1234 
SYNANTHEDON. By B. Zukowsky. 
achillae. 
floridensis. 
gcliformis. 
sap ygaefor- 
mis. 
animosa. 
pyralidifor- 
mis. 
ruficaudis. 
rl> yssaefor- 
m is. 
side. Legs black, middle and hind tibiae with a broad scarlet band. Abdomen bluish black, opalescent, the 
4th and the two last segments scarlet, the others laterally scarlet. Anal tuft scarlet with bluish black sides. 
Forewing metallic bluish black with a scarlet stripe at the inner margin, which extends somewhat beyond the 
middle, fringe brown, reddish beneath at the base. Hindwing transparent, margin violet, base and the be¬ 
ginning of the inner margin red, fringe brown. $: similar to the <$, but the hindwing is quite scarlet, lighter, 
with a very broad brownish black distal margin, with a violet reflection. The 4th and last segments of the 
abdomen scarlet, lateral line the same. 18—20 mm. Only known from California. Larva in the root of species 
of Polygonum; it emerges shortly above the soil. 
S. achillae Hy. Edw. ( — cremocarpi Hy. Edw.) (178 c). Head, collar and antennae black. Palpi black, 
red beneath at the base. Thorax metallic bluish black with little red patagia and a red spot on each side be¬ 
neath. Abdomen above and beneath quite metallic bluish black. Anal tuft red, bluish black above on the sides. 
Legs completely bluish black. Forewing metallic bluish black or greenish black with a red streak on the inner 
margin, extending from the base to about the middle of the wing. Hindwing transparent with bluish black 
margins. 15-18 mm. California. %$<$■ 
S. floridensis Grt. (178 c). Head and antennae black. Palpi black at the base, reddish apically. Collar 
red. Thorax bluish black with a very prominent red transverse marking on the hindmost part, and a red spot 
on each side beneath. Abdomen bluish black, the 4th segment above and beneath bright red, narrow red belts 
on the two last segments above. Anal tuft black, feebly white laterally. Legs black, tarsi red, hind tibiae red 
with a black band, anterior coxae with a red stripe. Forewing metallic purple black with a transparent basal 
streak, cell and inner margin bright red, beneath almost quite red, veins dark. Hinclwing transparent with 
violettish brown margins, the margins beneath red. fringe brown. 14 —18 mm. Florida. Apparently only 
SS are known. 
S. geliformis Wkr. (178 c). Head, thorax, palpi, antennae and legs quite black with a greenish reflection. 
Abdomen above and beneath bright red except the 1st segment which is bluish black. Anal tuft red, laterally 
black. Forewing above and beneath quite bluish black. Hindwing transparent, the margins broader brownish 
black than usual. $ 10 mm. $ 15—-19 mm. Florida, St. Vincent (British West Indies), Mexico. 
S. sapygaeformis Wkr. (178 c). Head and antennae black. Palpi red, black outside, especially at the 
base. Collar red. Thorax black with a red posterior transverse marking, a red spot beneath on each side. The 
first 3 segments of the abdomen black, in the E the last four, in the $ the last three above and beneath red. 
Anal tuft black. Legs red and black, tibiae with a broad red band. Forewing bluish black, purple outside 
with a red streak which is transparent at the base; beneath red from the base almost to the middle, dark out¬ 
side. Hindwing transparent, distal margin violettish black, rather broadly scaled at the apex. 17—19 mm. 
Florida. 
S. animosa Ely. Edw. (178 c). head and antennae bluish black, palpi red, tips black, sometimes 
mixed with black hairs. Thorax blackish bronze, patagia red behind, a red spot on each side beneath. Ab¬ 
domen blackish bronze, the last segment red, the three preceding ones laterally red. Anal tuft red, laterally 
black. Legs greenish black. Forewing metallic greenish black with a red inner-marginal streak extending to 
beyond the middle. Beneath as above. Hindwing transparent, the narrow margins brownish black. head, 
thorax, legs and forewings as in the <J, fully scaled, but the hindwings likewise metallic greenish black or bluish 
black, above and beneath. The last three adominal segments laterally red, all are black above. Anal tuft also 
black. 16—20 mm. Arizona. 
S. pyralidiformis Wkr. ( = nigella Hulst) (178 d). Head purple brown. Palpi and collar yellow. Thorax 
purple black with very narrow light stripes on each side and yellow spots beneath. Abdomen purple black, 
the 4th segment quite yellow above, the posterior margin of the last segment with a yellow belt, absent in 
the $. Anal tuft purple brown, feebly yellow on the sides. Legs purple brown, hind tibiae with yellow rings 
before the end, tarsi light. Forewing purple brown, densely scaled, yellow beneath at the base. Hindwing 
transparent with a narrow purple brown margin. 14—20 mm. From Canada to Texas. 
S. ruficaudis Wkr. Metallic blue with a coppery or purple lustre. Orbita silvery, head yellow behind. 
Palpi erect, golden yellow. Antennae black. Abdomen tapering off behind, more than thrice as long as the 
thorax, bright red towards the end. which colour passes over into the long anal tuft exhibiting here also a few 
black hairs; beneath golden yellow. Legs slender, golden yellow, posterior femora purple, very short, hind 
tibiae purple at the end, hind tarsi long and purple. Forewing transparent, very narrow, costa, distal area and 
cross-vein purple. Hindwing transparent, all the fringes purple. 22 mm. Ega. 
S. rhyssaeformis Wkr. bluish green. Head coppery, white in front on each side, and with white 
hair behind. Palpi whitish, black apically. Antennae very much longer than the thorax, rather thick at the 
ends. Thorax with a yellow streak on each side. Abdomen with white bands on the posterior margins of the 
segments; beneath white, anal tuft with a few scale-hairs on each side. Legs with white bands. Wings trans¬ 
parent: forewing with a purple brown costa, distal area and discal band. 18 mm. The doubtful $ of it is 
