Records of Bees. 547 



asrertaiiK'd to bi; a syiioiiyiii of Cheloslonia calif oruicu in, 

 Cressoii. 



Sphecodes pecosensis salicis^ siibsp. n. 



? . — Length about 9 mm. 



Similar to S. pecusensis, Ckll., with inner tooth on 

 mandibles and deep dorsal constriction between first and 

 second abdominal segments, but differing thus : area of 

 metathorax not defined, covered with very coarse vermiform 

 (not straight) rngre. Abdomen dusky chestnut-red, brighter 

 on first two segments. 



Mountains near Claremont, California, on Salix {Bake?- ; 

 Pomona College, 221). 



Perdita spharalceee ridens, var. n. 



S • — Head extremely large, quadrate, broader than thorax, 

 with the cheeks broadened and strongly projecting, obtusely 

 angled ; abdomen dull red with narrow yellow bands. 

 Runs exactly to P. sphceralcea in my tables, and while it 

 looks very distinct, it is only a large-headed variety, such 

 as occurs occasionally in other Panurgids. 



Mesilla, New Mexico, at flowers of Spharalcea lobata, 

 \ a.r. perpatlida, Ckll., Sept. 10 {Cockerell). 



Pei'dita platyura^s"^. n. 



$ . — Length about 4'5 mm. 



Robust, with very broad flat abdomen ; head and thorax 

 with thin but rather abundant white hair ; head dark blue, 

 shining, of ordinary form, facial quadrangle scpiarc ; man- 

 dibles sordid whitish, red at apex ; labrum sordid whitish, 

 shining, prominent ; cheeks dark ; clypeus and lateral face- 

 marks dull white, clypeus with the margins above broadly 

 black, 80 that the white area is conical ; lateral marks 

 triangular, reaching about to level of antennae, excavated 

 on inner side above ; thorax dark, blue-green, mesothorax 

 dullish, tubercles dark. Wings milky hyaline with colour- 

 less nervures, stigma pale yellow ; marginal cell squarely 

 truncate ; second s.m. long, receiving both recurrent 

 nervures. Legs dark brown, very hairy, tarsi whitish, 

 anterior tibise pale yellow in front. Abdomen above rather 

 light brown, with large dusky sublateral spots, apex pale 

 reddish, venter reddish brown. 



