SYNANTHEDON. By B. Zukowsky. 
1235 
said to be bluish black, palpi above black. Antennae filiform, plain, rough below. Anal tuft with fewer pale 
hairs than in the $. Forewing with a broader scaled part in the distal area. Para. 
S. blaciformis Wkr. Green. Face wdfite. Collar with white hair. Palpi white below. Antennae club- blaciformis. 
shaped, hairy beneath, twice as long as thorax. Pectus white. Abdomen almost thrice as long as thorax. 
Anal tuft black, very long. Legs with white bands. Forewing transparent, cross-vein and margins purple. 
Hindwing the same. 18—20 mm. Amazon Valley. 1 $. 
S. pulchripennis Wkr. Dark blue, of a slender structure. Head silvery white in front and at the posterior pulchripen- 
edge. Palpi oblong, silvery white. Antennae black. Abdomen almost three times longer than the thorax. 
Anal tuft very long. Anterior coxae silvery. Anterior tibiae very short, silvery beneath, hind tibiae with a 
silvery band and silvery hair-tufts, anterior tarsi silvery beneath, j)osterior tarsi densely white-haired and 
with a white hair-tuft at the beginning. Fore wing blue, transparent at the base, distal area mostly purple. 
Hindwing transparent, veins, margins and fringe black. 22 mm. Ega. 1 $. 
S. edwai'dsii Beut. (178 d). Head black. Face and palpi white with a black exterior streak. Antennae edwardsii. 
and thorax black with a very narrow line on each side. Abdomen black with dingy yellow bands on the 2nd, 
4th and last segments. The 4th segment yellow above and beneath, the 5th only beneath. Anal tuft black, 
yellowish on the sides. Femora black, middle and hind tibiae yellow with a black ring at the end. Tarsi yellow 
and black, anterior coxae white. Forewing dull brownish black, warming into violet with a few yellow streaks 
in the cell and behind the cross-vein, the yellow more intense beneath. Hindwing dingy dark yellow, veins 
and margins violet, a quite transparent light brown stripe between veins 1 a and 2. 24 mm. Colorado. The 
is not yet known. 
S. florisantella Cock, is very similar to S. arctica Beut. (177 b). Antennae black, basal halves below fiorisantella. 
finely dentate. Hindhead with long rough pale hair, cheeks and face whitish. Palpi long and bristle-like, black 
outside, white above and inside. Proboscis small. Thorax black above, with a metallic green reflection, the 
sides with black and white scales, a distinct white spot below near the base of the wings, collar coppery. Legs 
black and white, the long hair of the femora beneath white, spurs whitish. Forewing purple black with scat¬ 
tered white scales, a small white spot in the cell and distinct white streaks in the distal area between the dark 
veins. Hindwing transparent pearly white, costa and veins black, fringes of both wings long and black. Ab¬ 
domen purple black, a trace of white on the 2nd, a narrow purely white band on the 4th and penultimate seg¬ 
ments. Anal tuft black. 14 mm. Florissant, Colorado. 1 <$ in June, at a dry place. Cockerell somewhat 
doubtfully refers to the hitherto unknown <$ of S. nigra Beut. (178 b). 
S. utahensis Beut. Head black Face and palpi golden yellow. Collar yellow in front, the rest black, utahensis. 
Antennae black with a blue reflection. Thorax brown with a broad yellow band along the patagia and a yellow' 
shoulder-spot at the base of the forewing. Posterior margin of the thorax with yellowish hair. Femora golaen 
yellow above, brown beneath, tibiae golden yellow with a broad brown band at the tips, the first tarsal joint 
golden yellow, the following ones brown. Abdomen with a very broad golden yellow band on the posterior 
part of the 2nd segment above and beneath, the 4th and last segments quite golden yellow; the 1st, 3rd and 
5th above brown with few yellow scales, brown beneath, except the 5th which is quite golden yellow. Anal 
tuft golden yellow, black in the middle and laterally. Forewing brown with the otherwise hyaline spots golden 
yellow, similar to edwardsii (178 d) to which it is allied. Hindwing golden yellow at the base, outside as well 
as the fringe brown. 23 mm. Washington County, Utah. In June. Only 1 $. 
S. pyrosoma Meyr. Head reddish, mixed with orange. Palpi orange, whitish at the base. Antennae pyrosoma. 
dark brown. Abdomen reddish orange. Anal tuft from dark blue to reddish. Forewing dark blue with a reddish 
reflection, a reddish orange basal spot, a subtriangular hyaline spot at the end of the cell, cliscal vein strong, 
distal area hyaline, crossed by four dark brown veins. Fringe dark rust-coloured. Hindwing hyaline, veins 
blackish, a narrow thickened black spot on the cross-vein between 5 and 7, a dark brown irregular distal margin, 
broadest at the costa, enclosing a blurred yellowish apical spot; margin reddish orange. Fringe brownish. 
13 mm. British Guiana, in April. Only 1 $. 
S. halmyris Drc. Forewing black, the end of the cell and a round spot below it hyaline. Hindwing halmyris. 
transparent, fringe black. Head, thorax and abdomen black, base of abdomen slightly yellowish. Antennae 
black with a broad white preapical ring. Legs greyish black. 25 mm. Mexico: Rincon, Guerrero, 950 m. 
September. 
S. hispides Drc. Forewing dark black, the cell and a round spot at the end of it semitransparent. Hind- hispides. 
wing hyaline, veins and fringe black. Head, thorax and abdomen lustrous black, thorax beneath white. An¬ 
tennae and legs black. 19—20 mm. Mexico: Amula, Guerrero, 2000 m; August. 
S. ventralis Drc. Head, antennae, palpi, tegulae, thorax, abdomen, and legs black. Collar and anal ventralis. 
tuft bright red, below with a few long black hairs. All the wings hyaline, costal and distal margins of both 
wings black, veins the same. 25 mm. Eastern Peru! Clianchamayo, 2000 m. 1 <$. 
