130 THE CANADIAN ENTOMOLOGIST. 



agrees with the female in having a strong constriction at the base of the 

 second abdominal segment, and I feci assured that it is correctly assigned 

 to it ; but it has all the characters of Robertson's genus Proteraner, while 

 the female will by no means agree with Robertson's definition of ? 

 Proteraner. It appears that Proteraner was defined on characters which, 

 in part at least, are only of specific value ; either it must be redefined or 

 else dropped. I incline to the opinion that it will prove a valid genus> 

 but further investigation is required. 



The Florissant male now assigned to 6". pecosensis is so close to 

 Proteraner r/iois, Ckll., that I formerly identified a specimen as that 

 species. On examining the types of P. r/iois, I find a striking character 

 not mentioned in the original description ; the middle femora are much 

 flattened and sharply keeled beneath, with a conspicuous angle near the 

 end of the basal third. In the Florissant $ S. peeosensis all this is merely 

 suggested by a slight flattening, and there is no definite angle. 



Osmia f/ietitia, n. sp. 

 o' . Length, 10^ mm.; head blackish, with yellow-green tints ; 

 thorax very densely punctured, the mesothorax and scutellum yellow-green, 

 the pleura and metathorax blue-green ; abdomen with the first segment, 

 especially on the hind margin, yellow-green ; the other segments very dark 

 purplish, with the hind margins shining dark bluish-green ; venter dark 

 blue; legs black, without metallic tints; face with very abundant long 

 white hair ; vertex and thorax above with pale ochraceous hair, not mixed 

 with black, except at sides of vertex ; cheeks with long black hair, 

 ochraceous above ; pleura with light hair, but a little black in front and 

 behind ; lower two-thirds of sides of metathorax with black hair, the upper 

 third with pale ; first three segments of abdomen with glittering pale hair, 

 the rest with black, and some black at apex of third, and intermixed at 

 sides of second and third ; legs with black hair, but anterior ones with pale 

 hair behind, and middle femora with some pale hairs beneath ; tegulae 

 shining black ; wings hyaline, very slightly dusky, no strong cloud in the 

 marginal cell ; edge of clypsus a little wavy, but essentially normal ; 

 antennae ordinary, long, entirely black, third joint shorter than fourth ; 

 middle tibial spine very sharp, bent sideways ; middle basitarsus normal, 

 but the joints 2 to 4 (especially 2 and 3) swollen and broadened, 2 greatly 

 swollen one one side ; sixth abdominal segment entire, seventh bidentate ; 

 second ventral perfectly normal at apex ; third deeply emarginate, the 

 emargination fringed with orange hair ; fourth broadly truncate ; posterior 

 spur of hind tibia about one-fourth longer than anterior, 



