60 MISCELLANEOUS STUDIES 



18. Ill with but two or four sensoria near base; longer than VI spur. 



gr anarium ( Kirby ) * 



Ill with six or so sensoria on basal one-half ; shorter than or equal to VI 



spur rosae (Linn.)* 



19. Cornicles longer than III 20 



Cornicles at most subequal to III 21 



20. Antennae pale, except VI and the apices of III to V. Cornicles slightly 



swollen near distal end Stanley! Wilson* 



Antennae dusky, except III, basal part of IV, and perhaps the extreme base 



of V. Cornicles long, slender, and out-curved californicum (Clarke)* 



21. Cauda broad, and blunt, with the sides almost parallel and about half as long 



as cornicles lactucae (Kalt.) * 



Cauda slender-pointed, and more than half as long as cauda 22 



22. VI spur and III subequal solanifolii (Ashmead)* 



VI spur considerably longer than III cucurbitae (Thomas)* 



59. Macrosiphum albifrons Essig 



Figures 143, 144 



Davidson, Jour. Econ. Ent., vol. 2, p. 304, 1909. Macrosiphum sp. (list). 

 Essig, Pom. Jour. Ent., vol. 3, p. 543, 1911 (orig. desc.). 



Records. Lupinus sp., Santa Paula (Essig) ; Stanford University (Davidson) ; 

 Jasper Ridge, Coast Range Mountains, Santa Clara County, April, 1912 (V. G. 

 Stevens) ; Berkeley, April, 1915 (Geo. Shinji) ; Mount Hood, Oregon, August, 

 1916 (E. A. McGregor). 



This large, flocculent aphid is found occasionally infesting various 

 lupines throughout the Pacific Coast, from southern California north, 

 well into Oregon. The author has specimens from Berkeley and 

 Oregon, although he has never collected it himself. 



60. Macrosiphum ambrosiae (Thomas) ? 



Thomas, 111. Lab. Nat. Hist., Bull. 2, p. 4, 1878. Siphonoplwra (orig. 



desc.). 

 Sanborn, Kans. Univ. Sci., Bull. 3, p. 74, 1904 (desc.). 



Beoords. Helianthus annuus; Orange (T. D. A. Cockerell) ; San Diego, April, 

 1916. 



In 1915 the author received a few specimens of this species from 

 T. D. A. Cockerell from Orange, and in 1916 he collected it once on 

 sunflower in Exposition Park, San Diego. At first it was thought to 

 be M. sonchi (Linn.), and was so reported by Cockerell. Since then 

 it was identified by J. J. Davis as probably M. ambrosiae (Thomas). 



