March, '09! ENTOMOLOGICAL NEWS. 119 



Two little-known Aphids on Carex sp 



By C. P. GILLETTE. 



(Pi. vnr.) 

 * Brachycolus ballii Gill. 



In Canadian Entomologist for 1907, p. 67, the writer gave 

 a description of the apterous viviparous, and oviparous females 

 and eggs of this louse and its host plant, Carex nebraskensis. 



At that time the alate form, though much sought for, was 

 unknown to me. While spending a day at the home of Senator 

 J. H. Crowley, near Rock Ford, Colorado, June ist, 1907, 

 a single alate viviparous female was found upon a rank growth 

 of Carex along an irrigating ditch. Nearly every leaf was in- 

 fested by this louse in various stages of development, but not 

 another winged louse or pupa was seen. The louse has been 

 common upon Carex in the vicinity of Fort Collins all through 

 the summer and fall where both Mr. Bragg and myself have 

 kept a close watch for the winged form but without finding it. 

 so I am giving the following description and Fig. 5 of Plate 

 VII, from the single example which had the right wing injured 

 so as to obliterate most of the venation. I mention this fact 

 as the branching of the third sector of the wing drawn seems 

 as though it might be abnormal. 



ALATE VIVIPAROUS FEMALE. 



Head, thorax, antennae and legs black or blackish ; dorsum of 

 abdomen pale yellowish with a narrow transverse blackish dash upon 

 the dorsum of each segment ; each segment also having upon either 

 lateral margin a dark spot, and upon segment 6 the lateral spot 

 surrounds the cornicle; cornicles and cauda blackish, stigma of wing 

 rather long and narrow, dusky; anterior wing hyaline with third trans- 

 verse nervure thrice forked, which may be abnormal (the right wing 

 was ruined in the single specimen studied) ; hind wing with one 

 transverse vein only; cauda knobbed; anal plate bi-lobed ; cornicles 



*This species does not seem to me to fit any known genus well. It 

 differs from Buckton's characterization of Brachycolus by having a 

 longer 7th joint of the antenna and by having a knobbed, rather than 

 a pointed cauda. The latter difference is a rather serious one allying 

 it with the Callipterini. 



