20 CALIFORNIA ACADEMY OF SCIENCES. 



x\nthidium californicum Cress. San Esteban, L. 

 Cal. {Haines). April. Differs from the typical form in 

 having the pubescence on thorax pale and by lacking the 

 yellow markings on legs. 



LiTHURGUS OBLONGUS n. Sp. 



$ . — Labrum about as long as the mandibles, broadest 

 basally, coarsely and sparsely punctured, and just before 

 the apex bears a very strong, transverse ridge (in shape 

 the labrum is somewhat oblong) ; mandibles with coarse 

 punctures, much contracted on inner side at about the 

 middle, the apex tridentate ; clypeus produced into a 

 broad flap-like projection, the fore margin of which is 

 broadly emarginate, its upper surface very coarsely punc- 

 tured and strongly furrowed down the middle; between 

 insertion of antennee there is a strong convexity; front 

 and vertex strongly and evenly punctured, the front more 

 strongly so; ocelli forming a curve, placed in pits; on the 

 vertex extending back a short distance, and dividing the 

 hind ocelli there is a strong impression; dorsulum and 

 scutellum punctured about like the front; first abdominal 

 segment, the basal portion of segments 2-5, and the 

 sixth entirely, above, with the punctuation liner than on 

 the remainder of the abdomen. Black, the tegula? 

 yellowish-testaceous; sides of face, front behind the an- 

 tennee, cheeks, thorax and abdomen more or less with 

 white pubescence, dorsal abdominal segments 1-5 with a 

 short fringe of white pubescence ; ventral scopa whitish ; 

 pubescence on inner side of tarsi brownish ; wings h3^a- 

 line, nervures and stigma black ; mandibles fringed with 

 golden-brown hair. Length, 13 mm. 



San Ignacio, L. Cal. [Ha/iies). April. 



Megachile MEXicANA Cress. Six females. San Jose 

 del Cabo, L. Cal. {Jiisen). 



