102 APHID NOTES 



tip curved outward as in Myzus. Cauda short and ensiform. Entire body 

 with medium length capitate hairs. 



Measurements: Length of body, 2.77 mm.; width, 1.22 mm. Length of 

 antennal segments: III, 1.2 mm.; IV, 0.88 mm.; V, 0.73 mm.; VI, 0.154 mm.; 

 spur, 1.2 mm. Length of nectaries, 1.2 mm.; length of cauda, 0.3 mm. 



Alale viviparous female: General color green with the head and thorax 

 orange brown. Antennae black except the first two segments, which are 

 dusky green or browTi. Legs with base of femora yellowish, nectaries dusky 

 orange at the tip, green at the base. Cauda green. Antennae long and 

 slender and thu-d segment with from 20 to 26 regular round sensoria in straight 

 ahgnment. Wing venation normal. Antennae long, slender and with the 

 distal half strongly curved outward. Cauda short and ensiform. Entire 

 body except cauda and nectaries set with short capitate hairs. Cauda and 

 caudal plate with pointed hairs. 



Measurements: Length of body, 2.5 mm.; width, 0.9 mm. Length of 

 antennal segments: III, 1 mm.; IV, 0.84 mm.; V, 0.777 mm.; VI, 0.242 mm.; 

 spur, 1.33 mm. Length of nectaries, 0.67 mm.; length of cauda, 0.27 mm.; 

 length of wing, 4.4 mm.; width, 1.66 mm. 



Lachnus laricifoliae new species (Plate X, figs. 9 to 14.) 



Collected on Larix occidentalis in Baker and Grant Counties, 

 Oregon. The apterous forms are rather easy to find but not 

 exceedingly numerous, while the alate forms are scarcer and harder 

 to find. They are for the most part found about the base of the 

 needle clusters. 



Apterous viviparous female: General color black with a covering of white 

 powder and with a hght streak down the center of the dorsum. The antennae 

 are dusky yellow at the base and black toward the tip. The legs are black 

 except the basal portions of the femora and the center of the tibiae, which are 

 dusky yeUow. Cauda black. Body broadly oval and elongate. Antennae 

 rea(!hing to the base of the middle pair of legs and beak reaching to base of 

 hind pair. Nectaries of medium diameter at the base and narrowly tapering 

 to a wide funnel-shaped mouth. Cauda short and broadly rounded at the 

 tip. Entire body, legs, nectaries and antennae covered with hairs. 



Measurements: Length of body, 4.23 mm.; width, 2.22 mm. Length of 

 antennal segments: III, 0.73 mm.; IV, 0.27 mm.; V, 0.31 mm.; VI, 0.154 mm.; 

 length of cauda, 0.154 mm.; width at base, 0.42 mm. Length of hind tibiae, 

 2.22 mm.; length of hind tarsus, 0.35 mm.; length of hind metatarsus, 0.13 mm. 



Alate viviparous female: General color black covered with a white powder 

 and with a light streak down the center of the abdomen. Antennae and legs 

 the same as in the apterous form. Head and thorax shining black. Nectaries 

 black, with a large white spot at the base of the nectaries and which does not 

 become conspicuous until the specimens have been put in alcohol. Cauda as 

 in the apterous form. Antennae reaching to the base of the wings and the 

 third segment with from 8 to 11 regular small sensoria; fourth segment with 



