240 BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 



Palpi nearly ascending, scarcely reaching top of head, loosely scaled ; second joint very long, 

 third joint very short. Antennae of equal width, slightly tapering at the tip ; very slightly ciliated in 

 the male, simple in the female. Hind tibiae clothed with a bunch of hairs at each end and a similar 

 bunch at the base of the tarsi, contiguous with the one on the tibiae. Fore and middle legs without 

 bunches of hairs. Abdomen of the male with a long, hairy tail-like appendage which divides the flat 

 anal tuft. Tongue present, distinct. Fore wings with 12 veins, R 4 and R 5 stalked. Hind wings 

 with vein Cu 2 from cell, M 3 and Cuj on a short stalk. Sc and R t coalescent. Discocellulars erect. 



Type: Algeria caudata Harris. 



Synopsis of Species. 



Wings orange, with a hyaline spot at the anal angle of hind wings korites. 



Fore wings violaceous ; hind wings transparent caudata. 



Alcathoe caudata {Harris). 



Plate XXIX, Figs. 7 Male and 8 Female. 



jEgezia caudata Harris, Am. Journ. Arts and Sciences, Vol. XXXVI, 1839, p./31'i ; Harris's Corresp. 



1869 (Scudder) pp. 249 and 262 ; Walker, Cat. Lepid. Brit. Mus. Pt. VIII, 1856, p. 42 ; 



Packard, Guide Study Insects, 1869, p. 278 ; Thomas, 2nd Rep. Nox. Ins. 111. 1877 



(1878), p. 172; Lintner, 23rd N. Y. State Cab. Rep. 1869 (1872), p. 60; Martin, 



Thomas's 5th Rep. Nox. Ins. 111. 1881, p. 108. 

 Trochilium caudatum Fitch, 3rd Rep. xNox. Ins. N. Y. 1856, p. 424; Morris, Synop. Lepid. N. 



Am. 1862, p. 139 ; Bethune, Can. Ent. Vol. I, 1868, p. 18 ; Hy. Edwards, Papilio Vol II 



l8 ^, p. 53- 

 Sesia caudata Boisduval, Suites a Buffon, Nat. Hist. Lepid. Het. I, 1874, p. 437. 

 Alcathoe caudatum Hy. Edwards, Papilio, Vol. II, 1882, p. 53 ; Grote, New Check List N. Am. 



Moths, 1882, p. n ; Beutenmuller Ann. N. Y. Acad. Sc. Vol. V, 1890 p 204 • Bull 



Am. Mus. Nat. Hist. Vol. VIII, 1896', p. n6 ; ibid. Vol. IX, 1897, p. 217'; Smith, Cat. 



Ins. N. J. 1890, p. 288 ; Kellicott, Can. Ent. Vol. XXIV, 1892, p. 24. 

 Acalthoe caudata Jack, Garden and Forest, Vol. IV, 1891, p. 496, fig. 77. ' 

 Alcathoe cordata Riley & Howard, Insect Life, Vol. IV, 1891, p. 220. 



Male.-Ilead black, face dull rufous ; palpi, collar, and antennae orange. Thorax violaceous 

 or dull rusty red brown. Abdomen black with a slight violet lustre, orange red beneath. Anal tuft 

 black tail-like appendage bright orange. Legs orange, middle and hind femora black on one side 

 and the bunch of hairs at the end of the tibiae also black. Fore wings violet, with a long transparent 

 area at the base sometimes extending to the middle of the wing. Discal mark sometimes slightly 

 indicated, dull orange. Hind wings transparent with an opalescent lustre ; discal mark the very 

 narrow outer margin, and fringes violet black. Undersides of wings somewhat brighter than 



Female.-U^d blackish, palpi and collar orange. Thorax and abdomen above and below 

 blackish. Fore wings violaceous, darker toward the base and lacking the transparent area. Fore 

 legs orange, coxae black. Middle and hind legs black with the tarsi orange. 



Expanse : Male, 20-25 m ™- ; female, 22-32 mm. 



Tllinnif^fM :C v nada, ^ ^^ ^ Middk StateS S0Uth to Florida > westw ard to Ohio, 

 Illinois, and Michigan. ' 



Types : Two males and one female. Harris Coll., Boston Soc. Nat. Hist. 

 Larva.-' 'Normal (S. exitiosa), epicranial lobes somewhat broadly touching, gradually diver- 

 gent above; head rounded and fuller than usual, paraclypeal piece! somewh^ointed above, 



