I'HE CANADIAN ENTOMOLOGIST. 39o 



A very common species, and nearly all adults are getting wings now. 

 The pupae have very dark brown abdomens, and the thorax is daik green. 

 The shorter cornicles dull black colour, and shorter 6th and longer 7th 

 joints of the antenna are characters separating this species from Aphis 

 inedicaginis, with its shining black apterous females, and which infests a 

 large variety of plants. 



This was a very abundant louse upon the stems and leaves of Rumex 

 during the month of June and the early part of July, 1907. By the las.t 

 of July the enemies of this louse had so reduced its numbers that Mr. L. 

 C. Bragg, who was making constant field observations for me, was able 

 with difficulty to find specimens through the month of August, and then 

 they were found close to the ground. By the first of October they had 

 become quite abundant, but to the casual observer would be unnoticed, as 

 they remained close to, or even somewhat beneath the surface of the 

 ground. At this writing, Oct. 20, the males and oviparous females are 

 very abundant, as are iheir eggs, upon the bases of the leaves and dead 

 seed stalks. Winged females were abundant during June and July, but 

 have been entirely absent since about the last of September. 



So far as Mr. Bragg or I have been able to observe, this louse 

 confines its attacks to the genus Rumex. 



Drepanosiphuin Braggii, n. sp. 



I take pleasure in dedicating this interesting new species to Mr. L. 

 C. Bragg, who is a most careful and enthusiastic student of nature, and 

 who first discovered this species upon box elder at Fort Collins, in the 

 summer of iqc6. 



Alaie Viviparous Female. 



Described from specimens taken at Fort Collins, Oct. 18, '07. 



General colour of head, prothorax and abdomen pale greenish- 

 yellow ; of mesothorax pale yellowish-brown ; eyes bright red, cornicles 

 concolorous with the abdomen at base, rusty-brown in distal half, and 

 may be black at extreme tips ; antenna pale yellowish-brown, with distal 

 ends of joints 3, 4, 5 and all of joint 6 black ; tibia^ entirely dusky, tarsi 

 blackish, femora all concolorous with abdomen. Antenna very long, 

 filiform, a little more than twice the length of the body, 7th joint, if whole, 

 the longest. 



Length of body 3, wing 4.6, antenna 6.3 mm. Joints of antenna 

 about as follows : III 1.5, IV 1.4, V 1.2, VI .22, VII 1.8 mm. Third 

 joint with a single row of about 7 to 10 sensoria on the under side of the 



