SYNANTHEDON. By B. Zukowsky. 
1227 
S. rubricincta Beut. Head bluish black. Collar black, orange in front. Palpi orange, the last joint above rubricinda. 
black. Antennae bluish black. Thorax greenish black or bluish black, metallic. Patagia with reddish orange 
hair. Abdomen black, bright red along the sides. Anal tuft metallic greenish black, red in the middle. Thorax 
orange below. The 1st and 2nd joints of the abdomen beneath bluish black, the others red. Legs steel-blue. 
Forewing bluish black, purple outside, red between the veins, fringe brown, basal area narrowly transparent, 
the transparent distal area likewise small, discoidal vein purple with a broad red streak, base of the wing red. 
Hindwing transparent, distal margin narrow, purple, fringe brown. Forewing beneath less distinctly marked, 
with an orange costa. 17-5 mm. Cochise County, Arizona; August. 
S. bolteri Hy. Edw. (= rubrofascia Beut. nec Hy. Edw.) (177 c). Head and thorax from deep steel- bolteri. 
blue to blackish, orbita white. Palpi above black, orange below. Antennae black, the last third before the apex 
yellowish. Abdomen blackish steel-blue, the 4th and 5th segments above and beneath broadly scarlet, also 
the 6th in the $ beneath. Anal tuft black with some white. Legs bluish black, tibiae with whitish hair-tufts, 
tarsi pale yellow. Forewing transparent, the costal and inner margins the same, the cross-vein blackish blue, 
distal area broadly scarlet or copper-red, veins black, fringe violettish brown. Hindwing transparent with a 
narrow black margin, fringe violettish brown. 12—20 mm. New York, New Jersey, Illinois, Manitoba. Larva 
in branches of willow. —- Apparently closely allied to the palaearctic S. formicaeformis. 
S. buprestiformis 117,r. Blue, head in front white on each side, palpi black, rather long, hairy, antennae buprestifor- 
black. Thorax with a red streak on each side, pectus beneath also spotted red. Abdomen with a broad red mit 
band at the base. Legs black, woolly below, white. Forewing purple red with a transparent basal streak and 
a broad golden yellow subapical band. Hindwing transparent with purple red margins. 22 mm. Amazon 
Valley. 1 $. 
S. fulvipes Harris (177 c). Head, antennae, thorax and abdomen deep black with a metallic blue re- fulvipes. 
flection. Palpi reddish orange below, black above. The 1st, 2nd and 3rd segments of the abdomen beneath 
orange. Legs beautifully orange, femora bluish black. Thorax below with a large orange spot on each side. 
Forewing transparent with narrow deep bluish black margins, discal mark narrow, bluish black, outwards with 
a small orange spot, inwards with a small dentiform projection, as in some tropical species of Melittia, the base 
of the wing with little orange. Forewing beneath slightly orange at the costa and inner margin. Hindwing 
transparent, margins narrow, bluish black. 22 mm. Canada, New England States. 
S. saxifragae Hy. Edw. (= henshawii Hy. Edw.) (177 c) is allied to fulvipes. Also quite black, no orange saxifragae. 
on the abdomen beneath. Palpi orange, tips black, in the $ black above, yellow below. Thorax yellow beneath 
on both sides, legs as in f ulvipes. Forewing transparent, with bluish black or violettish black margins, costal 
and inner margins narrow, cross-vein strong, distal margin broad. The base of the wing and the outside of 
the discal mark orange. Hindwing transparent with narrow bluish black or violettish black margins. 18—23 mm. 
Labrador, Colorado. 
S. castaneae Busch (177 c). Palpi yellow below, black above strewn with yellow scales, the terminal castaneae. 
half of the 3rd joint quite black. Antennae black with reddish bronze tips. Face bluish black, broadly white 
before the eyes. Head black, thorax metallic bluish black with two narrow yellow lateral stripes, in the $ also 
with a narrow yellow posterior margin. Forewing transparent in both sexes, veins bluish black mixed with 
yellow scales, fringe bluish black. Hindwing transparent, veins black, costal margin yellow, fringe bluish black. 
Abdomen deep bluish black with a yellow semi-ring on the 4th segment beneath, the $ also with narrow yellow 
3rd and 4th segments above. The end of the abdomen laterally yellow. Legs bluish black with narrow yellow 
rings at the ends of the different joints. Tarsi of the $ dusted yellow, tibiae of the hindlegs with a pale yellow 
ring near the tarsi. Lynchburg, Virginia, and Snow shoe, Pennsylvania. Bred from chestnuts. April, May. 
S. pictipes Grt. <£> Bob. (= inusitata Hy. Edw.). Head bluish black, sometimes with a few yellow hairs pictipes. 
between the antennae. Palpi pale yellow, black above. Collar somewhat yellow on the sides. Thorax bluish 
black with a narrow pale yellow line on each side. Abdomen bluish black with a very narrow pale yellow ring 
on the 2nd and 4th segments, closing beneath. Anal tuft pointed, bluish black, laterally white. Legs bluish 
black with narrow yellow hair-tufts on the tibiae and two yellow rings, one near the tarsi and one at the second 
middle pair of spurs, tarsi with yellow rings, anterior coxae yellow. Forewing transparent with narrow bluish 
black margins, cross-vein somewhat broader. Sometimes the inner margin is slightly scaled yellow. On the 
under surface the costal and distal margins and the cross-vein are yellowish. Hindwing transparent with narrow 
black margins, fringe the same, somewhat whitish towards the base. 15—26 mm. Canada to Florida and Texas, 
westward as far as the Pacific. The larva lives beneath the bark (trunk and stronger twigs) of plums, cherries, 
peaches, chestnuts and Amelanchier canadensis until the beginning of June. Imago June till July. 
S. viburni Engelh. Antennae black, in the $ whitish yellow before the tips. Palpi black above, yellow viburni. 
below. Head black, always yellowish between the eyes and behind. All the wings transparent, more broadly 
margined in the $ and mixed with yellowish, otherwise very similar to S. pictipes. Abdomen black, the 2nd seg- 
