15() THE CANADIAN ENTOMOLOGIST. 



bushes the last of September. These last specimens measure in length, 

 from forehead to tip of cauda, 2 mm., while the nectaries measure 

 from base to tip 1.78 mm. Antennas reaching to tip of nectaries. Com- 

 parative lengths of segments can be obtained from measurements. 

 Antennae except basal segment slender, basal segment very large in pro- 

 portion to the others. Legs quite long, nectaries large at base and taper- 

 ing, each long and ensiform. 



Measurements : Length of body from forehead to base of cauda, 

 2 mm.; width, .85 mm. Length of antennal segments, I, .176 ; II, .09; 

 III, .82; IV, .622; V, .644 ; VI, .176; spur, 1.29 mm.; total length, 

 2.818 mm. Length of nectaries, 1.622 mm. Length of cauda, .33 mm. 



Oviparous female resembles the viviparous female, except in the 

 colour of the body, which is rosy red. 



Alate Male. — What we supposed to be the males of this species were 

 collected on wild rose bushes under Ajjielanchier alnifolia. 



General colour green with rosy tint ; five transverse bands may be 

 found on the abdomen. These are broken so as to appear like ten spots. 

 Head and thorax dusky. Antennae except first two segments dusky. 

 Legs with dusky joints and tarsi. Nectaries dusky, cauda rosy coloured. 

 Third segment with numerous small sensoria ; fourth with about thirty ; 

 fifth with about twenty. A very interesting character of this species is 

 found in three small sensoria on the sixth segment besides those at the 

 base of the spur. One of these may be found at each end of the segment 

 and the third lies midway between. 



Measurements : Length of body from forehead to base of cauda, 

 1.066 mm.; width, .52 mm. Length of wing, 2.7! mm.; width, 1 mm.; 

 total wing expansion, 5.93 mm. Length of antennal segments, I, .11 ; 

 II, .045; III, .6; IV, .49; V, .58; VI, .135; spur, 1.174 mm.; total 

 length, 2.134 mm. Length of nectaries, .75 mm. Length of cauda, 

 .198 mm. 



Myzus I'hanmi Boyer. 

 Syn. MacrosipJntin rhamni Clarke. 



This species is very abundant about Corvallis on Rhajtiiius piirshiana. 

 The entire development is apparently passed on this plant as they were 

 present throughout the year. I have not seen specimens of Clarke's 

 Macrosiphuin rhanmi and repeated efforts to locate the types, if there are 

 any, were unsuccessful. From the description I am led to believe that 

 the California species is the same as the one found in Oregon, and there 



