52 



THE CANADIAN ENTOMOLOGIST 



Apterous viviparous female. 

 Light green or pale according to niches. Length of body 

 2.6-3.4 mm. Width of abdomen L2 mm.-L7 mm. Eyes dark 

 red. Beak reaching third coxa, tips dusky. Antenna situated 

 on frontal tubercles, apices of III, IV, apical half of V and VI in- 

 cluding spur dusky, rest pale or green. Head, thorax and abdomen 

 light green or pale. Legs colour of body except tarsi, which are 

 dusky. Cornicles colour of body, swollen beyond middle, length 

 .7-9. mm. Style moderately long, colour of the body. 



Fig. 5. — Amphrophora ciculse. — G, third antennal articles of alate 

 viviparous female; 7, third joint of apterous viviparous form; 

 8, cornicle of alate. and 9. cornicle of apterous female. 



Host plant — Cicuta virosa var. californica. 



Locality. — LTniversity of California campus, Berkeley, California, 



Date of collection. — April 20, 1915. 



Notes. — This species is nearer to A. rubi Kalt. than A. laty- 

 siphum Davdn. It differs from A. rubi in the following charac- 

 ters: (1) Spur with its base longer or at least as long as V plus IV 

 or III plus V. (2) Sensoria on III about one-half as many as in 

 A. rubi. (3) III of apterous forms without or with fewer sensoria. 

 (4) Shape, size and coloration of cornicles. 



The following numerical data, obtained with the writer's 

 collection of A. rubi Kalt. at the same date and locality, may be 

 of use for comparison : 



A. rubi Kalt. — Length of antennal joints of alate form: III, 1.2 

 mm.; IV, .7 mm.; V, .6 mm.; VI, .2 mm.; spur, 1.3 mm. Length 

 of body 3.5 mm. Width of abdomen 1.4 mm. Width of pro- 

 thorax .7 mm. Sensoria on III 35-45. 



Host plants. — Wild and cultivated blackberry. 



