BEES OF ALBERTA. V

Extract

Male (type) resembles H. ziziae (Rob.), to which it runs in my table and that of Metz (but in Lovell's table to modestus), differing however as follows: lateral face marks obliquely truncate above, the highest point next to orbit; flagellum considerably longer, pale dusky reddish (instead of bright ferruginous) beneath; tegulae entirely black; base of wings not pale; thorax more robust, light marks on collar separated by an interval greater than the length of one; wings larger, grey, with the stigma and nervures very dark; abdomen shining pure black (compared with an Illinois specimen from Robertson.).