Published online by Cambridge University Press: 31 May 2012
The material for this study was collected by Mr. H. O. Woodworth and myself during the spring and early summer of 1898. At Berkeley the collecting was carried on in a systematic manner, so that the number of each species taken gives a fair representation of their relative abundance. S. albicans and S. Edwardsii are the only species heretofore recorded from California. The specis may be readily recognized by means of the following synopsis:
Abdomen with distinct, white bands.