300 THE CANADIAN ENTOMOLOGIST. 



or ivvo stalkings, it flew when rising, apparently from clumsiness, towards 

 me instead of away, and thus ended its career. The specimen I took on 

 the prairie I observed settle on a flower-head — of what species I know 

 not — a habit I have never yet observed in either /t^tt a, Alberta or 

 Varuna. The $ $ agree fairly well with my Californica, except that 

 both primaries and secondaries are broader and more rounded, the sex 

 marks absent, and the primaries have two ocelli, rarely a trace of a third, 

 whereas my Califoniica have only one; and the ground colour of the 

 under side of secondaries is paler, and the band more contrasting. My 

 only explanation of the fact that I have not met with it here before this 

 year, is that it must be very erratic in appearance, as so conspicuous a 

 butterfly is not easily overlooked. I should be glad to hear something 

 about it from those who have taken it at Nepigon. 



A NEW PLANT LOUSE ON TOBACCO. 



BY THEODORe PERGANDE, WASHINGTON, D. C. 



Dr. L. O. Howard, who is preparing a general article on the subject 

 of insects affecting tobacco, for the Year Book of the U. S. Department of 

 Agriculture for 189S, has called my attention to a plant louse feeding 

 upon tobacco plants grown on the grounds of the Department, which he 

 wishes to mention specifically in his article, and since it is a new species, 

 at his request, I submit for publication the following description. 



I had been familiar with this undescribed species since 1897, and 

 had found it on the grounds of the Department of Agriculture in smaller 

 colonies on Rumex crispus, Leucanthcmiim vulgare, Forsythia viridis- 

 sima, and also on the leaves of the apple, pear, and egg-plant. Speci- 

 mens have also been received from Mt. Holly, Md., where they were 

 reported to feed in immense numbers on the tomato plant. 



Nectarophora 'I'abaci, new species. 



Winged Viviparous Female. — Length of body, 2.8 mm. to 3 mm.; 

 expanse of wings, about 8 mm.; length of antennae, 3 to 4 mm. Colour 

 yellowish-green and faintly pruinous, with the median line and lateral 

 margins of the abdomen more or less distinctly darker. Head, thoracic 

 lobes and sternal plate light brownish and polished ; the anterior angle 

 of the median lobe and posterior angle of the scutellum frequently black. 

 Eyes brown ; ocelli colourless, margined at inner side with black. 

 Antennae black, reaching considerably beyond the tip of the tail, the two 

 basal joints pale, dusky or with a greenish tinge, extreme base of third 



