774 Pomona College Journal of Entomology 



Tuberolachnus viminalis (Beyer de Fonscolombe) Mordwilko 

 (The Large Spotted Willow Aphid) 



1841. Aphis viminalis Fonsc. Ann. See. Ent. Pr. 

 1846 Aphis salicis Curtis-Brt. Ent. Jr. Roy. Agrcl. Soe. 

 1848 Aphis saligna 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 viminalis Fonsc. -Buck, Aphid. Brit. Ill, pp. 53-57. 

 1887 Lachnus viminalis Fonsc.-Oestl. Aphid. .Minn. p. 32. 

 1890 Lachnus dentatus Le B.-Packard. Forest Ins. 593. 

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

 118. 



id. Agr. Science 4, 155. 



id. Rept. Columbus Hort. Soc. 166. 

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



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



not given. ) 



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



1908 T-uberolachnus viminalis (B.')yer)-]Mordwilko Ann. ^lus. Zool. 



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

 1910 Tuberolachnus viminalis (Beyer) -Mord.-Wilson. Ent. News, XXI, 



p. 156. 

 1910 Lachnus viminalis Fonsc.-Davidson. Jr. Ec. Ent. Ill, p. 374. 



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



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

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



52. 

 1911 Lachnus viminalis ( Boyer) -Es.sig. P. C. Jr. Ent. Ill, 462. 

 1911 Tuberolachnus viminalis ( Boyer) -Mord.-Essig. P. C. Jr. Ent. Ill, 



467. 



WINGED VIVIPAROUS FEMALE (Figure 245, A) 

 Length of body 4.2 mm., width of the mesothorax 1.1 mm., width of the 

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

 which I have ever collected. Body — Large, rather fiat, narrow anteriorly 

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

 coat of fine white powder, rrevailing 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. Etjts — 

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

 short, reaching to the base of the thorax, rather slender, bases far apart, hairy, 

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

 0.55 mm. ; IV, 0.27 mm. ; V, 0.27 mm. ; VI, 0.25 mm. (spur or unmiis 0.04 mm.) ; 

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

 wider and sometimes a little longer than II; III is by far the longest article 



