VOLUME SEVEN NUMBER FOUR 



JOURNAL 



OF 



ENTOMOLOGY 



AND "^ 



ZOOLOGY % 



DECEMBER, 1915 "^ 



PUBLISHED QUARTERLY BY C\ 



POMONA COLLEGE DEPARTMENT 0/ ZOOLOGY ^ 



CLAREMONT, CALIFORNIA, U. S. A. "^ 



CONTENTS 3. 



Three Common Spiders of Lacuna — Margaret L. Moles - - - - 209 



The Early Development of Ligyda With Reference to the 



Nervous System — WilUamA. Hilton 211 



The Nudibranch-Genus Triopha in California — 



T. D. A. Cockerell 228 



New California Bees — T. D. A. Cockerell 230 



On Two New Polynoids From Lacuna — IV. F. Hamilton - - - 234 



The Brown Ctenucha — E. O. Essig 241 



Entered at Claremont, Cal., Post-Offlce Oct. 1, 1910, as second-class matter, under Act of Congress of 



March 8. 1878 



