](■»() THE CANADIAN ENTOMOLOGIST 



NEW ROCKY MOUNTAIN BEES, AND OTHER NOTES. 



BY T. I). A. COCKERELL, BOULDER, COLO. 



Bombus iridis phacelice, n. var. — $ • Hair of face black, with a 

 liitle i)ale intermixed ; yellovv hair of thorax in front dense, not at all 

 mixed with black ; yellow of sciitellum neither divided nor mixed 

 with black ; hair on inner side of basal joints of tarsi dark ; hair 

 on second and third abdominal segments entirely deep red (much less dense, 

 and not nearly so tiright as in B. ternarius), but second with a large bare 

 medi.ni triangle ; hair of fourth segment and sides of fifth yellow. 



Hab — Ward, Colorado; alt. 9,000 ft., at fiowers o{ Phacelia circinata, 

 July iS, 1905. (W. P. (1- T. D. A. Ckll.) This has the structure of B. 

 iridis, but the brightly-coloured abdomen gives it such a different aspect 

 that 1 at first took it for a new species. I am now convinced that B. 

 iridis belongs to the series of ^. ternarius, in which it is easily recogniz- 

 able by the red of abdomen being confined to segments 2 and 3, h^ir of 

 face mostly black, yellow of thorax anteriorly not mixed with black, and 

 pubescence on inner side of hind tarsi fuscous. No doubt bifarius and 

 ornatus are varieties of terjiariiis, but iridis appeals to be a ])erfectly 

 valid species. 



Osmia liypocrita^ n. sp. — ? . Black ; of the narrow, ])arallel-sided 

 type ; abdomen shining, scopa black ; front, vertex, thorax above, and 

 first two segments of abdomen, with much rather dull white hair ; pleura, 

 rest of abdomen, and legs, with black hair, not at all dense. Length 

 about (or hardly) 13 mm., width of abdomen about 3)^ mm. In all 

 resi)ects this is so like Monumet/ia argentifrons that, until I examined it 

 with a lens, I did not doubt that it belonged to that species. It is, never- 

 theless, undoubtedly distinct, and will be easily separated by the following 

 characters : Mandibles smaller, in the closed condition I see only two 

 teeth, and there do not seem to be others ; the upper and lower (or inner 

 and outer) mandibular cariniie are, at their ends, at least twice as close 

 together as those of /)/. arge/iti/rons ; clypeus with a strong, smooth and 

 shining, longitudinal median ridge ; anterior edge of clypeus somewhat 

 turned U)), and broadly and shallowly emarginate ; hair on clypeus and at 

 its sides white, but some short black hair near its anterior edge ; eyes 

 diverging above (in M. argentifrons they slightly converge above) ; hair on 

 lower i)art of cheeks white ; vertex smaller; parapsidal grooves strongly 

 converging anteriorly ; punctures of mesothorax denser and smaller ; the 

 wings offer nothing distinctive in colour or venation, except that the second 

 recurrent nervure is less distant from the end of the second submarginal 



May, 19*16 



