Records of Bees. 447 



on front ; flagelhim lonfr^ dark, submoniliform ; legs black, 

 not metallic, tlic'ir hair partly black ami jiartly pale; tarsi 

 normal, but the last joint red and rather elongate. Wings 

 hyaline, a little stained along the veins. Abdomen subglobose, 

 hind margins of segments very narrowly reddish ; third and 

 following segments wi,th short black hair ; sixth with a small 

 notch; seventh bidentate ; first ventral normal ; third ventral 

 ivith a semicircle of long pale orange hairs in the median emar- 

 gination ; fourth broadly elevated in the middle, the long 

 margin of the elevation ciliate with black hairs. 



In the Florissant table runs to 0. faceta^ and it agrees 

 with certain E-ocky Mountain males which I have called 

 ficeta; but the xQiA faceia is a steel-blue insect allied to 

 O. chalyhta. In the Boulder County table it runs to 

 O. aprilinn, which is, however, a smaller species, with the 

 hair a different colour and the flagellum not submoniliform. 

 Disregarding the few black hairs at sides of vertex, it runs 

 to Wheeleri ixudci/aneonitens. O. TF/<ee/eri is easily separated 

 from it by the absence of the peculiar characters of the third 

 and fourth ventral segments, as well as the narrower form 

 and different colour of the abdomen ; O. cyaneonitens is 

 considerably larger, and also lacks the semicircle of orange 

 hairs on the under side of the abdomen. 



Hob. Florissant, Colorado (type-locality), at flowers of 

 Senecio tridenticulata, June 20 {S. A. liohwer^. Top of 

 Las Vegas Range, New Mexico, 11,000 ft., June 28 

 ( Cockerell). 



Osmta amala, sp. n."^ 



^ . — Length about 9 mm. 



Head and thorax very densely punctured, but glittering, 

 dark blue, giving Avay to green on clypeus and rnesothorax ; 

 abdomen broad-ovate, brilliant purple-blue, the hind margins 

 of the segments narrowly rufous ; legs black, without metallic 

 tints ; hair of head and thorax dull white, with no dark 

 intermixed on thorax above ; hair o£ cheeks black, and a few 

 black hairs on extreme sides of vertex; hair on pleura white, 

 but just under the wings, and posteriorly on sides of meta- 

 thorax, it is black; clypeus normal; antennje wholly dark, 

 flagellum very long, not at all crenulate or moniliform. 

 Wings hyaline; b. n. meeting t.-m. Hair of legs partly pale 

 and partly dark ; hind femora with scattered black liairs ; 

 hair on inner side of iiind basitarsus very dark ))urplish 

 fuscous. ISixth dorsal segment of abdomen entire, not at all 

 produced ; seventh bidentate, with a brush of black hair 

 beneath each tooth ; first ventral not emargiuate ; second 



■■ Amafa, a Malavnn word for blue. 



