Records of Dees. 7G5 



clypeus normal, lower margiu black. Auteniue black ; 

 tegula3 purple. Wings sti'ougly dusky ; b. ii. going just 

 basad of t.-m. ; hind spurs curved at end. 



Hab. Claremont, California {Baker) ; 1 ? . 



Looks like O. cobalilna, Cresson, but is broader and 

 shorter, with the dorsal bair of thorax all black. Compared 

 with 0. sancta-ros(P, Ckll., it is much broader, more thick-set, 

 and the rich purple colour is quite different from the deep 

 blue oi sanctce-rosee. 



Osmia platyura, sp. n. 



<$ . — Length about 10 mm. 



Narrow, with parallel-sided abdomen ; head, thorax, and 

 legs brilliant emerald-green, or the mesothorax suffused with 

 blue ; abdomen brilliant green or (var. a) brilliant blue- 

 purple, more or less suffused with green ; pubescence white 

 throughout, except on inner side of tarsi, where it is yellowish. 

 Head round seen from in front, eyes very large, face 

 narrow ; mandibles broadly f- reen at base ; scape largely 

 green; flagellum long, ferruginous beneath; mesothorax 

 and scutellum densely punc cured; tegulae shining green. 

 Wings dusky brown ; b. n. meeting t.-m. ; first r. n. joining 

 second s.m. near base ; marj<,inal cell long. Tarsi normal ; 

 spurs dark. Abdomen closily punctured, with very little 

 hair above, but the segments beneath conspicuously fringed 

 with white hair; sixth dorf^al segment simple in middle, but 

 toothed at each extreme side ; seventh very large and flat, 

 forming a broadly rounded apical plate ; second ventral more 

 or less keeled, the keel prominent at apex, where it ends in a 

 point ; third ventral broadly truncate, the truncate edge 

 more or less concave. 

 ? . — Length 8-9 mm. 



Like the male, but shorter ; the green form bluer green, 

 the purple (which may include head and thorax) apparently 

 as common as the green ; head oblong, the face much longer 

 than broad, occipital region strongly developed ; mandibles 

 greenish at base, with two strong teeth, and a broad, feebly 

 developed, binodulose inner one ; scape green, flagellum 

 dark, obscure reddish beneath ; pubescence scanty, fuscous ; 

 ventral scopa black ; tegulse about two-thirds green ; hair on 

 inner side of tarsi dark chocolate. 



Hab. Type ((J) from mountains near Claremont, Cali- 

 fornia {Baker). Other males from Claremont, California 

 {Baker), and Ormsby County, Nevada (Baker). Seven 

 females from Ormsby County, Nevada {Baker). 

 Ann. & Mag. N. Hisst. Ser. 8. Vol. viii. 51 



