcm des Flusskrebses. Von K. R. Krieger, 
Zeitschrift fiir wissenschaft. Zoologic. Bd. xxxiii, Jau. 23, 1880, p. 527. Plates. 
CHAPTER XII. 
LOCUST RAVAGES IN CALIFORNIA. 
As the chronology of the history of the locusts in California has been 
given in our first report, we only add here the data obtained since that 
time and such as we deem of importance then omitted. 
Up to the present time the question as to whether Caloptenus spretua 
ever invades California remains an 
open one which we have been unable 
to answer decisively. 83 " That Oa lu- 
nula pellucida (Gldipoda atrox is a 
synonym) is often very destructive, 
is conclusively shown by the data 
here given, furnished by Mr. J. G. 
Lemmon, of Sierra Valley, California. 
But that this species is truly migra- 
tory, or migratory in the sense this 
term is usually understood when ap- 
plied to locusts, appears very doubt- 
ful ; in fact, as will be seen by refer- FlG - w.-camnuiapeiiurtda. 
ence to Mr. Lemmon's statement, there are strong reasons for believing 
it is not, which agrees with our opinion judging from the insect alone. 
As introductory to the data furnished by Mr. Lemmon we give here 
a description of this species and also the generic characters. 
Before presenting a description from the specimens now before us we 
will indicate briefly the position the genus occupies in the family, accord- 
ing to recent classification. 
By reference to pages 34 and 35 of our First Report the reader will 
observe that the subfamily Acridina', so far as represented in this coun- 
3311 It should be mentioned, however, that Mr. Packard, as the result of his journey 
through California, Western Washington Territory, and Oregon, has stated his belief 
that the Rocky Mountain locust (C. spretus) does not inhabit nor visit the Pacific 
Coast, nor pass west of the Sierra Nevada and Cascade Mountains. — [See first report, 
p. 455, and Appendix, p. 142. ] 
