THE CANADIAN ENTOMOLOGIST. 171 



(5.) On Eriogotium (a tall species with greenish-yellow flowers), 

 July 29, a few only. Winged $: Shining very dark plum colour; 

 abdomen same colour as head and thorax ; legs black, basal half or less 

 of femora, and coxfe, pale ochreous ; nectaries black ; cauda and stigma 

 ochreous yellow ; antennas black ; wings strongly iridescent. Young 

 pruinose, with olive-slate legs, antennae and nectaries. The nectaries are 

 obviously shorter than in the Potentilla form, and are held erect. 

 Apterous $: 2j/^ mm. long. Measurements in /x : nectaries 810; 

 antennal joints, (i.) 150, (2.) 100, (3.) 920, (4.) 770, (5.) 650, (6a.) 185, 

 (6b.) 680. 



(6.) On Ligiisticum (species with yellow flowers), July 29 ; not 

 many. Winged ? : Dark brown ; nectaries black ; legs black, basal half 

 of femora, coxae and basal half of tibise more or less, yellowish. Measure- 

 ments in \i: nectaries 840; antennal joints, (i.) prox. 150, (2.) 100, 

 (3.) 880, (4.) 730, (5.) 710, (6a.) 200, (6b.) 1220. The Ligtistiatm grew 

 mixed with the Potentilla next mentioned. 



(7.) On Potentilla (apparently P. pulcherrima), July 29, first found 

 by my wife ; very abundant. Dark reddish-gray, winged form with the 

 head and thorax more decidedly red, contrasting with the darker 

 abdomen. Half-grown more or less pruinose, with legs, antenna; and 

 nectaries dark olive. In the winged form these parts are black or 

 blackish, with the basal two-thirds of femora light yellowish. Stigma 

 light yellowish. Nectaries over twice length of cauda, which is pink. 

 Measurements of winged ? in /x : nectaries 990 ; antennal joints, (i.) prox. 

 150, (2.) 100, (3.) 9S0, (4.) 950. 



The specimens on the Potentilla have the nectaries a trifle shorter 

 than those on Frasera and Zygade?nis, but otherwise appear just the 

 same. Curiously, however, the Potentilla form when disturbed jerks to 

 and fro, but will not drop to the ground ; while those on Frasera and 

 Zygadenus do not jerk nearly so readily, neither do they fall. This 

 difference in the reaction of the creature to irritation was repeatedly 

 observed, and suggested that the species were different, but I am quite 

 unable to find satisfactory morphological characters to separate them. 

 Monell has remarked that N. sonchella always drops to the ground when 

 disturbed. 

 Nectarophora, spp. 



Other species of Nectarophora were taken at Beulah on Sophia 

 incisa, Geum, Gnaphalijun deairrens, Phacelia circinata, Erigeron and 

 Populus atigustifolia, but I did not secure the winged females and so 

 have deferred their description. 



