I2O ENTOMOLOGICAL NEWS [Mar., 'lO 



New Bees of the Genus Osmia from California. 



BY T. D. A. COCKERELL. 



Osmia gabrielis sp. nov. 



?. Length about 13!!- mm., width of the rather long and nearly paral- 

 lel-sided abdomen about 4 mm.; color a fine dark indigo blue, brilliant 

 on the abdomen, suffused with purplish on the face, and with greenish 

 on the anterior part of the mesothorax ; pubescnce all black, except on 

 inner side of anterior tarsi, where it has a coppery tint ; in some lights 

 there is an appearance of pale hair here and there, owing to reflection 

 from the surface of the coarse black bristles; head and thorax' very 

 densely punctured, the punctures on the mesoththorax conspicuously 

 finer than those on the vertex ; head rather large, the cheeks broad ; 

 mandibles with the two apical teeth well developed, but the others nearly 

 obsolete ; clypeus simple, its lower margin black ; antennae black ; tegulse 

 black; wings fuliginous, broadly more or less hyaline along the veins, 

 especially the outer ones ; first r. n. entering, second s. m. nearly twice 

 as far from base as second from apex ; legs black, the femora strongly 

 tinged with blue; second abdominal segment purplish basally. 



A very distinct and beautiful species, having the general 

 form and appearance of 0. armaticeps Cresson, but without the 

 cephalic peculiarities of that insect. 



Hab. San Gabriel Mountains, California, alt. 3000 ft., June 

 16, 1909 (F. Grinnell, Jr.*). At the same time and place, Mr. 

 Grinnell took 0. quadriceps Cresson. 



Osmia grinnelli sp. nov. 



5 . Length about 10 mm., rather robust, with a short abdomen ; head 

 and thorax black, with feeble metallic tints, strongest at sides of face, 

 where the greenish contrasts with the black of the clypeus; abdomen 

 dark bluish, the first two segments partly brassy ; hair of head and 

 thorax inconspicuous, black mixed with shining white; a tuft of white 

 hair behind the wings, but that 011 sides of metathorax and on pleura 

 black; hair of abdomen black, even on first segment, hut some white 

 hairs forming a little tuft at sides of first segment near hind margin ; legs 

 black, with black hair, that on inner side of anterior tarsi copper-rid: 

 tegulae dark; wings hyaline, more or less stained along the nervures, 

 b. n. exactly meeting t. m. ; second s. m. low, receiving first r. n. only 

 a little more remote from base than second from apex; antennae black; 

 mandibles with only the two apical teeth well developed, these far 

 apart; clypeus with very large punctures, smaller and extremely dense 

 toward lower margin, next to which is a median broad shining pit or 

 depression. 



