APHID PESTS OF MAINE, II. WIELOW FAMIEY. 8l 



in appearance that they might easily be mistaken for two dis- 

 tinct species and it would not be strange if this aphid has 

 already been described under several names. 



Aly color notes on collection 30-06, Veazie, June ig, 1906, 

 Sali.v may be of interest in this connection. The apterous vivi- 

 parous female had dorsal surface blackish with single well 

 defined yellowish green streak extending from front of head 

 to style, — streak very narrow through head but broadening in 

 the central surface of body to an ovate space, narrowing again 

 toward tip of abdomen. Cornicles yellow, style yellowish 

 green, whole ventral surface greenish yellow. The apterous 

 aphides that the form just described give birth to are uniform 

 pale yellowish green with two vivid green longitudinal lines on 

 the abdomen. 



The alate viviparous females of this species present at the 

 same date (June 15) have head and thorax black and abdomen 

 black with greenish yellow lateral margin, cornicles dark, ven- 

 tral abdomen greenish yellow. The wing (Fig. 46 E) is uni- 

 formily smoky dark with slender brown veins and brown 

 stigma. For antennae see Figs. 32 and 33. 



EUilM l/ J rm-rrf^ 



Fig. 32. C. viminalis. Antenna of alate female. 

 Fig. ;i2)- Antenna of apterous female. 



There are other species of Chaitoplwrus on Salix in Maine 

 but my notes are not sufficient to record. 



Aphis salicicola Thomas, I have taken only twice. It is 

 characterized by long cylindrical cornicles, a style proportion- 

 ately long, and the short branch of Media (Fig. 46 L). The 

 relative length of the antennal segments are shown in Fig. 34. 

 Antennal III has a single row of about seven rather faint 

 sensoria. Fig. 35 shows the cornicle drawn to the same scale 

 as the antenna. 



