192 BULLETIN 190, UNITED STATES NATIONAL MUSEUM 



Tongue well developed, spiraled. Antenna of male broadly but finely 

 bipectinate; of female simple, thickened; tip without tuft. Labial palpus 

 short, upcurved, loosely scaled, flattened ; third joint blunt, with scales 

 projecting above apex. Thorax with posterior tuft and with two hair 

 pencils at the bases of tjie hindwings. Anal tuft short, rounded. Hind- 

 tibiae above with long rough scales especially at the spurs ; first tarsal 

 joint thickened with scales. Forewing with 11 veins, vein 2 absent; 7 

 and 8 stalked, 7 to apex; 10 and 11 well separated, parallel. Hindwing 

 with veins 3 and 4 long-stalked. 



Male genitalia with short upright socii, harpes short rectangular, simple 

 without specialized scales ; ventral plate large ; aedeagus long, straight ; 

 vinculum with a moderately long, anterior process. 



Female genitalia with upper part of ductus bursae strongly sclerotized 

 and looped on itself. 



KEY TO NORTH AMERICAN SPECIES OF BEMBECIA 



Thorax and abdomen marked with lemon yellow marginata marginata (Harris) 



Thorax and abdomen marked with very pale yellow or white. 



marginata var. albicoma Hulst 



BEMBECIA MARGINATA (Harris) 



Trochilium marginatum Harris, Amer. Journ. Arts and Sci., vol. 36, p. 309, 1839. — 

 Morris, Synopsis of the described Lepidoptera of North America, p. 137, 1862. — 

 LiNTNEK, 23d Ann. Rep. New York State Cabinet Nat. Hist., 1869, p. 192, 1873. 



Sphecia? marginata Walker, List of the specimens of lepidopterous insects in the 

 collection of the British Museum, pt. 8, p. 12, 1856. 



Aegeria pleciaefonnis Walker, List of specimens of lepidopterous insects in the 

 collection of the British Museum, pt. 8, p. 40, 1856. — Hy. Edwards, Papilio, 

 vol. 1, p. 206, 1881. 



^Icgeria odyneripennis Walker, List of specimens of lepidopterous insects in the 

 collection of the British Museum, pt. 8, p. 42, 1856. — Hy. Edwards, Papilio, 

 vol. 1, p. 206, 1881. 



Trochilium odyneripennis Morris, Synopsis of the described Lepidoptera of North 

 America, p. 332, 1862. 



Sesia odyneripennis Boisduval, Histoire naturelle des insectes : Species general des 

 lepidopteres heteroceres, vol. 1, p. 437, 1874. 



Sesia pleciaeformis Boisduval, Histoire naturelle des insectes : Species general des 

 lepidopteres heteroceres, vol. 1, p. 436, 1874. 



Aegeria riihi Riley, Sixth report on the noxious and other insects of the State of 

 Missouri, p. Ill, 1874. — Thomas, Sixth report of the State entomologist on the 

 noxious and beneficial insects of the State of Illinois, 1876, p. 40, 1877. — 

 Perkins, 4th Rep. Vermont Board Agr., p. 146, 1877. — Bruner, Rep. Nebraska 

 Hort. Soc, 1891, p. 196. 



Sesia flavipes Hulst, Bull. Brooklyn Ent. Soc, vol. 3, p. 76, 1881. 



Albuna odyneripennis Grote, New check list of North American moths, p. 12, 1882. 



Bemhecia marginata Hy. Edwards, Papilio, vol. 2, p. 52, 1882. — Riley, Amer. Nat., 

 vol. 17, p. 792, 1883. — Saunders, Insects injurious to fruits, p. 303, 1883. — 

 LiNTNER, New England Homestead, vol. 20, p. 189, 1886. — BEuxENMiJLLER, Ann. 

 New York Acad. Sci., vol. 5, p. 204, 1890; Bull. Amer. Mus. Nat. Hist., vol. 5, 

 p. 22, 1893; vol. 8, p. 118, 1896; vol. 9, p. 218, 1897; Mem. Amer. Mus. Nat. 



