284 THE CANADIAN ENTOMOLOGIST. 



Habitat : Berkeley, Cal., Feb. 22 to May i ; numerous specimens. 

 Santa Catalina Island (H. O. Woodworth), June 21 ; one specimen. Dur- 

 ing the earlier part of the season several specimens were collected upon 

 the white flowers of Cytisus poliferus in the botanic garden. About the 

 middle of April quite a number of females were observed collecting pollen 

 from oak blossoms. A i^w males were collected upon Ranunculus 

 californicus. On April 22, 1899, several nests were examined. They 

 are, in general, much like those of many other bees of solitary habits, 

 being grouped together in quite large numbers, and each one consisting of a 

 single burrrow extending about a foot into the hard earth. The cell at 

 the end is about 10 millimetres wide by 16 in length, lined with a thin, hard 

 layer of wax and filled with a mixture of pollen and honey. A large 

 number of the bees had taken possession of an old squirrel hole, from the 

 inside of which, at a depth of about a foot, their burrows were found ex- 

 tending off in all directions, while the outside burrows extended nearly 

 straight downward. The traces of a number of old burrows would indicate 

 that the same spot had been visited from year to year. Only a few of the 

 nests at this date were complete, and no larvae were found. 



3. Habropoda miserabitis, Cress., ^ . 



? . — Differs from male in being a little larger, having the face black, 

 posterior legs clothed with long dense pubescence slightly tinged with 

 yellowish, that on apical portion of the middle tibite above fuscous, at the 

 tips of the posterior metatarsi a bunch of black hair. Both males and 

 females have the pubescence on the under side of the legs more or less 

 fuscous. The males before me have the " large sub-trefoil mark on the 

 clypeus " extending somewhat on the region above. 



San Francisco, Cal.j April. Twenty speciniens, collected chiefly 

 upon Phacelia californica. 



DiDASiA, Patton. 

 The bees of this genus fly somewhat later in the season. None of 

 the species are common in Berkeley, but D. enavata is very abundant in 

 Southern California during the early part of summer. 

 Abdomen with black ])ubescence, except en segments \-2 ; not 



banded nerea. 



Abdomen with pale pubescence ; white bands or fascia on apical margins 

 of the segments.* 



* D. alboresta, Prov. , seems to differ from enavata and cinerea chiefly in size, being 

 only 8 mm. in length. The species is unknown to me. 



