.36 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. 



linear, 1-1. 5cm long. 6-8-fiowered. ; fertile scales oblong, 3mm. 

 long, obtuse, stramineous, the midvein green, folded, but at ma- 

 turity only concave ; achenes oblong 1-1. 25mm. long, 1mm. thick, 

 very obtusely 3-angled, the obtuse apex mucronulate. 



Growing in wet sand along streams ; probably common in 

 the cismontane region, below 1,000 feet altitude, but my only 

 specimens are of my own collecting at San Bernardino, where 

 it is abundant, and at Elsinore Lake. Dr. Britton has obliged 

 me with a part of Norton's type specimen, 1248 B. F. Bush, 

 from San Antonio. Texas. The spikelets are 2.5cm. long, but 

 otherwise the plants do not differ from my own. Immature 

 achenes are acutely 3-angied. and acute at both ends, but when 

 fully mature they are as described. 



^ Plate IV. From a plantcoUected at Elsinore Lake. X ^ -a. Achene 

 X 15 -b. Scale X 8. 



The Bees of Southeri\ California. III. 



BY T. D. A. COCKERELS. 



The following table is intended to separate the males of the 

 common tj^e of Anthidium represented by A. maculosum, mor- 

 moniim, montivagum, cognatum, &c., in various parts of the 

 United States. In addition to the species of Southern Cali- 

 fornia, I have included some others for comparison, two (from 

 Pecos, Xew Mexico) being new. There are also included some 

 species of a type not yet found in our region, one of them (tolte- 

 cum) being a Dianthidium. I have a residue of females from 

 Southern California which I have not cared to describe, as it 

 seems best to describe the species, so far as possible, 

 from the males, which possess the strongest characters. 

 No doubt further investigation will show that some 

 of the undescribed females belong with described 

 males, and when this is not the case, the males may 

 be discovered, permitting a more exact definition of 

 the characters of the species. It is to be understood that 

 all the new forms are black bees ornamented with yellow, the 

 abdomen having notched or divided bands, the notches always 

 anterior except on the first segment, where they are posterior. 



Anthidium; Males. 

 Last abdominal segment deeply notched, without a 



median projection 1 



Last abdominal segment, with a median projection 2 



1. ^largin of sixth segment sinuate (^lexico). .toltecum, Cress 

 ]\[argin of sixth segment with a strong median tooth, 

 and also lateral teeth (Europe) oblongatum, Latr. 



