252 beutenmuller, monograph of the SESIID^E. 



Memythrus asilipennis (Boisd.). 



Plate XXX, Fig. o, Male, and Fig. ii, Female. 



Sesia asilipennis Boisduval, Guerin-Meneville, Cuvier's, Regne Animal, Vol. II, 1829, p. 496, pi. 



lxxxiv, fig. 3 (male) ; Suites a Buffon, Nat. Hist. Lepid. Het. I, 1874, p. 391 ; Wilson, Treat. 



Ins. Gen. Syst. Encyclo. Brit. 1835, p. 244, pi. cexxxvi. 

 Algeria asilipennis Martin, 5th Rep. Nox. Ins. 111. (Thomas), 1880 (1881), p. 109 ; Hy. Edwards, 



Ent. Am. Vol. Ill, 1888, p. 224. 

 Trochilium vespipenne Herrich-Schaffer, Ausseurop. Schmett. 1850-58, p. 57, fig. 217 (female). 

 Trochilium denudatum Harris, Am. Journ. Arts and Sciences, Vol. XXXVI, 1839, p. 310 (female) ; 



Ins. Inj. Veget. 1841, p. 231 ; ibid. 2nd Ed. 1852, p. 252 ; 3rd Ed. 1862, p. 330 ; Morris, 



Synop. Lepid. N. Am. 1862, p. 138 ; Kellicott, Can. Ent. Vol. XIII, 1881, p. 8. 

 Sesia denudata Boisduval, Suites a Buffon, Nat. Hist. Lep. Het. I, 1874, p. 435. 

 Algeria denudatum Packard, Ins. Inj. For. and Sh. Trees, Bull. No. 7 U. S. Ent. Com. 1881, p. 138. 

 Fatua denudatum Hy. Edwards, Papilio, Vol. II, 1882, p. 97. 

 Falua denudata Grote, New Check List N. Am. Moths, 1882, p. 11 ; BeutenmOller, Ann. N. Y. 



Acad. Sc. Vol. V, 1890, p. 204; Smith, Cat. Ins. N. J. 1890, p. 288 ; Packard, 5th Rep. 



U. S. Ent. Com. 1890, p. 540. 

 Tarsa denudata Beutenmuller, Bull. Am. Mus. Nat. Hist Vol. V, 1893, p. 22 ; ibid. Vol. VIII, 1896, 



p. 124; ibid. Vol. IX, 1897, p. 219; Lugger, 1st Rep. Ent. Agricul. Exp. St. Minn. 1895 



(1896), p. 96, pi. v, fig. 51 (no name). 

 Tarsa bojnbyciformis Walker, Cat. Lepid. Brit. Mus. Pt. VIII, 1856, p. 61 (male) ; Boisduval, 

 Suites a Buffon, Nat. Hist. Lepid. Het. I, 1874, p. 463. 



Male. — Head blackish, palpi pale yellowish white beneath, rufous above. Antennae rufous. 

 Collar edged with dull orange brown. Thorax brown, patagia rufous, hind portion with a yellow 

 transverse line. Abdomen dull brown black with a very narrow yellow ring at the posterior edge of 

 each segment above and below. Legs orange, femora black. Fore wings transparent with narrow 

 brown borders and discal mark which is marked with rufous ; underside marked with orange 

 brown on the opaque portions of the wings. Hind wings transparent, with a very narrow brown 

 border ; underside similar to the upper. 



Female. — Like the male, but the fore wings are opaque, deep brown, violaceous, with an oblique 

 reddish discal mark and a triangular transparent area above the hind angle. Abdomen like that of 

 the male, but more robust, with the second segment marked with red above. Antennae simple. 



Expanse : Male, 30-38 mm.; female, 32-44 mm. 



Habitat. — New Hampshire to Florida, westward to Minnesota and southward to Texas. 



Type : One female (M. denudatum). Coll. T. W. Harris, Boston Soc. Nat. Hist. 



The male may be readily distinguished from all other Sesiids by the char- 

 acter of the antennas, which have very long pectinations. The wings are trans- 

 parent in this sex, while in the female the fore wings are opaque, except a small 

 triangular patch at the hind angle, thus looking like a different species. The 

 male was described as Sesia asilipennis and Tarsa bombyciformis and the female 

 as Trochilium vespipenne and T denudalum. In the larval stage the insect lives 

 in the roots of the ash and alder. 



Memythrus dollii (Neunt.). 



Plate XXX, Fig. 4, Female. 



Sciapteron dollii Neumoegen, Ent. News, Vol. V, 1894, p. 330 ; Beutenmuller, Bull. Am. Mus. 

 Nat. Hist. Vol. VIII, 1896, p. 122 ; ibid. Vol. IX, 1897, p. 218. 



