774 Pomona College Journal op Entomology 



Tuberolachnus viminalis (Beyer de P'onscolombe) Morclwilko 

 (The Large Spotted Willow Aphid) 



1841. Aphis vinnnalis Fonsc. Ann. See. Ent. Fr. 

 1846 ApJiis salicis Curtis-Brt. Ent. Jr. Roy. Agrcl. Soc. 

 1848 Aphis saliyna Walker- Ann. Nat. Hist. 

 1872. Lachnus dentatus Le Baron-Rept. Ins. 111. II, p. 138. 

 1880. Lachnus dentatus Le Baron-Thos. 8th Rept. Ent. 111., p. 116. 

 1881 Lachnus liniinalis Fonsc. -Buck, Aphid. Brit. Ill, pp. 53-57. 

 1887 Lachnus liniinalis Fonsc. -Oestl. Aphid. ]Minn. p. 32. 

 1890 Lachnus dentatus he B.-VaQkard. Forest Ins. 593. 

 1890 Lachnus dentatus LeB.-Weed. Bull. A. E. S. 0. Tech. Ser. I, 117- 

 118. 



id. Agr. Science 4, 155. 



id. Rept. Columbus Hort. Soc. 166. 

 1892 Lachnus dentatus he B.-Oshorn. Cat. Hem. la. 129. 



1904 Lachnus viminalis (Fonsc.) -Coekerell-Can. Ent. (Separate, date 



not given.) 



1905 Lachnus viminalis Boyer-Schouteden-Cat. Aphid. Belg. 207. 



1908 Tuberolachnus viminalis (Boyer)-Mordwilko Ami. Mus. Zool. 



Acad. Imp., Des. Sci. Tome XIII, 374. 

 1910 Tuberolachnus viminalis (Boyer)-^Iord. -Wilson. Ent. News, XXI, 



p. 156. 

 1910 Lachnus vimi)ialis Fonsc. -Davidson. Jr. Ec. Ent. Ill, p. 374. 



1910 Lachnus dentatus he B.-Davis. Jr. Ec. Ent., HI, p. 413. 



1911 Lachnus viminalis Boyer- Wilson. Ann. Ent. Soc. Am. IV, 52. 

 1911 Tuberolachnus viminalis (Boyer) -Wilson. Ann. Ent. Soc. Am. IV, 



52. 

 1911 Lachnus viminalis ( Boyer) -Essig. I'. C. Jr. Ent. Ill, 462. 

 1911 Tuberohchnus viminalis ( Bo.ver)-Mord.-Essig. P. C. Jr. Ent. Ill, 



467. 



\viNGii> vivu'AKois FEMALE (Figure 245, A) 

 Length of body 4.2 mm., width of the mesothora.x 1.1 mm., width of the 

 abdomen 2.1 iiiiii.. wing expansion 12 mm. The largest insect of this family 

 which I have ever collected. Body — Large, rather flat, narrow anteriorlj' 

 and bluntly-pointed abruptly behind. Covered with short fine hair and a thick 

 coat of fine white powder. Prevailing color — From a dark brown to a rich 

 gray, with black spots. Head — Small, much wider than long, rounded and 

 broad in front, hairy, dark brown with very little white powder. Eyes — 

 Large, dark i)rown, with terete tubercles. Antennae — (Figures D and E) 

 short, reaching to the l>a.se of the thora.x, rather slender, bases far apart, hairy, 

 dark brown tliroughout, lengths of articles: I, 0.09 mm.; II, 0.09 mm.; Ill, 

 0.55 mm. ; IV, 0.27 mm. ; V, 0.27 mm. ; VI, 0.25 mm. (spur or un.siiis 0.01 mm.) ; 

 total 1.52 mm). Articles I and II are co-equal in length, though I is much 

 wider and sometimes a little longer than IT; Til is by far the longest article 



